CVE-2026-31714 (GCVE-0-2026-31714)
Vulnerability from cvelistv5 – Published: 2026-05-01 13:56 – Updated: 2026-05-01 13:56
VLAI?
Title
f2fs: fix to avoid memory leak in f2fs_rename()
Summary
In the Linux kernel, the following vulnerability has been resolved:
f2fs: fix to avoid memory leak in f2fs_rename()
syzbot reported a f2fs bug as below:
BUG: memory leak
unreferenced object 0xffff888127f70830 (size 16):
comm "syz.0.23", pid 6144, jiffies 4294943712
hex dump (first 16 bytes):
3c af 57 72 5b e6 8f ad 6e 8e fd 33 42 39 03 ff <.Wr[...n..3B9..
backtrace (crc 925f8a80):
kmemleak_alloc_recursive include/linux/kmemleak.h:44 [inline]
slab_post_alloc_hook mm/slub.c:4520 [inline]
slab_alloc_node mm/slub.c:4844 [inline]
__do_kmalloc_node mm/slub.c:5237 [inline]
__kmalloc_noprof+0x3bd/0x560 mm/slub.c:5250
kmalloc_noprof include/linux/slab.h:954 [inline]
fscrypt_setup_filename+0x15e/0x3b0 fs/crypto/fname.c:364
f2fs_setup_filename+0x52/0xb0 fs/f2fs/dir.c:143
f2fs_rename+0x159/0xca0 fs/f2fs/namei.c:961
f2fs_rename2+0xd5/0xf20 fs/f2fs/namei.c:1308
vfs_rename+0x7ff/0x1250 fs/namei.c:6026
filename_renameat2+0x4f4/0x660 fs/namei.c:6144
__do_sys_renameat2 fs/namei.c:6173 [inline]
__se_sys_renameat2 fs/namei.c:6168 [inline]
__x64_sys_renameat2+0x59/0x80 fs/namei.c:6168
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0xe2/0xf80 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
The root cause is in commit 40b2d55e0452 ("f2fs: fix to create selinux
label during whiteout initialization"), we added a call to
f2fs_setup_filename() without a matching call to f2fs_free_filename(),
fix it.
Severity ?
No CVSS data available.
Assigner
References
Impacted products
| Vendor | Product | Version | ||
|---|---|---|---|---|
| Linux | Linux |
Affected:
7525dec4b34c80b3015c3f2ac143fd2bfc1febc3 , < a76c1cad4e80a9802ef8048662255417e3ce5b79
(git)
Affected: 40b2d55e045222dd6de2a54a299f682e0f954b03 , < c78206dcb912ab60b8ee3cbe8c48d749a9a12e1e (git) Affected: 40b2d55e045222dd6de2a54a299f682e0f954b03 , < 047c0aef6af37a2a35181aa085c616ad286386f1 (git) Affected: 40b2d55e045222dd6de2a54a299f682e0f954b03 , < 369eb2016d8e2f01931b3bad1cb9cefa83f44003 (git) Affected: 40b2d55e045222dd6de2a54a299f682e0f954b03 , < 3cf11e6f36c170050c12171dd6fd3142711478fc (git) Affected: 1d1b89c9846e6a550eca3d2ce9323fb591e4f321 (git) Affected: 64582cc5357cd984724cfb0835b4a34d9c279d31 (git) |
||
{
"containers": {
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{
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{
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{
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"status": "unaffected",
"version": "0",
"versionType": "semver"
},
{
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"status": "unaffected",
"version": "6.6.136",
"versionType": "semver"
},
{
"lessThanOrEqual": "6.12.*",
"status": "unaffected",
"version": "6.12.84",
"versionType": "semver"
},
{
"lessThanOrEqual": "6.18.*",
"status": "unaffected",
"version": "6.18.25",
"versionType": "semver"
},
{
"lessThanOrEqual": "7.0.*",
"status": "unaffected",
"version": "7.0.2",
"versionType": "semver"
},
{
"lessThanOrEqual": "*",
"status": "unaffected",
"version": "7.1-rc1",
"versionType": "original_commit_for_fix"
}
]
}
],
"cpeApplicability": [
{
"nodes": [
{
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{
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"vulnerable": true
},
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},
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}
],
"negate": false,
"operator": "OR"
}
]
}
],
"descriptions": [
{
"lang": "en",
"value": "In the Linux kernel, the following vulnerability has been resolved:\n\nf2fs: fix to avoid memory leak in f2fs_rename()\n\nsyzbot reported a f2fs bug as below:\n\nBUG: memory leak\nunreferenced object 0xffff888127f70830 (size 16):\n comm \"syz.0.23\", pid 6144, jiffies 4294943712\n hex dump (first 16 bytes):\n 3c af 57 72 5b e6 8f ad 6e 8e fd 33 42 39 03 ff \u003c.Wr[...n..3B9..\n backtrace (crc 925f8a80):\n kmemleak_alloc_recursive include/linux/kmemleak.h:44 [inline]\n slab_post_alloc_hook mm/slub.c:4520 [inline]\n slab_alloc_node mm/slub.c:4844 [inline]\n __do_kmalloc_node mm/slub.c:5237 [inline]\n __kmalloc_noprof+0x3bd/0x560 mm/slub.c:5250\n kmalloc_noprof include/linux/slab.h:954 [inline]\n fscrypt_setup_filename+0x15e/0x3b0 fs/crypto/fname.c:364\n f2fs_setup_filename+0x52/0xb0 fs/f2fs/dir.c:143\n f2fs_rename+0x159/0xca0 fs/f2fs/namei.c:961\n f2fs_rename2+0xd5/0xf20 fs/f2fs/namei.c:1308\n vfs_rename+0x7ff/0x1250 fs/namei.c:6026\n filename_renameat2+0x4f4/0x660 fs/namei.c:6144\n __do_sys_renameat2 fs/namei.c:6173 [inline]\n __se_sys_renameat2 fs/namei.c:6168 [inline]\n __x64_sys_renameat2+0x59/0x80 fs/namei.c:6168\n do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]\n do_syscall_64+0xe2/0xf80 arch/x86/entry/syscall_64.c:94\n entry_SYSCALL_64_after_hwframe+0x77/0x7f\n\nThe root cause is in commit 40b2d55e0452 (\"f2fs: fix to create selinux\nlabel during whiteout initialization\"), we added a call to\nf2fs_setup_filename() without a matching call to f2fs_free_filename(),\nfix it."
}
],
"providerMetadata": {
"dateUpdated": "2026-05-01T13:56:09.925Z",
"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"shortName": "Linux"
},
"references": [
{
"url": "https://git.kernel.org/stable/c/a76c1cad4e80a9802ef8048662255417e3ce5b79"
},
{
"url": "https://git.kernel.org/stable/c/c78206dcb912ab60b8ee3cbe8c48d749a9a12e1e"
},
{
"url": "https://git.kernel.org/stable/c/047c0aef6af37a2a35181aa085c616ad286386f1"
},
{
"url": "https://git.kernel.org/stable/c/369eb2016d8e2f01931b3bad1cb9cefa83f44003"
},
{
"url": "https://git.kernel.org/stable/c/3cf11e6f36c170050c12171dd6fd3142711478fc"
}
],
"title": "f2fs: fix to avoid memory leak in f2fs_rename()",
"x_generator": {
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}
}
},
"cveMetadata": {
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"assignerShortName": "Linux",
"cveId": "CVE-2026-31714",
"datePublished": "2026-05-01T13:56:09.925Z",
"dateReserved": "2026-03-09T15:48:24.133Z",
"dateUpdated": "2026-05-01T13:56:09.925Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.2",
"vulnerability-lookup:meta": {
"epss": {
"cve": "CVE-2026-31714",
"date": "2026-05-05",
"epss": "0.00018",
"percentile": "0.04829"
},
"nvd": "{\"cve\":{\"id\":\"CVE-2026-31714\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2026-05-01T14:16:21.493\",\"lastModified\":\"2026-05-01T15:24:14.893\",\"vulnStatus\":\"Awaiting Analysis\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"In the Linux kernel, the following vulnerability has been resolved:\\n\\nf2fs: fix to avoid memory leak in f2fs_rename()\\n\\nsyzbot reported a f2fs bug as below:\\n\\nBUG: memory leak\\nunreferenced object 0xffff888127f70830 (size 16):\\n comm \\\"syz.0.23\\\", pid 6144, jiffies 4294943712\\n hex dump (first 16 bytes):\\n 3c af 57 72 5b e6 8f ad 6e 8e fd 33 42 39 03 ff \u003c.Wr[...n..3B9..\\n backtrace (crc 925f8a80):\\n kmemleak_alloc_recursive include/linux/kmemleak.h:44 [inline]\\n slab_post_alloc_hook mm/slub.c:4520 [inline]\\n slab_alloc_node mm/slub.c:4844 [inline]\\n __do_kmalloc_node mm/slub.c:5237 [inline]\\n __kmalloc_noprof+0x3bd/0x560 mm/slub.c:5250\\n kmalloc_noprof include/linux/slab.h:954 [inline]\\n fscrypt_setup_filename+0x15e/0x3b0 fs/crypto/fname.c:364\\n f2fs_setup_filename+0x52/0xb0 fs/f2fs/dir.c:143\\n f2fs_rename+0x159/0xca0 fs/f2fs/namei.c:961\\n f2fs_rename2+0xd5/0xf20 fs/f2fs/namei.c:1308\\n vfs_rename+0x7ff/0x1250 fs/namei.c:6026\\n filename_renameat2+0x4f4/0x660 fs/namei.c:6144\\n __do_sys_renameat2 fs/namei.c:6173 [inline]\\n __se_sys_renameat2 fs/namei.c:6168 [inline]\\n __x64_sys_renameat2+0x59/0x80 fs/namei.c:6168\\n do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]\\n do_syscall_64+0xe2/0xf80 arch/x86/entry/syscall_64.c:94\\n entry_SYSCALL_64_after_hwframe+0x77/0x7f\\n\\nThe root cause is in commit 40b2d55e0452 (\\\"f2fs: fix to create selinux\\nlabel during whiteout initialization\\\"), we added a call to\\nf2fs_setup_filename() without a matching call to f2fs_free_filename(),\\nfix it.\"}],\"metrics\":{},\"references\":[{\"url\":\"https://git.kernel.org/stable/c/047c0aef6af37a2a35181aa085c616ad286386f1\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/369eb2016d8e2f01931b3bad1cb9cefa83f44003\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/3cf11e6f36c170050c12171dd6fd3142711478fc\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/a76c1cad4e80a9802ef8048662255417e3ce5b79\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/c78206dcb912ab60b8ee3cbe8c48d749a9a12e1e\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"}]}}"
}
}
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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.
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