CVE-2022-50396 (GCVE-0-2022-50396)
Vulnerability from cvelistv5 – Published: 2025-09-18 13:33 – Updated: 2026-05-11 19:18
VLAI
EPSS
VEX
Title
net: sched: fix memory leak in tcindex_set_parms
Summary
In the Linux kernel, the following vulnerability has been resolved:
net: sched: fix memory leak in tcindex_set_parms
Syzkaller reports a memory leak as follows:
====================================
BUG: memory leak
unreferenced object 0xffff88810c287f00 (size 256):
comm "syz-executor105", pid 3600, jiffies 4294943292 (age 12.990s)
hex dump (first 32 bytes):
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................
backtrace:
[<ffffffff814cf9f0>] kmalloc_trace+0x20/0x90 mm/slab_common.c:1046
[<ffffffff839c9e07>] kmalloc include/linux/slab.h:576 [inline]
[<ffffffff839c9e07>] kmalloc_array include/linux/slab.h:627 [inline]
[<ffffffff839c9e07>] kcalloc include/linux/slab.h:659 [inline]
[<ffffffff839c9e07>] tcf_exts_init include/net/pkt_cls.h:250 [inline]
[<ffffffff839c9e07>] tcindex_set_parms+0xa7/0xbe0 net/sched/cls_tcindex.c:342
[<ffffffff839caa1f>] tcindex_change+0xdf/0x120 net/sched/cls_tcindex.c:553
[<ffffffff8394db62>] tc_new_tfilter+0x4f2/0x1100 net/sched/cls_api.c:2147
[<ffffffff8389e91c>] rtnetlink_rcv_msg+0x4dc/0x5d0 net/core/rtnetlink.c:6082
[<ffffffff839eba67>] netlink_rcv_skb+0x87/0x1d0 net/netlink/af_netlink.c:2540
[<ffffffff839eab87>] netlink_unicast_kernel net/netlink/af_netlink.c:1319 [inline]
[<ffffffff839eab87>] netlink_unicast+0x397/0x4c0 net/netlink/af_netlink.c:1345
[<ffffffff839eb046>] netlink_sendmsg+0x396/0x710 net/netlink/af_netlink.c:1921
[<ffffffff8383e796>] sock_sendmsg_nosec net/socket.c:714 [inline]
[<ffffffff8383e796>] sock_sendmsg+0x56/0x80 net/socket.c:734
[<ffffffff8383eb08>] ____sys_sendmsg+0x178/0x410 net/socket.c:2482
[<ffffffff83843678>] ___sys_sendmsg+0xa8/0x110 net/socket.c:2536
[<ffffffff838439c5>] __sys_sendmmsg+0x105/0x330 net/socket.c:2622
[<ffffffff83843c14>] __do_sys_sendmmsg net/socket.c:2651 [inline]
[<ffffffff83843c14>] __se_sys_sendmmsg net/socket.c:2648 [inline]
[<ffffffff83843c14>] __x64_sys_sendmmsg+0x24/0x30 net/socket.c:2648
[<ffffffff84605fd5>] do_syscall_x64 arch/x86/entry/common.c:50 [inline]
[<ffffffff84605fd5>] do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80
[<ffffffff84800087>] entry_SYSCALL_64_after_hwframe+0x63/0xcd
====================================
Kernel uses tcindex_change() to change an existing
filter properties.
Yet the problem is that, during the process of changing,
if `old_r` is retrieved from `p->perfect`, then
kernel uses tcindex_alloc_perfect_hash() to newly
allocate filter results, uses tcindex_filter_result_init()
to clear the old filter result, without destroying
its tcf_exts structure, which triggers the above memory leak.
To be more specific, there are only two source for the `old_r`,
according to the tcindex_lookup(). `old_r` is retrieved from
`p->perfect`, or `old_r` is retrieved from `p->h`.
* If `old_r` is retrieved from `p->perfect`, kernel uses
tcindex_alloc_perfect_hash() to newly allocate the
filter results. Then `r` is assigned with `cp->perfect + handle`,
which is newly allocated. So condition `old_r && old_r != r` is
true in this situation, and kernel uses tcindex_filter_result_init()
to clear the old filter result, without destroying
its tcf_exts structure
* If `old_r` is retrieved from `p->h`, then `p->perfect` is NULL
according to the tcindex_lookup(). Considering that `cp->h`
is directly copied from `p->h` and `p->perfect` is NULL,
`r` is assigned with `tcindex_lookup(cp, handle)`, whose value
should be the same as `old_r`, so condition `old_r && old_r != r`
is false in this situation, kernel ignores using
tcindex_filter_result_init() to clear the old filter result.
So only when `old_r` is retrieved from `p->perfect` does kernel use
tcindex_filter_result_init() to clear the old filter result, which
triggers the above memory leak.
Considering that there already exists a tc_filter_wq workqueue
to destroy the old tcindex_d
---truncated---
Severity
5.5 (Medium)
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-01-14 18:51 UTC
CWE
- CWE-401 - Missing Release of Memory after Effective Lifetime
Assigner
References
13 references
Impacted products
2 products
| Vendor | Product | Version | CPE status | |
|---|---|---|---|---|
| Linux | Linux |
Affected:
b9a24bb76bf611a5268ceffe04219e6ad264559b , < 53af9c793f644d5841d84d8e0ad83bd7ab47f3e0
(git)
Affected: b9a24bb76bf611a5268ceffe04219e6ad264559b , < 01d0d2b8b4e3cf2110baba9371c0c3d04ad5c77b (git) Affected: b9a24bb76bf611a5268ceffe04219e6ad264559b , < 55ac68b53f1cea1926ee2313afc5d66b91daad71 (git) Affected: b9a24bb76bf611a5268ceffe04219e6ad264559b , < 7a6fb69bbcb21e9ce13bdf18c008c268874f0480 (git) Affected: b9a24bb76bf611a5268ceffe04219e6ad264559b , < b314f6c3512108d7a656c5caf07c82d1bbbdc0f1 (git) Affected: b9a24bb76bf611a5268ceffe04219e6ad264559b , < 18c3fa7a7fdbb4d21dafc8a7710ae2c1680930f6 (git) Affected: b9a24bb76bf611a5268ceffe04219e6ad264559b , < 6c55953e232ea668731091d111066521f3b7719b (git) Affected: b9a24bb76bf611a5268ceffe04219e6ad264559b , < 7c183dc0af472dec33d2c0786a5e356baa8cad19 (git) Affected: b9a24bb76bf611a5268ceffe04219e6ad264559b , < c4de6057e7c6654983acb63d939d26ac0d7bbf39 (git) Affected: b9a24bb76bf611a5268ceffe04219e6ad264559b , < facc4405e8b7407e03216207b1d1d640127de0c8 (git) Affected: b9a24bb76bf611a5268ceffe04219e6ad264559b , < 3abebc503a5148072052c229c6b04b329a420ecd (git) Affected: b9a24bb76bf611a5268ceffe04219e6ad264559b , < 399ab7fe0fa0d846881685fd4e57e9a8ef7559f7 (git) Affected: b9a24bb76bf611a5268ceffe04219e6ad264559b , < 372ae77cf11d11fb118cbe2d37def9dd5f826abd (git) |
guessed | |
| Linux | Linux |
Affected:
4.9
Unaffected: 0 , < 4.9 (semver) Unaffected: 4.14.308 , ≤ 4.14.* (semver) Unaffected: 4.19.276 , ≤ 4.19.* (semver) Unaffected: 5.4.229 , ≤ 5.4.* (semver) Unaffected: 5.4.235 , ≤ 5.4.* (semver) Unaffected: 5.10.163 , ≤ 5.10.* (semver) Unaffected: 5.10.173 , ≤ 5.10.* (semver) Unaffected: 5.15.87 , ≤ 5.15.* (semver) Unaffected: 5.15.100 , ≤ 5.15.* (semver) Unaffected: 6.0.19 , ≤ 6.0.* (semver) Unaffected: 6.1.5 , ≤ 6.1.* (semver) Unaffected: 6.1.18 , ≤ 6.1.* (semver) Unaffected: 6.2.5 , ≤ 6.2.* (semver) Unaffected: 6.2 , ≤ * (original_commit_for_fix) |
guessed |
{
"containers": {
"adp": [
{
"metrics": [
{
"cvssV3_1": {
"attackComplexity": "LOW",
"attackVector": "LOCAL",
"availabilityImpact": "HIGH",
"baseScore": 5.5,
"baseSeverity": "MEDIUM",
"confidentialityImpact": "NONE",
"integrityImpact": "NONE",
"privilegesRequired": "LOW",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
"version": "3.1"
}
},
{
"other": {
"content": {
"id": "CVE-2022-50396",
"options": [
{
"Exploitation": "none"
},
{
"Automatable": "no"
},
{
"Technical Impact": "partial"
}
],
"role": "CISA Coordinator",
"timestamp": "2026-01-14T18:51:54.692006Z",
"version": "2.0.3"
},
"type": "ssvc"
}
}
],
"problemTypes": [
{
"descriptions": [
{
"cweId": "CWE-401",
"description": "CWE-401 Missing Release of Memory after Effective Lifetime",
"lang": "en",
"type": "CWE"
}
]
}
],
"providerMetadata": {
"dateUpdated": "2026-01-14T18:53:06.184Z",
"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"shortName": "CISA-ADP"
},
"title": "CISA ADP Vulnrichment"
}
],
"cna": {
"affected": [
{
"defaultStatus": "unaffected",
"product": "Linux",
"programFiles": [
"net/sched/cls_tcindex.c"
],
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"versions": [
{
"lessThan": "53af9c793f644d5841d84d8e0ad83bd7ab47f3e0",
"status": "affected",
"version": "b9a24bb76bf611a5268ceffe04219e6ad264559b",
"versionType": "git"
},
{
"lessThan": "01d0d2b8b4e3cf2110baba9371c0c3d04ad5c77b",
"status": "affected",
"version": "b9a24bb76bf611a5268ceffe04219e6ad264559b",
"versionType": "git"
},
{
"lessThan": "55ac68b53f1cea1926ee2313afc5d66b91daad71",
"status": "affected",
"version": "b9a24bb76bf611a5268ceffe04219e6ad264559b",
"versionType": "git"
},
{
"lessThan": "7a6fb69bbcb21e9ce13bdf18c008c268874f0480",
"status": "affected",
"version": "b9a24bb76bf611a5268ceffe04219e6ad264559b",
"versionType": "git"
},
{
"lessThan": "b314f6c3512108d7a656c5caf07c82d1bbbdc0f1",
"status": "affected",
"version": "b9a24bb76bf611a5268ceffe04219e6ad264559b",
"versionType": "git"
},
{
"lessThan": "18c3fa7a7fdbb4d21dafc8a7710ae2c1680930f6",
"status": "affected",
"version": "b9a24bb76bf611a5268ceffe04219e6ad264559b",
"versionType": "git"
},
{
"lessThan": "6c55953e232ea668731091d111066521f3b7719b",
"status": "affected",
"version": "b9a24bb76bf611a5268ceffe04219e6ad264559b",
"versionType": "git"
},
{
"lessThan": "7c183dc0af472dec33d2c0786a5e356baa8cad19",
"status": "affected",
"version": "b9a24bb76bf611a5268ceffe04219e6ad264559b",
"versionType": "git"
},
{
"lessThan": "c4de6057e7c6654983acb63d939d26ac0d7bbf39",
"status": "affected",
"version": "b9a24bb76bf611a5268ceffe04219e6ad264559b",
"versionType": "git"
},
{
"lessThan": "facc4405e8b7407e03216207b1d1d640127de0c8",
"status": "affected",
"version": "b9a24bb76bf611a5268ceffe04219e6ad264559b",
"versionType": "git"
},
{
"lessThan": "3abebc503a5148072052c229c6b04b329a420ecd",
"status": "affected",
"version": "b9a24bb76bf611a5268ceffe04219e6ad264559b",
"versionType": "git"
},
{
"lessThan": "399ab7fe0fa0d846881685fd4e57e9a8ef7559f7",
"status": "affected",
"version": "b9a24bb76bf611a5268ceffe04219e6ad264559b",
"versionType": "git"
},
{
"lessThan": "372ae77cf11d11fb118cbe2d37def9dd5f826abd",
"status": "affected",
"version": "b9a24bb76bf611a5268ceffe04219e6ad264559b",
"versionType": "git"
}
]
},
{
"defaultStatus": "affected",
"product": "Linux",
"programFiles": [
"net/sched/cls_tcindex.c"
],
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"versions": [
{
"status": "affected",
"version": "4.9"
},
{
"lessThan": "4.9",
"status": "unaffected",
"version": "0",
"versionType": "semver"
},
{
"lessThanOrEqual": "4.14.*",
"status": "unaffected",
"version": "4.14.308",
"versionType": "semver"
},
{
"lessThanOrEqual": "4.19.*",
"status": "unaffected",
"version": "4.19.276",
"versionType": "semver"
},
{
"lessThanOrEqual": "5.4.*",
"status": "unaffected",
"version": "5.4.229",
"versionType": "semver"
},
{
"lessThanOrEqual": "5.4.*",
"status": "unaffected",
"version": "5.4.235",
"versionType": "semver"
},
{
"lessThanOrEqual": "5.10.*",
"status": "unaffected",
"version": "5.10.163",
"versionType": "semver"
},
{
"lessThanOrEqual": "5.10.*",
"status": "unaffected",
"version": "5.10.173",
"versionType": "semver"
},
{
"lessThanOrEqual": "5.15.*",
"status": "unaffected",
"version": "5.15.87",
"versionType": "semver"
},
{
"lessThanOrEqual": "5.15.*",
"status": "unaffected",
"version": "5.15.100",
"versionType": "semver"
},
{
"lessThanOrEqual": "6.0.*",
"status": "unaffected",
"version": "6.0.19",
"versionType": "semver"
},
{
"lessThanOrEqual": "6.1.*",
"status": "unaffected",
"version": "6.1.5",
"versionType": "semver"
},
{
"lessThanOrEqual": "6.1.*",
"status": "unaffected",
"version": "6.1.18",
"versionType": "semver"
},
{
"lessThanOrEqual": "6.2.*",
"status": "unaffected",
"version": "6.2.5",
"versionType": "semver"
},
{
"lessThanOrEqual": "*",
"status": "unaffected",
"version": "6.2",
"versionType": "original_commit_for_fix"
}
]
}
],
"cpeApplicability": [
{
"nodes": [
{
"cpeMatch": [
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "4.14.308",
"versionStartIncluding": "4.9",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "4.19.276",
"versionStartIncluding": "4.9",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "5.4.229",
"versionStartIncluding": "4.9",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "5.4.235",
"versionStartIncluding": "4.9",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "5.10.163",
"versionStartIncluding": "4.9",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "5.10.173",
"versionStartIncluding": "4.9",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "5.15.87",
"versionStartIncluding": "4.9",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "5.15.100",
"versionStartIncluding": "4.9",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "6.0.19",
"versionStartIncluding": "4.9",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "6.1.5",
"versionStartIncluding": "4.9",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "6.1.18",
"versionStartIncluding": "4.9",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "6.2",
"versionStartIncluding": "4.9",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "6.2.5",
"versionStartIncluding": "4.9",
"vulnerable": true
}
],
"negate": false,
"operator": "OR"
}
]
}
],
"descriptions": [
{
"lang": "en",
"value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet: sched: fix memory leak in tcindex_set_parms\n\nSyzkaller reports a memory leak as follows:\n====================================\nBUG: memory leak\nunreferenced object 0xffff88810c287f00 (size 256):\n comm \"syz-executor105\", pid 3600, jiffies 4294943292 (age 12.990s)\n hex dump (first 32 bytes):\n 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................\n 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................\n backtrace:\n [\u003cffffffff814cf9f0\u003e] kmalloc_trace+0x20/0x90 mm/slab_common.c:1046\n [\u003cffffffff839c9e07\u003e] kmalloc include/linux/slab.h:576 [inline]\n [\u003cffffffff839c9e07\u003e] kmalloc_array include/linux/slab.h:627 [inline]\n [\u003cffffffff839c9e07\u003e] kcalloc include/linux/slab.h:659 [inline]\n [\u003cffffffff839c9e07\u003e] tcf_exts_init include/net/pkt_cls.h:250 [inline]\n [\u003cffffffff839c9e07\u003e] tcindex_set_parms+0xa7/0xbe0 net/sched/cls_tcindex.c:342\n [\u003cffffffff839caa1f\u003e] tcindex_change+0xdf/0x120 net/sched/cls_tcindex.c:553\n [\u003cffffffff8394db62\u003e] tc_new_tfilter+0x4f2/0x1100 net/sched/cls_api.c:2147\n [\u003cffffffff8389e91c\u003e] rtnetlink_rcv_msg+0x4dc/0x5d0 net/core/rtnetlink.c:6082\n [\u003cffffffff839eba67\u003e] netlink_rcv_skb+0x87/0x1d0 net/netlink/af_netlink.c:2540\n [\u003cffffffff839eab87\u003e] netlink_unicast_kernel net/netlink/af_netlink.c:1319 [inline]\n [\u003cffffffff839eab87\u003e] netlink_unicast+0x397/0x4c0 net/netlink/af_netlink.c:1345\n [\u003cffffffff839eb046\u003e] netlink_sendmsg+0x396/0x710 net/netlink/af_netlink.c:1921\n [\u003cffffffff8383e796\u003e] sock_sendmsg_nosec net/socket.c:714 [inline]\n [\u003cffffffff8383e796\u003e] sock_sendmsg+0x56/0x80 net/socket.c:734\n [\u003cffffffff8383eb08\u003e] ____sys_sendmsg+0x178/0x410 net/socket.c:2482\n [\u003cffffffff83843678\u003e] ___sys_sendmsg+0xa8/0x110 net/socket.c:2536\n [\u003cffffffff838439c5\u003e] __sys_sendmmsg+0x105/0x330 net/socket.c:2622\n [\u003cffffffff83843c14\u003e] __do_sys_sendmmsg net/socket.c:2651 [inline]\n [\u003cffffffff83843c14\u003e] __se_sys_sendmmsg net/socket.c:2648 [inline]\n [\u003cffffffff83843c14\u003e] __x64_sys_sendmmsg+0x24/0x30 net/socket.c:2648\n [\u003cffffffff84605fd5\u003e] do_syscall_x64 arch/x86/entry/common.c:50 [inline]\n [\u003cffffffff84605fd5\u003e] do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80\n [\u003cffffffff84800087\u003e] entry_SYSCALL_64_after_hwframe+0x63/0xcd\n====================================\n\nKernel uses tcindex_change() to change an existing\nfilter properties.\n\nYet the problem is that, during the process of changing,\nif `old_r` is retrieved from `p-\u003eperfect`, then\nkernel uses tcindex_alloc_perfect_hash() to newly\nallocate filter results, uses tcindex_filter_result_init()\nto clear the old filter result, without destroying\nits tcf_exts structure, which triggers the above memory leak.\n\nTo be more specific, there are only two source for the `old_r`,\naccording to the tcindex_lookup(). `old_r` is retrieved from\n`p-\u003eperfect`, or `old_r` is retrieved from `p-\u003eh`.\n\n * If `old_r` is retrieved from `p-\u003eperfect`, kernel uses\ntcindex_alloc_perfect_hash() to newly allocate the\nfilter results. Then `r` is assigned with `cp-\u003eperfect + handle`,\nwhich is newly allocated. So condition `old_r \u0026\u0026 old_r != r` is\ntrue in this situation, and kernel uses tcindex_filter_result_init()\nto clear the old filter result, without destroying\nits tcf_exts structure\n\n * If `old_r` is retrieved from `p-\u003eh`, then `p-\u003eperfect` is NULL\naccording to the tcindex_lookup(). Considering that `cp-\u003eh`\nis directly copied from `p-\u003eh` and `p-\u003eperfect` is NULL,\n`r` is assigned with `tcindex_lookup(cp, handle)`, whose value\nshould be the same as `old_r`, so condition `old_r \u0026\u0026 old_r != r`\nis false in this situation, kernel ignores using\ntcindex_filter_result_init() to clear the old filter result.\n\nSo only when `old_r` is retrieved from `p-\u003eperfect` does kernel use\ntcindex_filter_result_init() to clear the old filter result, which\ntriggers the above memory leak.\n\nConsidering that there already exists a tc_filter_wq workqueue\nto destroy the old tcindex_d\n---truncated---"
}
],
"providerMetadata": {
"dateUpdated": "2026-05-11T19:18:43.526Z",
"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"shortName": "Linux"
},
"references": [
{
"url": "https://git.kernel.org/stable/c/53af9c793f644d5841d84d8e0ad83bd7ab47f3e0"
},
{
"url": "https://git.kernel.org/stable/c/01d0d2b8b4e3cf2110baba9371c0c3d04ad5c77b"
},
{
"url": "https://git.kernel.org/stable/c/55ac68b53f1cea1926ee2313afc5d66b91daad71"
},
{
"url": "https://git.kernel.org/stable/c/7a6fb69bbcb21e9ce13bdf18c008c268874f0480"
},
{
"url": "https://git.kernel.org/stable/c/b314f6c3512108d7a656c5caf07c82d1bbbdc0f1"
},
{
"url": "https://git.kernel.org/stable/c/18c3fa7a7fdbb4d21dafc8a7710ae2c1680930f6"
},
{
"url": "https://git.kernel.org/stable/c/6c55953e232ea668731091d111066521f3b7719b"
},
{
"url": "https://git.kernel.org/stable/c/7c183dc0af472dec33d2c0786a5e356baa8cad19"
},
{
"url": "https://git.kernel.org/stable/c/c4de6057e7c6654983acb63d939d26ac0d7bbf39"
},
{
"url": "https://git.kernel.org/stable/c/facc4405e8b7407e03216207b1d1d640127de0c8"
},
{
"url": "https://git.kernel.org/stable/c/3abebc503a5148072052c229c6b04b329a420ecd"
},
{
"url": "https://git.kernel.org/stable/c/399ab7fe0fa0d846881685fd4e57e9a8ef7559f7"
},
{
"url": "https://git.kernel.org/stable/c/372ae77cf11d11fb118cbe2d37def9dd5f826abd"
}
],
"title": "net: sched: fix memory leak in tcindex_set_parms",
"x_generator": {
"engine": "bippy-1.2.0"
}
}
},
"cveMetadata": {
"assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"assignerShortName": "Linux",
"cveId": "CVE-2022-50396",
"datePublished": "2025-09-18T13:33:14.450Z",
"dateReserved": "2025-09-17T14:53:06.998Z",
"dateUpdated": "2026-05-11T19:18:43.526Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.2",
"vulnerability-lookup:meta": {
"epss": {
"cve": "CVE-2022-50396",
"date": "2026-09-28",
"epss": "0.0017",
"percentile": "0.05656"
},
"nvd": {
"cve": {
"affected": [
{
"affectedData": [
{
"defaultStatus": "unaffected",
"product": "Linux",
"programFiles": [
"net/sched/cls_tcindex.c"
],
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"versions": [
{
"lessThan": "53af9c793f644d5841d84d8e0ad83bd7ab47f3e0",
"status": "affected",
"version": "b9a24bb76bf611a5268ceffe04219e6ad264559b",
"versionType": "git"
},
{
"lessThan": "01d0d2b8b4e3cf2110baba9371c0c3d04ad5c77b",
"status": "affected",
"version": "b9a24bb76bf611a5268ceffe04219e6ad264559b",
"versionType": "git"
},
{
"lessThan": "55ac68b53f1cea1926ee2313afc5d66b91daad71",
"status": "affected",
"version": "b9a24bb76bf611a5268ceffe04219e6ad264559b",
"versionType": "git"
},
{
"lessThan": "7a6fb69bbcb21e9ce13bdf18c008c268874f0480",
"status": "affected",
"version": "b9a24bb76bf611a5268ceffe04219e6ad264559b",
"versionType": "git"
},
{
"lessThan": "b314f6c3512108d7a656c5caf07c82d1bbbdc0f1",
"status": "affected",
"version": "b9a24bb76bf611a5268ceffe04219e6ad264559b",
"versionType": "git"
},
{
"lessThan": "18c3fa7a7fdbb4d21dafc8a7710ae2c1680930f6",
"status": "affected",
"version": "b9a24bb76bf611a5268ceffe04219e6ad264559b",
"versionType": "git"
},
{
"lessThan": "6c55953e232ea668731091d111066521f3b7719b",
"status": "affected",
"version": "b9a24bb76bf611a5268ceffe04219e6ad264559b",
"versionType": "git"
},
{
"lessThan": "7c183dc0af472dec33d2c0786a5e356baa8cad19",
"status": "affected",
"version": "b9a24bb76bf611a5268ceffe04219e6ad264559b",
"versionType": "git"
},
{
"lessThan": "c4de6057e7c6654983acb63d939d26ac0d7bbf39",
"status": "affected",
"version": "b9a24bb76bf611a5268ceffe04219e6ad264559b",
"versionType": "git"
},
{
"lessThan": "facc4405e8b7407e03216207b1d1d640127de0c8",
"status": "affected",
"version": "b9a24bb76bf611a5268ceffe04219e6ad264559b",
"versionType": "git"
},
{
"lessThan": "3abebc503a5148072052c229c6b04b329a420ecd",
"status": "affected",
"version": "b9a24bb76bf611a5268ceffe04219e6ad264559b",
"versionType": "git"
},
{
"lessThan": "399ab7fe0fa0d846881685fd4e57e9a8ef7559f7",
"status": "affected",
"version": "b9a24bb76bf611a5268ceffe04219e6ad264559b",
"versionType": "git"
},
{
"lessThan": "372ae77cf11d11fb118cbe2d37def9dd5f826abd",
"status": "affected",
"version": "b9a24bb76bf611a5268ceffe04219e6ad264559b",
"versionType": "git"
}
]
},
{
"defaultStatus": "affected",
"product": "Linux",
"programFiles": [
"net/sched/cls_tcindex.c"
],
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"versions": [
{
"status": "affected",
"version": "4.9"
},
{
"lessThan": "4.9",
"status": "unaffected",
"version": "0",
"versionType": "semver"
},
{
"lessThanOrEqual": "4.14.*",
"status": "unaffected",
"version": "4.14.308",
"versionType": "semver"
},
{
"lessThanOrEqual": "4.19.*",
"status": "unaffected",
"version": "4.19.276",
"versionType": "semver"
},
{
"lessThanOrEqual": "5.4.*",
"status": "unaffected",
"version": "5.4.229",
"versionType": "semver"
},
{
"lessThanOrEqual": "5.4.*",
"status": "unaffected",
"version": "5.4.235",
"versionType": "semver"
},
{
"lessThanOrEqual": "5.10.*",
"status": "unaffected",
"version": "5.10.163",
"versionType": "semver"
},
{
"lessThanOrEqual": "5.10.*",
"status": "unaffected",
"version": "5.10.173",
"versionType": "semver"
},
{
"lessThanOrEqual": "5.15.*",
"status": "unaffected",
"version": "5.15.87",
"versionType": "semver"
},
{
"lessThanOrEqual": "5.15.*",
"status": "unaffected",
"version": "5.15.100",
"versionType": "semver"
},
{
"lessThanOrEqual": "6.0.*",
"status": "unaffected",
"version": "6.0.19",
"versionType": "semver"
},
{
"lessThanOrEqual": "6.1.*",
"status": "unaffected",
"version": "6.1.5",
"versionType": "semver"
},
{
"lessThanOrEqual": "6.1.*",
"status": "unaffected",
"version": "6.1.18",
"versionType": "semver"
},
{
"lessThanOrEqual": "6.2.*",
"status": "unaffected",
"version": "6.2.5",
"versionType": "semver"
},
{
"lessThanOrEqual": "*",
"status": "unaffected",
"version": "6.2",
"versionType": "original_commit_for_fix"
}
]
}
],
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
}
],
"configurations": [
{
"nodes": [
{
"cpeMatch": [
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"matchCriteriaId": "7292C460-000B-4120-B05D-5672751A14E4",
"versionEndExcluding": "4.14.308",
"versionStartIncluding": "4.9",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"matchCriteriaId": "C902FC54-DDBD-4DA6-BFEF-26889A267464",
"versionEndExcluding": "4.19.276",
"versionStartIncluding": "4.15",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"matchCriteriaId": "13DD5E68-8CB4-46EE-9A8F-C7F6C1A84430",
"versionEndExcluding": "5.4.235",
"versionStartIncluding": "4.20",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"matchCriteriaId": "4D810CFB-B7C5-493C-B98A-0D5F0D8A47B6",
"versionEndExcluding": "5.10.173",
"versionStartIncluding": "5.5",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"matchCriteriaId": "6D7E5BB5-018B-46B7-A2C4-1ADB75099822",
"versionEndExcluding": "5.15.100",
"versionStartIncluding": "5.11",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"matchCriteriaId": "B70FF53F-1F99-4483-9376-CBA1A4EE0351",
"versionEndExcluding": "6.0.19",
"versionStartIncluding": "5.16",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"matchCriteriaId": "E5630603-E179-4468-AD0D-45FD417E6EDB",
"versionEndExcluding": "6.1.18",
"versionStartIncluding": "6.1",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"matchCriteriaId": "0575B33B-A320-4E51-84CA-10C937341E02",
"versionEndExcluding": "6.2.5",
"versionStartIncluding": "6.2",
"vulnerable": true
}
],
"negate": false,
"operator": "OR"
}
]
}
],
"cveTags": [],
"descriptions": [
{
"lang": "en",
"value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet: sched: fix memory leak in tcindex_set_parms\n\nSyzkaller reports a memory leak as follows:\n====================================\nBUG: memory leak\nunreferenced object 0xffff88810c287f00 (size 256):\n comm \"syz-executor105\", pid 3600, jiffies 4294943292 (age 12.990s)\n hex dump (first 32 bytes):\n 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................\n 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................\n backtrace:\n [\u003cffffffff814cf9f0\u003e] kmalloc_trace+0x20/0x90 mm/slab_common.c:1046\n [\u003cffffffff839c9e07\u003e] kmalloc include/linux/slab.h:576 [inline]\n [\u003cffffffff839c9e07\u003e] kmalloc_array include/linux/slab.h:627 [inline]\n [\u003cffffffff839c9e07\u003e] kcalloc include/linux/slab.h:659 [inline]\n [\u003cffffffff839c9e07\u003e] tcf_exts_init include/net/pkt_cls.h:250 [inline]\n [\u003cffffffff839c9e07\u003e] tcindex_set_parms+0xa7/0xbe0 net/sched/cls_tcindex.c:342\n [\u003cffffffff839caa1f\u003e] tcindex_change+0xdf/0x120 net/sched/cls_tcindex.c:553\n [\u003cffffffff8394db62\u003e] tc_new_tfilter+0x4f2/0x1100 net/sched/cls_api.c:2147\n [\u003cffffffff8389e91c\u003e] rtnetlink_rcv_msg+0x4dc/0x5d0 net/core/rtnetlink.c:6082\n [\u003cffffffff839eba67\u003e] netlink_rcv_skb+0x87/0x1d0 net/netlink/af_netlink.c:2540\n [\u003cffffffff839eab87\u003e] netlink_unicast_kernel net/netlink/af_netlink.c:1319 [inline]\n [\u003cffffffff839eab87\u003e] netlink_unicast+0x397/0x4c0 net/netlink/af_netlink.c:1345\n [\u003cffffffff839eb046\u003e] netlink_sendmsg+0x396/0x710 net/netlink/af_netlink.c:1921\n [\u003cffffffff8383e796\u003e] sock_sendmsg_nosec net/socket.c:714 [inline]\n [\u003cffffffff8383e796\u003e] sock_sendmsg+0x56/0x80 net/socket.c:734\n [\u003cffffffff8383eb08\u003e] ____sys_sendmsg+0x178/0x410 net/socket.c:2482\n [\u003cffffffff83843678\u003e] ___sys_sendmsg+0xa8/0x110 net/socket.c:2536\n [\u003cffffffff838439c5\u003e] __sys_sendmmsg+0x105/0x330 net/socket.c:2622\n [\u003cffffffff83843c14\u003e] __do_sys_sendmmsg net/socket.c:2651 [inline]\n [\u003cffffffff83843c14\u003e] __se_sys_sendmmsg net/socket.c:2648 [inline]\n [\u003cffffffff83843c14\u003e] __x64_sys_sendmmsg+0x24/0x30 net/socket.c:2648\n [\u003cffffffff84605fd5\u003e] do_syscall_x64 arch/x86/entry/common.c:50 [inline]\n [\u003cffffffff84605fd5\u003e] do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80\n [\u003cffffffff84800087\u003e] entry_SYSCALL_64_after_hwframe+0x63/0xcd\n====================================\n\nKernel uses tcindex_change() to change an existing\nfilter properties.\n\nYet the problem is that, during the process of changing,\nif `old_r` is retrieved from `p-\u003eperfect`, then\nkernel uses tcindex_alloc_perfect_hash() to newly\nallocate filter results, uses tcindex_filter_result_init()\nto clear the old filter result, without destroying\nits tcf_exts structure, which triggers the above memory leak.\n\nTo be more specific, there are only two source for the `old_r`,\naccording to the tcindex_lookup(). `old_r` is retrieved from\n`p-\u003eperfect`, or `old_r` is retrieved from `p-\u003eh`.\n\n * If `old_r` is retrieved from `p-\u003eperfect`, kernel uses\ntcindex_alloc_perfect_hash() to newly allocate the\nfilter results. Then `r` is assigned with `cp-\u003eperfect + handle`,\nwhich is newly allocated. So condition `old_r \u0026\u0026 old_r != r` is\ntrue in this situation, and kernel uses tcindex_filter_result_init()\nto clear the old filter result, without destroying\nits tcf_exts structure\n\n * If `old_r` is retrieved from `p-\u003eh`, then `p-\u003eperfect` is NULL\naccording to the tcindex_lookup(). Considering that `cp-\u003eh`\nis directly copied from `p-\u003eh` and `p-\u003eperfect` is NULL,\n`r` is assigned with `tcindex_lookup(cp, handle)`, whose value\nshould be the same as `old_r`, so condition `old_r \u0026\u0026 old_r != r`\nis false in this situation, kernel ignores using\ntcindex_filter_result_init() to clear the old filter result.\n\nSo only when `old_r` is retrieved from `p-\u003eperfect` does kernel use\ntcindex_filter_result_init() to clear the old filter result, which\ntriggers the above memory leak.\n\nConsidering that there already exists a tc_filter_wq workqueue\nto destroy the old tcindex_d\n---truncated---"
}
],
"id": "CVE-2022-50396",
"lastModified": "2026-06-17T05:23:26.860",
"metrics": {
"cvssMetricV31": [
{
"cvssData": {
"attackComplexity": "LOW",
"attackVector": "LOCAL",
"availabilityImpact": "HIGH",
"baseScore": 5.5,
"baseSeverity": "MEDIUM",
"confidentialityImpact": "NONE",
"integrityImpact": "NONE",
"privilegesRequired": "LOW",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
"version": "3.1"
},
"exploitabilityScore": 1.8,
"impactScore": 3.6,
"source": "nvd@nist.gov",
"type": "Primary"
},
{
"cvssData": {
"attackComplexity": "LOW",
"attackVector": "LOCAL",
"availabilityImpact": "HIGH",
"baseScore": 5.5,
"baseSeverity": "MEDIUM",
"confidentialityImpact": "NONE",
"integrityImpact": "NONE",
"privilegesRequired": "LOW",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
"version": "3.1"
},
"exploitabilityScore": 1.8,
"impactScore": 3.6,
"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"type": "Secondary"
}
],
"ssvcV203": [
{
"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"ssvcData": {
"id": "CVE-2022-50396",
"options": [
{
"exploitation": "none"
},
{
"automatable": "no"
},
{
"technicalImpact": "partial"
}
],
"role": "CISA Coordinator",
"timestamp": "2026-01-14T18:51:54.692006Z",
"version": "2.0.3"
}
}
]
},
"published": "2025-09-18T14:15:38.737",
"references": [
{
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"tags": [
"Patch"
],
"url": "https://git.kernel.org/stable/c/01d0d2b8b4e3cf2110baba9371c0c3d04ad5c77b"
},
{
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"tags": [
"Patch"
],
"url": "https://git.kernel.org/stable/c/18c3fa7a7fdbb4d21dafc8a7710ae2c1680930f6"
},
{
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"tags": [
"Patch"
],
"url": "https://git.kernel.org/stable/c/372ae77cf11d11fb118cbe2d37def9dd5f826abd"
},
{
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"tags": [
"Patch"
],
"url": "https://git.kernel.org/stable/c/399ab7fe0fa0d846881685fd4e57e9a8ef7559f7"
},
{
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"tags": [
"Patch"
],
"url": "https://git.kernel.org/stable/c/3abebc503a5148072052c229c6b04b329a420ecd"
},
{
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"tags": [
"Patch"
],
"url": "https://git.kernel.org/stable/c/53af9c793f644d5841d84d8e0ad83bd7ab47f3e0"
},
{
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"tags": [
"Patch"
],
"url": "https://git.kernel.org/stable/c/55ac68b53f1cea1926ee2313afc5d66b91daad71"
},
{
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"tags": [
"Patch"
],
"url": "https://git.kernel.org/stable/c/6c55953e232ea668731091d111066521f3b7719b"
},
{
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"tags": [
"Patch"
],
"url": "https://git.kernel.org/stable/c/7a6fb69bbcb21e9ce13bdf18c008c268874f0480"
},
{
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"tags": [
"Patch"
],
"url": "https://git.kernel.org/stable/c/7c183dc0af472dec33d2c0786a5e356baa8cad19"
},
{
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"tags": [
"Patch"
],
"url": "https://git.kernel.org/stable/c/b314f6c3512108d7a656c5caf07c82d1bbbdc0f1"
},
{
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"tags": [
"Patch"
],
"url": "https://git.kernel.org/stable/c/c4de6057e7c6654983acb63d939d26ac0d7bbf39"
},
{
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"tags": [
"Patch"
],
"url": "https://git.kernel.org/stable/c/facc4405e8b7407e03216207b1d1d640127de0c8"
}
],
"sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"vulnStatus": "Modified",
"weaknesses": [
{
"description": [
{
"lang": "en",
"value": "CWE-401"
}
],
"source": "nvd@nist.gov",
"type": "Primary"
},
{
"description": [
{
"lang": "en",
"value": "CWE-401"
}
],
"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"type": "Secondary"
}
]
}
},
"redhat_vex": {
"aggregate_severity": "Moderate",
"current_release_date": "2026-06-29T21:49:21+00:00",
"cve": "CVE-2022-50396",
"id": "CVE-2022-50396",
"initial_release_date": "2022-01-01T00:00:00+00:00",
"product_status:fixed": "450",
"product_status:known_affected": "80",
"product_status:known_not_affected": "76",
"source": "Red Hat CSAF VEX",
"status": "final",
"title": "kernel: net: sched: fix memory leak in tcindex_set_parms",
"url": "https://security.access.redhat.com/data/csaf/v2/vex/2022/cve-2022-50396.json",
"version": "3"
},
"suse_vex": {
"aggregate_severity": "moderate",
"current_release_date": "2026-08-29T02:21:27Z",
"cve": "CVE-2022-50396",
"id": "CVE-2022-50396",
"initial_release_date": "2025-09-18T23:43:14Z",
"product_status:known_affected": "592",
"product_status:known_not_affected": "175",
"product_status:recommended": "162",
"source": "SUSE CSAF VEX",
"status": "interim",
"title": "SUSE CVE CVE-2022-50396",
"url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2022-50396.json",
"version": "36"
},
"vulnrichment": {
"containers": {
"adp": [
{
"metrics": [
{
"cvssV3_1": {
"attackComplexity": "LOW",
"attackVector": "LOCAL",
"availabilityImpact": "HIGH",
"baseScore": 5.5,
"baseSeverity": "MEDIUM",
"confidentialityImpact": "NONE",
"integrityImpact": "NONE",
"privilegesRequired": "LOW",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
"version": "3.1"
}
},
{
"other": {
"content": {
"id": "CVE-2022-50396",
"options": [
{
"Exploitation": "none"
},
{
"Automatable": "no"
},
{
"Technical Impact": "partial"
}
],
"role": "CISA Coordinator",
"timestamp": "2026-01-14T18:51:54.692006Z",
"version": "2.0.3"
},
"type": "ssvc"
}
}
],
"problemTypes": [
{
"descriptions": [
{
"cweId": "CWE-401",
"description": "CWE-401 Missing Release of Memory after Effective Lifetime",
"lang": "en",
"type": "CWE"
}
]
}
],
"providerMetadata": {
"dateUpdated": "2026-01-14T18:51:50.361Z",
"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"shortName": "CISA-ADP"
},
"title": "CISA ADP Vulnrichment"
}
],
"cna": {
"affected": [
{
"defaultStatus": "unaffected",
"product": "Linux",
"programFiles": [
"net/sched/cls_tcindex.c"
],
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"versions": [
{
"lessThan": "53af9c793f644d5841d84d8e0ad83bd7ab47f3e0",
"status": "affected",
"version": "b9a24bb76bf611a5268ceffe04219e6ad264559b",
"versionType": "git"
},
{
"lessThan": "01d0d2b8b4e3cf2110baba9371c0c3d04ad5c77b",
"status": "affected",
"version": "b9a24bb76bf611a5268ceffe04219e6ad264559b",
"versionType": "git"
},
{
"lessThan": "55ac68b53f1cea1926ee2313afc5d66b91daad71",
"status": "affected",
"version": "b9a24bb76bf611a5268ceffe04219e6ad264559b",
"versionType": "git"
},
{
"lessThan": "7a6fb69bbcb21e9ce13bdf18c008c268874f0480",
"status": "affected",
"version": "b9a24bb76bf611a5268ceffe04219e6ad264559b",
"versionType": "git"
},
{
"lessThan": "b314f6c3512108d7a656c5caf07c82d1bbbdc0f1",
"status": "affected",
"version": "b9a24bb76bf611a5268ceffe04219e6ad264559b",
"versionType": "git"
},
{
"lessThan": "18c3fa7a7fdbb4d21dafc8a7710ae2c1680930f6",
"status": "affected",
"version": "b9a24bb76bf611a5268ceffe04219e6ad264559b",
"versionType": "git"
},
{
"lessThan": "6c55953e232ea668731091d111066521f3b7719b",
"status": "affected",
"version": "b9a24bb76bf611a5268ceffe04219e6ad264559b",
"versionType": "git"
},
{
"lessThan": "7c183dc0af472dec33d2c0786a5e356baa8cad19",
"status": "affected",
"version": "b9a24bb76bf611a5268ceffe04219e6ad264559b",
"versionType": "git"
},
{
"lessThan": "c4de6057e7c6654983acb63d939d26ac0d7bbf39",
"status": "affected",
"version": "b9a24bb76bf611a5268ceffe04219e6ad264559b",
"versionType": "git"
},
{
"lessThan": "facc4405e8b7407e03216207b1d1d640127de0c8",
"status": "affected",
"version": "b9a24bb76bf611a5268ceffe04219e6ad264559b",
"versionType": "git"
},
{
"lessThan": "3abebc503a5148072052c229c6b04b329a420ecd",
"status": "affected",
"version": "b9a24bb76bf611a5268ceffe04219e6ad264559b",
"versionType": "git"
},
{
"lessThan": "399ab7fe0fa0d846881685fd4e57e9a8ef7559f7",
"status": "affected",
"version": "b9a24bb76bf611a5268ceffe04219e6ad264559b",
"versionType": "git"
},
{
"lessThan": "372ae77cf11d11fb118cbe2d37def9dd5f826abd",
"status": "affected",
"version": "b9a24bb76bf611a5268ceffe04219e6ad264559b",
"versionType": "git"
}
]
},
{
"defaultStatus": "affected",
"product": "Linux",
"programFiles": [
"net/sched/cls_tcindex.c"
],
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"versions": [
{
"status": "affected",
"version": "4.9"
},
{
"lessThan": "4.9",
"status": "unaffected",
"version": "0",
"versionType": "semver"
},
{
"lessThanOrEqual": "4.14.*",
"status": "unaffected",
"version": "4.14.308",
"versionType": "semver"
},
{
"lessThanOrEqual": "4.19.*",
"status": "unaffected",
"version": "4.19.276",
"versionType": "semver"
},
{
"lessThanOrEqual": "5.4.*",
"status": "unaffected",
"version": "5.4.229",
"versionType": "semver"
},
{
"lessThanOrEqual": "5.4.*",
"status": "unaffected",
"version": "5.4.235",
"versionType": "semver"
},
{
"lessThanOrEqual": "5.10.*",
"status": "unaffected",
"version": "5.10.163",
"versionType": "semver"
},
{
"lessThanOrEqual": "5.10.*",
"status": "unaffected",
"version": "5.10.173",
"versionType": "semver"
},
{
"lessThanOrEqual": "5.15.*",
"status": "unaffected",
"version": "5.15.87",
"versionType": "semver"
},
{
"lessThanOrEqual": "5.15.*",
"status": "unaffected",
"version": "5.15.100",
"versionType": "semver"
},
{
"lessThanOrEqual": "6.0.*",
"status": "unaffected",
"version": "6.0.19",
"versionType": "semver"
},
{
"lessThanOrEqual": "6.1.*",
"status": "unaffected",
"version": "6.1.5",
"versionType": "semver"
},
{
"lessThanOrEqual": "6.1.*",
"status": "unaffected",
"version": "6.1.18",
"versionType": "semver"
},
{
"lessThanOrEqual": "6.2.*",
"status": "unaffected",
"version": "6.2.5",
"versionType": "semver"
},
{
"lessThanOrEqual": "*",
"status": "unaffected",
"version": "6.2",
"versionType": "original_commit_for_fix"
}
]
}
],
"cpeApplicability": [
{
"nodes": [
{
"cpeMatch": [
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "4.14.308",
"versionStartIncluding": "4.9",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "4.19.276",
"versionStartIncluding": "4.9",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "5.4.229",
"versionStartIncluding": "4.9",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "5.4.235",
"versionStartIncluding": "4.9",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "5.10.163",
"versionStartIncluding": "4.9",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "5.10.173",
"versionStartIncluding": "4.9",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "5.15.87",
"versionStartIncluding": "4.9",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "5.15.100",
"versionStartIncluding": "4.9",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "6.0.19",
"versionStartIncluding": "4.9",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "6.1.5",
"versionStartIncluding": "4.9",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "6.1.18",
"versionStartIncluding": "4.9",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "6.2",
"versionStartIncluding": "4.9",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "6.2.5",
"versionStartIncluding": "4.9",
"vulnerable": true
}
],
"negate": false,
"operator": "OR"
}
]
}
],
"descriptions": [
{
"lang": "en",
"value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet: sched: fix memory leak in tcindex_set_parms\n\nSyzkaller reports a memory leak as follows:\n====================================\nBUG: memory leak\nunreferenced object 0xffff88810c287f00 (size 256):\n comm \"syz-executor105\", pid 3600, jiffies 4294943292 (age 12.990s)\n hex dump (first 32 bytes):\n 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................\n 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................\n backtrace:\n [\u003cffffffff814cf9f0\u003e] kmalloc_trace+0x20/0x90 mm/slab_common.c:1046\n [\u003cffffffff839c9e07\u003e] kmalloc include/linux/slab.h:576 [inline]\n [\u003cffffffff839c9e07\u003e] kmalloc_array include/linux/slab.h:627 [inline]\n [\u003cffffffff839c9e07\u003e] kcalloc include/linux/slab.h:659 [inline]\n [\u003cffffffff839c9e07\u003e] tcf_exts_init include/net/pkt_cls.h:250 [inline]\n [\u003cffffffff839c9e07\u003e] tcindex_set_parms+0xa7/0xbe0 net/sched/cls_tcindex.c:342\n [\u003cffffffff839caa1f\u003e] tcindex_change+0xdf/0x120 net/sched/cls_tcindex.c:553\n [\u003cffffffff8394db62\u003e] tc_new_tfilter+0x4f2/0x1100 net/sched/cls_api.c:2147\n [\u003cffffffff8389e91c\u003e] rtnetlink_rcv_msg+0x4dc/0x5d0 net/core/rtnetlink.c:6082\n [\u003cffffffff839eba67\u003e] netlink_rcv_skb+0x87/0x1d0 net/netlink/af_netlink.c:2540\n [\u003cffffffff839eab87\u003e] netlink_unicast_kernel net/netlink/af_netlink.c:1319 [inline]\n [\u003cffffffff839eab87\u003e] netlink_unicast+0x397/0x4c0 net/netlink/af_netlink.c:1345\n [\u003cffffffff839eb046\u003e] netlink_sendmsg+0x396/0x710 net/netlink/af_netlink.c:1921\n [\u003cffffffff8383e796\u003e] sock_sendmsg_nosec net/socket.c:714 [inline]\n [\u003cffffffff8383e796\u003e] sock_sendmsg+0x56/0x80 net/socket.c:734\n [\u003cffffffff8383eb08\u003e] ____sys_sendmsg+0x178/0x410 net/socket.c:2482\n [\u003cffffffff83843678\u003e] ___sys_sendmsg+0xa8/0x110 net/socket.c:2536\n [\u003cffffffff838439c5\u003e] __sys_sendmmsg+0x105/0x330 net/socket.c:2622\n [\u003cffffffff83843c14\u003e] __do_sys_sendmmsg net/socket.c:2651 [inline]\n [\u003cffffffff83843c14\u003e] __se_sys_sendmmsg net/socket.c:2648 [inline]\n [\u003cffffffff83843c14\u003e] __x64_sys_sendmmsg+0x24/0x30 net/socket.c:2648\n [\u003cffffffff84605fd5\u003e] do_syscall_x64 arch/x86/entry/common.c:50 [inline]\n [\u003cffffffff84605fd5\u003e] do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80\n [\u003cffffffff84800087\u003e] entry_SYSCALL_64_after_hwframe+0x63/0xcd\n====================================\n\nKernel uses tcindex_change() to change an existing\nfilter properties.\n\nYet the problem is that, during the process of changing,\nif `old_r` is retrieved from `p-\u003eperfect`, then\nkernel uses tcindex_alloc_perfect_hash() to newly\nallocate filter results, uses tcindex_filter_result_init()\nto clear the old filter result, without destroying\nits tcf_exts structure, which triggers the above memory leak.\n\nTo be more specific, there are only two source for the `old_r`,\naccording to the tcindex_lookup(). `old_r` is retrieved from\n`p-\u003eperfect`, or `old_r` is retrieved from `p-\u003eh`.\n\n * If `old_r` is retrieved from `p-\u003eperfect`, kernel uses\ntcindex_alloc_perfect_hash() to newly allocate the\nfilter results. Then `r` is assigned with `cp-\u003eperfect + handle`,\nwhich is newly allocated. So condition `old_r \u0026\u0026 old_r != r` is\ntrue in this situation, and kernel uses tcindex_filter_result_init()\nto clear the old filter result, without destroying\nits tcf_exts structure\n\n * If `old_r` is retrieved from `p-\u003eh`, then `p-\u003eperfect` is NULL\naccording to the tcindex_lookup(). Considering that `cp-\u003eh`\nis directly copied from `p-\u003eh` and `p-\u003eperfect` is NULL,\n`r` is assigned with `tcindex_lookup(cp, handle)`, whose value\nshould be the same as `old_r`, so condition `old_r \u0026\u0026 old_r != r`\nis false in this situation, kernel ignores using\ntcindex_filter_result_init() to clear the old filter result.\n\nSo only when `old_r` is retrieved from `p-\u003eperfect` does kernel use\ntcindex_filter_result_init() to clear the old filter result, which\ntriggers the above memory leak.\n\nConsidering that there already exists a tc_filter_wq workqueue\nto destroy the old tcindex_d\n---truncated---"
}
],
"providerMetadata": {
"dateUpdated": "2026-05-11T19:18:43.526Z",
"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"shortName": "Linux"
},
"references": [
{
"url": "https://git.kernel.org/stable/c/53af9c793f644d5841d84d8e0ad83bd7ab47f3e0"
},
{
"url": "https://git.kernel.org/stable/c/01d0d2b8b4e3cf2110baba9371c0c3d04ad5c77b"
},
{
"url": "https://git.kernel.org/stable/c/55ac68b53f1cea1926ee2313afc5d66b91daad71"
},
{
"url": "https://git.kernel.org/stable/c/7a6fb69bbcb21e9ce13bdf18c008c268874f0480"
},
{
"url": "https://git.kernel.org/stable/c/b314f6c3512108d7a656c5caf07c82d1bbbdc0f1"
},
{
"url": "https://git.kernel.org/stable/c/18c3fa7a7fdbb4d21dafc8a7710ae2c1680930f6"
},
{
"url": "https://git.kernel.org/stable/c/6c55953e232ea668731091d111066521f3b7719b"
},
{
"url": "https://git.kernel.org/stable/c/7c183dc0af472dec33d2c0786a5e356baa8cad19"
},
{
"url": "https://git.kernel.org/stable/c/c4de6057e7c6654983acb63d939d26ac0d7bbf39"
},
{
"url": "https://git.kernel.org/stable/c/facc4405e8b7407e03216207b1d1d640127de0c8"
},
{
"url": "https://git.kernel.org/stable/c/3abebc503a5148072052c229c6b04b329a420ecd"
},
{
"url": "https://git.kernel.org/stable/c/399ab7fe0fa0d846881685fd4e57e9a8ef7559f7"
},
{
"url": "https://git.kernel.org/stable/c/372ae77cf11d11fb118cbe2d37def9dd5f826abd"
}
],
"title": "net: sched: fix memory leak in tcindex_set_parms",
"x_generator": {
"engine": "bippy-1.2.0"
}
}
},
"cveMetadata": {
"assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"assignerShortName": "Linux",
"cveId": "CVE-2022-50396",
"datePublished": "2025-09-18T13:33:14.450Z",
"dateReserved": "2025-09-17T14:53:06.998Z",
"dateUpdated": "2026-05-11T19:18:43.526Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.2"
}
}
}
Loading…
Loading…
Experimental. This forecast is provided for visualization only and may change without notice. Do not use it for operational decisions.
Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.
Sightings
| Author | Source | Type | Date | Other |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or observed by the user.
- Confirmed: The vulnerability has been validated from an analyst's perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
- Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
- Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
- Not confirmed: The user expressed doubt about the validity of the vulnerability.
- Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.
Loading…
Loading…
The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the
vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base
model, served locally by ML-Gateway.
They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.
Loading…
Related by attack behaviour
Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.
Loading…