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CVE-2024-46771 (GCVE-0-2024-46771)

Vulnerability from cvelistv5 – Published: 2024-09-18 07:12 – Updated: 2026-08-05 11:38
VLAI
Title
can: bcm: Remove proc entry when dev is unregistered.
Summary
In the Linux kernel, the following vulnerability has been resolved: can: bcm: Remove proc entry when dev is unregistered. syzkaller reported a warning in bcm_connect() below. [0] The repro calls connect() to vxcan1, removes vxcan1, and calls connect() with ifindex == 0. Calling connect() for a BCM socket allocates a proc entry. Then, bcm_sk(sk)->bound is set to 1 to prevent further connect(). However, removing the bound device resets bcm_sk(sk)->bound to 0 in bcm_notify(). The 2nd connect() tries to allocate a proc entry with the same name and sets NULL to bcm_sk(sk)->bcm_proc_read, leaking the original proc entry. Since the proc entry is available only for connect()ed sockets, let's clean up the entry when the bound netdev is unregistered. [0]: proc_dir_entry 'can-bcm/2456' already registered WARNING: CPU: 1 PID: 394 at fs/proc/generic.c:376 proc_register+0x645/0x8f0 fs/proc/generic.c:375 Modules linked in: CPU: 1 PID: 394 Comm: syz-executor403 Not tainted 6.10.0-rc7-g852e42cc2dd4 Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014 RIP: 0010:proc_register+0x645/0x8f0 fs/proc/generic.c:375 Code: 00 00 00 00 00 48 85 ed 0f 85 97 02 00 00 4d 85 f6 0f 85 9f 02 00 00 48 c7 c7 9b cb cf 87 48 89 de 4c 89 fa e8 1c 6f eb fe 90 <0f> 0b 90 90 48 c7 c7 98 37 99 89 e8 cb 7e 22 05 bb 00 00 00 10 48 RSP: 0018:ffa0000000cd7c30 EFLAGS: 00010246 RAX: 9e129be1950f0200 RBX: ff1100011b51582c RCX: ff1100011857cd80 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000002 RBP: 0000000000000000 R08: ffd400000000000f R09: ff1100013e78cac0 R10: ffac800000cd7980 R11: ff1100013e12b1f0 R12: 0000000000000000 R13: 0000000000000000 R14: 0000000000000000 R15: ff1100011a99a2ec FS: 00007fbd7086f740(0000) GS:ff1100013fd00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00000000200071c0 CR3: 0000000118556004 CR4: 0000000000771ef0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe07f0 DR7: 0000000000000400 PKRU: 55555554 Call Trace: <TASK> proc_create_net_single+0x144/0x210 fs/proc/proc_net.c:220 bcm_connect+0x472/0x840 net/can/bcm.c:1673 __sys_connect_file net/socket.c:2049 [inline] __sys_connect+0x5d2/0x690 net/socket.c:2066 __do_sys_connect net/socket.c:2076 [inline] __se_sys_connect net/socket.c:2073 [inline] __x64_sys_connect+0x8f/0x100 net/socket.c:2073 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xd9/0x1c0 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x4b/0x53 RIP: 0033:0x7fbd708b0e5d Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 90 f3 0f 1e fa 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 8b 0d 73 9f 1b 00 f7 d8 64 89 01 48 RSP: 002b:00007fff8cd33f08 EFLAGS: 00000246 ORIG_RAX: 000000000000002a RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 00007fbd708b0e5d RDX: 0000000000000010 RSI: 0000000020000040 RDI: 0000000000000003 RBP: 0000000000000000 R08: 0000000000000040 R09: 0000000000000040 R10: 0000000000000040 R11: 0000000000000246 R12: 00007fff8cd34098 R13: 0000000000401280 R14: 0000000000406de8 R15: 00007fbd70ab9000 </TASK> remove_proc_entry: removing non-empty directory 'net/can-bcm', leaking at least '2456'
Severity
7.8 (High)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
SSVC
Exploitation: none Automatable: no Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2024-09-29 14:40 UTC
Assigner
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: ffd980f976e7fd666c2e61bf8ab35107efd11828 , < 5c680022c4e28ba18ea500f3e29f0428271afa92 (git)
Affected: ffd980f976e7fd666c2e61bf8ab35107efd11828 , < 33ed4ba73caae39f34ab874ba79138badc2c65dd (git)
Affected: ffd980f976e7fd666c2e61bf8ab35107efd11828 , < aec92dbebdbec7567d9f56d7c9296a572b8fd849 (git)
Affected: ffd980f976e7fd666c2e61bf8ab35107efd11828 , < 10bfacbd5e8d821011d857bee73310457c9c989a (git)
Affected: ffd980f976e7fd666c2e61bf8ab35107efd11828 , < 3b39dc2901aa7a679a5ca981a3de9f8d5658afe8 (git)
Affected: ffd980f976e7fd666c2e61bf8ab35107efd11828 , < 4377b79323df62eb5d310354f19b4d130ff58d50 (git)
Affected: ffd980f976e7fd666c2e61bf8ab35107efd11828 , < abb0a615569ec008e8a93d9f3ab2d5b418ea94d4 (git)
Affected: ffd980f976e7fd666c2e61bf8ab35107efd11828 , < 76fe372ccb81b0c89b6cd2fec26e2f38c958be85 (git)
guessed Create a notification for this product.
Linux Linux Affected: 2.6.25
Unaffected: 0 , < 2.6.25 (semver)
Unaffected: 4.19.322 , ≤ 4.19.* (semver)
Unaffected: 5.4.284 , ≤ 5.4.* (semver)
Unaffected: 5.10.226 , ≤ 5.10.* (semver)
Unaffected: 5.15.167 , ≤ 5.15.* (semver)
Unaffected: 6.1.110 , ≤ 6.1.* (semver)
Unaffected: 6.6.51 , ≤ 6.6.* (semver)
Unaffected: 6.10.10 , ≤ 6.10.* (semver)
Unaffected: 6.11 , ≤ * (original_commit_for_fix)
guessed Create a notification for this product.
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          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ncan: bcm: Remove proc entry when dev is unregistered.\n\nsyzkaller reported a warning in bcm_connect() below. [0]\n\nThe repro calls connect() to vxcan1, removes vxcan1, and calls\nconnect() with ifindex == 0.\n\nCalling connect() for a BCM socket allocates a proc entry.\nThen, bcm_sk(sk)-\u003ebound is set to 1 to prevent further connect().\n\nHowever, removing the bound device resets bcm_sk(sk)-\u003ebound to 0\nin bcm_notify().\n\nThe 2nd connect() tries to allocate a proc entry with the same\nname and sets NULL to bcm_sk(sk)-\u003ebcm_proc_read, leaking the\noriginal proc entry.\n\nSince the proc entry is available only for connect()ed sockets,\nlet\u0027s clean up the entry when the bound netdev is unregistered.\n\n[0]:\nproc_dir_entry \u0027can-bcm/2456\u0027 already registered\nWARNING: CPU: 1 PID: 394 at fs/proc/generic.c:376 proc_register+0x645/0x8f0 fs/proc/generic.c:375\nModules linked in:\nCPU: 1 PID: 394 Comm: syz-executor403 Not tainted 6.10.0-rc7-g852e42cc2dd4\nHardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014\nRIP: 0010:proc_register+0x645/0x8f0 fs/proc/generic.c:375\nCode: 00 00 00 00 00 48 85 ed 0f 85 97 02 00 00 4d 85 f6 0f 85 9f 02 00 00 48 c7 c7 9b cb cf 87 48 89 de 4c 89 fa e8 1c 6f eb fe 90 \u003c0f\u003e 0b 90 90 48 c7 c7 98 37 99 89 e8 cb 7e 22 05 bb 00 00 00 10 48\nRSP: 0018:ffa0000000cd7c30 EFLAGS: 00010246\nRAX: 9e129be1950f0200 RBX: ff1100011b51582c RCX: ff1100011857cd80\nRDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000002\nRBP: 0000000000000000 R08: ffd400000000000f R09: ff1100013e78cac0\nR10: ffac800000cd7980 R11: ff1100013e12b1f0 R12: 0000000000000000\nR13: 0000000000000000 R14: 0000000000000000 R15: ff1100011a99a2ec\nFS:  00007fbd7086f740(0000) GS:ff1100013fd00000(0000) knlGS:0000000000000000\nCS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033\nCR2: 00000000200071c0 CR3: 0000000118556004 CR4: 0000000000771ef0\nDR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000\nDR3: 0000000000000000 DR6: 00000000fffe07f0 DR7: 0000000000000400\nPKRU: 55555554\nCall Trace:\n \u003cTASK\u003e\n proc_create_net_single+0x144/0x210 fs/proc/proc_net.c:220\n bcm_connect+0x472/0x840 net/can/bcm.c:1673\n __sys_connect_file net/socket.c:2049 [inline]\n __sys_connect+0x5d2/0x690 net/socket.c:2066\n __do_sys_connect net/socket.c:2076 [inline]\n __se_sys_connect net/socket.c:2073 [inline]\n __x64_sys_connect+0x8f/0x100 net/socket.c:2073\n do_syscall_x64 arch/x86/entry/common.c:52 [inline]\n do_syscall_64+0xd9/0x1c0 arch/x86/entry/common.c:83\n entry_SYSCALL_64_after_hwframe+0x4b/0x53\nRIP: 0033:0x7fbd708b0e5d\nCode: ff c3 66 2e 0f 1f 84 00 00 00 00 00 90 f3 0f 1e fa 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 \u003c48\u003e 3d 01 f0 ff ff 73 01 c3 48 8b 0d 73 9f 1b 00 f7 d8 64 89 01 48\nRSP: 002b:00007fff8cd33f08 EFLAGS: 00000246 ORIG_RAX: 000000000000002a\nRAX: ffffffffffffffda RBX: 0000000000000003 RCX: 00007fbd708b0e5d\nRDX: 0000000000000010 RSI: 0000000020000040 RDI: 0000000000000003\nRBP: 0000000000000000 R08: 0000000000000040 R09: 0000000000000040\nR10: 0000000000000040 R11: 0000000000000246 R12: 00007fff8cd34098\nR13: 0000000000401280 R14: 0000000000406de8 R15: 00007fbd70ab9000\n \u003c/TASK\u003e\nremove_proc_entry: removing non-empty directory \u0027net/can-bcm\u0027, leaking at least \u00272456\u0027"
        }
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        {
          "cvssV3_1": {
            "baseScore": 7.8,
            "baseSeverity": "HIGH",
            "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
            "version": "3.1"
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            {
              "lang": "en",
              "value": "AV:L - The entire sequence \u2014 CAN_BCM socket creation, connect(), removal of the bound netdev via RTNL, a second connect(), close(), and reading /proc/net/can-bcm/\u003cino\u003e \u2014 requires only local syscalls. No remote or adjacent-network input reaches this code.\nAC:L - The attacker performs a deterministic, self-contained sequence (connect \u2192 delete the interface they created \u2192 connect \u2192 close \u2192 read the leaked proc file); there is no race and no condition outside the attacker\u0027s control.\nPR:L - An ordinary unprivileged user can open a CAN BCM socket (no capability checks in bcm_connect()) and obtain CAP_NET_ADMIN inside a user namespace (`unshare -Urn`) to create and delete the vcan/vxcan device that triggers bcm_notify(); the leaked proc entry is mode 0644 and world-readable.\nUI:N - The attacker drives every step from a single process; no action by another user or administrator is needed.\nS:U - The dangling proc entry and the freed socket are both kernel objects within the same security authority; no VM, IOMMU, or sandbox boundary is crossed.\nC:H - The orphaned procfs entry keeps a pointer to a freed struct sock, so reading it makes bcm_proc_show() dereference and walk lists inside a slab object the attacker can re-allocate with controlled content, yielding an attacker-influenced kernel memory read returned to userspace (plus %pK pointer disclosure).\nI:H - The dangling reference is a use-after-free on a freed socket whose slab can be sprayed with attacker-controlled data; the resulting corrupted-object dereferences and list traversals are the standard basis for control-flow/heap manipulation primitives.\nA:H - The second connect() triggers a proc_register() WARN (fatal with panic_on_warn), and any later read of the leaked entry dereferences freed memory, causing an oops or an endless loop over corrupted list pointers, plus permanent procfs/netns resource leakage."
            }
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        "dateUpdated": "2026-08-05T11:38:28.890Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
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        },
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        },
        {
          "url": "https://git.kernel.org/stable/c/10bfacbd5e8d821011d857bee73310457c9c989a"
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    "datePublished": "2024-09-18T07:12:29.363Z",
    "dateReserved": "2024-09-11T15:12:18.274Z",
    "dateUpdated": "2026-08-05T11:38:28.890Z",
    "state": "PUBLISHED"
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    },
    "fkie_nvd": {
      "configurations": "[{\"nodes\": [{\"operator\": \"OR\", \"negate\": false, \"cpeMatch\": [{\"vulnerable\": true, \"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"versionStartIncluding\": \"2.6.25\", \"versionEndExcluding\": \"4.19.322\", \"matchCriteriaId\": \"FDD41833-5EF3-4E8B-BD2B-83D6DF670AAA\"}, {\"vulnerable\": true, \"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"versionStartIncluding\": \"4.20\", \"versionEndExcluding\": \"5.4.284\", \"matchCriteriaId\": \"6265A402-9C3C-438F-BFC5-4194B2568B85\"}, {\"vulnerable\": true, \"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"versionStartIncluding\": \"5.5\", \"versionEndExcluding\": \"5.10.226\", \"matchCriteriaId\": \"864FC17C-501A-4823-A643-6F35D65D8A97\"}, {\"vulnerable\": true, \"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"versionStartIncluding\": \"5.11\", \"versionEndExcluding\": \"5.15.167\", \"matchCriteriaId\": \"043405A4-25FE-45D4-A7BB-2A0C3B7D17C1\"}, {\"vulnerable\": true, \"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"versionStartIncluding\": \"5.16\", \"versionEndExcluding\": \"6.1.110\", \"matchCriteriaId\": \"6B1A95FC-7E7E-428B-BB59-F76640C652AE\"}, {\"vulnerable\": true, \"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"versionStartIncluding\": \"6.2\", \"versionEndExcluding\": \"6.6.51\", \"matchCriteriaId\": \"E4529134-BAC4-4776-840B-304009E181A0\"}, {\"vulnerable\": true, \"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"versionStartIncluding\": \"6.7\", \"versionEndExcluding\": \"6.10.10\", \"matchCriteriaId\": \"ACDEE48C-137A-4731-90D0-A675865E1BED\"}, {\"vulnerable\": true, \"criteria\": \"cpe:2.3:o:linux:linux_kernel:6.11:rc1:*:*:*:*:*:*\", \"matchCriteriaId\": \"8B3CE743-2126-47A3-8B7C-822B502CF119\"}, {\"vulnerable\": true, \"criteria\": \"cpe:2.3:o:linux:linux_kernel:6.11:rc2:*:*:*:*:*:*\", \"matchCriteriaId\": \"4DEB27E7-30AA-45CC-8934-B89263EF3551\"}, {\"vulnerable\": true, \"criteria\": \"cpe:2.3:o:linux:linux_kernel:6.11:rc3:*:*:*:*:*:*\", \"matchCriteriaId\": \"E0005AEF-856E-47EB-BFE4-90C46899394D\"}, {\"vulnerable\": true, \"criteria\": \"cpe:2.3:o:linux:linux_kernel:6.11:rc4:*:*:*:*:*:*\", \"matchCriteriaId\": \"39889A68-6D34-47A6-82FC-CD0BF23D6754\"}, {\"vulnerable\": true, \"criteria\": \"cpe:2.3:o:linux:linux_kernel:6.11:rc5:*:*:*:*:*:*\", \"matchCriteriaId\": \"B8383ABF-1457-401F-9B61-EE50F4C61F4F\"}, {\"vulnerable\": true, \"criteria\": \"cpe:2.3:o:linux:linux_kernel:6.11:rc6:*:*:*:*:*:*\", \"matchCriteriaId\": \"B77A9280-37E6-49AD-B559-5B23A3B1DC3D\"}]}]}]",
      "descriptions": "[{\"lang\": \"en\", \"value\": \"In the Linux kernel, the following vulnerability has been resolved:\\n\\ncan: bcm: Remove proc entry when dev is unregistered.\\n\\nsyzkaller reported a warning in bcm_connect() below. [0]\\n\\nThe repro calls connect() to vxcan1, removes vxcan1, and calls\\nconnect() with ifindex == 0.\\n\\nCalling connect() for a BCM socket allocates a proc entry.\\nThen, bcm_sk(sk)-\u003ebound is set to 1 to prevent further connect().\\n\\nHowever, removing the bound device resets bcm_sk(sk)-\u003ebound to 0\\nin bcm_notify().\\n\\nThe 2nd connect() tries to allocate a proc entry with the same\\nname and sets NULL to bcm_sk(sk)-\u003ebcm_proc_read, leaking the\\noriginal proc entry.\\n\\nSince the proc entry is available only for connect()ed sockets,\\nlet\u0027s clean up the entry when the bound netdev is unregistered.\\n\\n[0]:\\nproc_dir_entry \u0027can-bcm/2456\u0027 already registered\\nWARNING: CPU: 1 PID: 394 at fs/proc/generic.c:376 proc_register+0x645/0x8f0 fs/proc/generic.c:375\\nModules linked in:\\nCPU: 1 PID: 394 Comm: syz-executor403 Not tainted 6.10.0-rc7-g852e42cc2dd4\\nHardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014\\nRIP: 0010:proc_register+0x645/0x8f0 fs/proc/generic.c:375\\nCode: 00 00 00 00 00 48 85 ed 0f 85 97 02 00 00 4d 85 f6 0f 85 9f 02 00 00 48 c7 c7 9b cb cf 87 48 89 de 4c 89 fa e8 1c 6f eb fe 90 \u003c0f\u003e 0b 90 90 48 c7 c7 98 37 99 89 e8 cb 7e 22 05 bb 00 00 00 10 48\\nRSP: 0018:ffa0000000cd7c30 EFLAGS: 00010246\\nRAX: 9e129be1950f0200 RBX: ff1100011b51582c RCX: ff1100011857cd80\\nRDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000002\\nRBP: 0000000000000000 R08: ffd400000000000f R09: ff1100013e78cac0\\nR10: ffac800000cd7980 R11: ff1100013e12b1f0 R12: 0000000000000000\\nR13: 0000000000000000 R14: 0000000000000000 R15: ff1100011a99a2ec\\nFS:  00007fbd7086f740(0000) GS:ff1100013fd00000(0000) knlGS:0000000000000000\\nCS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033\\nCR2: 00000000200071c0 CR3: 0000000118556004 CR4: 0000000000771ef0\\nDR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000\\nDR3: 0000000000000000 DR6: 00000000fffe07f0 DR7: 0000000000000400\\nPKRU: 55555554\\nCall Trace:\\n \u003cTASK\u003e\\n proc_create_net_single+0x144/0x210 fs/proc/proc_net.c:220\\n bcm_connect+0x472/0x840 net/can/bcm.c:1673\\n __sys_connect_file net/socket.c:2049 [inline]\\n __sys_connect+0x5d2/0x690 net/socket.c:2066\\n __do_sys_connect net/socket.c:2076 [inline]\\n __se_sys_connect net/socket.c:2073 [inline]\\n __x64_sys_connect+0x8f/0x100 net/socket.c:2073\\n do_syscall_x64 arch/x86/entry/common.c:52 [inline]\\n do_syscall_64+0xd9/0x1c0 arch/x86/entry/common.c:83\\n entry_SYSCALL_64_after_hwframe+0x4b/0x53\\nRIP: 0033:0x7fbd708b0e5d\\nCode: ff c3 66 2e 0f 1f 84 00 00 00 00 00 90 f3 0f 1e fa 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 \u003c48\u003e 3d 01 f0 ff ff 73 01 c3 48 8b 0d 73 9f 1b 00 f7 d8 64 89 01 48\\nRSP: 002b:00007fff8cd33f08 EFLAGS: 00000246 ORIG_RAX: 000000000000002a\\nRAX: ffffffffffffffda RBX: 0000000000000003 RCX: 00007fbd708b0e5d\\nRDX: 0000000000000010 RSI: 0000000020000040 RDI: 0000000000000003\\nRBP: 0000000000000000 R08: 0000000000000040 R09: 0000000000000040\\nR10: 0000000000000040 R11: 0000000000000246 R12: 00007fff8cd34098\\nR13: 0000000000401280 R14: 0000000000406de8 R15: 00007fbd70ab9000\\n \u003c/TASK\u003e\\nremove_proc_entry: removing non-empty directory \u0027net/can-bcm\u0027, leaking at least \u00272456\u0027\"}, {\"lang\": \"es\", \"value\": \"En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: can: bcm: Eliminar entrada proc cuando dev no est\\u00e1 registrado. syzkaller inform\\u00f3 una advertencia en bcm_connect() a continuaci\\u00f3n. [0] La repro llama a connect() a vxcan1, elimina vxcan1 y llama a connect() con ifindex == 0. Llamar a connect() para un socket BCM asigna una entrada proc. Luego, bcm_sk(sk)-\u0026gt;bound se establece en 1 para evitar m\\u00e1s connect(). Sin embargo, eliminar el dispositivo vinculado restablece bcm_sk(sk)-\u0026gt;bound a 0 en bcm_notify(). El segundo connect() intenta asignar una entrada proc con el mismo nombre y establece NULL en bcm_sk(sk)-\u0026gt;bcm_proc_read, filtrando la entrada proc original. Dado que la entrada proc solo est\\u00e1 disponible para sockets conectados, limpiemos la entrada cuando el netdev vinculado no est\\u00e9 registrado. [0]: proc_dir_entry \u0027can-bcm/2456\u0027 ya est\\u00e1 registrado ADVERTENCIA: CPU: 1 PID: 394 en fs/proc/generic.c:376 proc_register+0x645/0x8f0 fs/proc/generic.c:375 M\\u00f3dulos vinculados en: CPU: 1 PID: 394 Comm: syz-executor403 No contaminado 6.10.0-rc7-g852e42cc2dd4 Nombre del hardware: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014 RIP: 0010:proc_register+0x645/0x8f0 fs/proc/generic.c:375 C\\u00f3digo: 00 00 00 00 00 48 85 ed 0f 85 97 02 00 00 4d 85 f6 0f 85 9f 02 00 00 48 c7 c7 9b cb cf 87 48 89 de 4c 89 fa e8 1c 6f eb fe 90 \u0026lt;0f\u0026gt; 0b 90 90 48 c7 c7 98 37 99 89 e8 cb 7e 22 05 bb 00 00 00 10 48 RSP: 0018:ffa0000000cd7c30 EFLAGS: 00010246 RAX: 9e129be1950f0200 RBX: ff1100011b51582c RCX: ff1100011857cd80 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000002 RBP: 0000000000000000 R08: ffd400000000000f R09: ff1100013e78cac0 R10: ffac800000cd7980 R11: ff1100013e12b1f0 R12: 0000000000000000 R13: 0000000000000000 R14: 0000000000000000 R15: ff1100011a99a2ec FS: 00007fbd7086f740(0000) GS:ff1100013fd00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00000000200071c0 CR3: 0000000118556004 CR4: 0000000000771ef0 DR0: 0000000000000000 DR1: 00000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe07f0 DR7: 0000000000000400 PKRU: 55555554 Seguimiento de llamadas:  proc_create_net_single+0x144/0x210 fs/proc/proc_net.c:220 bcm_connect+0x472/0x840 net/can/bcm.c:1673 __sys_connect_file net/socket.c:2049 [en l\\u00ednea] __sys_connect+0x5d2/0x690 net/socket.c:2066 __do_sys_connect net/socket.c:2076 [en l\\u00ednea] __se_sys_connect net/socket.c:2073 [en l\\u00ednea] __x64_sys_connect+0x8f/0x100 net/socket.c:2073 do_syscall_x64 arch/x86/entry/common.c:52 [en l\\u00ednea] do_syscall_64+0xd9/0x1c0 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x4b/0x53 RIP: 0033:0x7fbd708b0e5d C\\u00f3digo: ff c3 66 2e 0f 1f 84 00 00 00 00 00 90 f3 0f 1e fa 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 \u0026lt;48\u0026gt; 3d 01 f0 ff ff 73 01 c3 48 8b 0d 73 9f 1b 00 f7 d8 64 89 01 48 RSP: 002b:00007fff8cd33f08 EFLAGS: 00000246 ORIG_RAX: 000000000000002a RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 00007fbd708b0e5d RDX: 0000000000000010 RSI: 0000000020000040 RDI: 0000000000000003 RBP: 0000000000000000 R08: 0000000000000040 R09: 0000000000000040 R10: 0000000000000040 R11: 0000000000000246 R12: 00007fff8cd34098 R13: 0000000000401280 R14: 0000000000406de8 R15: 00007fbd70ab9000  remove_proc_entry: elimina el directorio no vac\\u00edo \u0027net/can-bcm\u0027, filtrando al menos \u00272456\u0027\"}]",
      "id": "CVE-2024-46771",
      "lastModified": "2024-11-20T18:20:03.130",
      "metrics": "{\"cvssMetricV31\": [{\"source\": \"nvd@nist.gov\", \"type\": \"Primary\", \"cvssData\": {\"version\": \"3.1\", \"vectorString\": \"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H\", \"baseScore\": 5.5, \"baseSeverity\": \"MEDIUM\", \"attackVector\": \"LOCAL\", \"attackComplexity\": \"LOW\", \"privilegesRequired\": \"LOW\", \"userInteraction\": \"NONE\", \"scope\": \"UNCHANGED\", \"confidentialityImpact\": \"NONE\", \"integrityImpact\": \"NONE\", \"availabilityImpact\": \"HIGH\"}, \"exploitabilityScore\": 1.8, \"impactScore\": 3.6}]}",
      "published": "2024-09-18T08:15:05.010",
      "references": "[{\"url\": \"https://git.kernel.org/stable/c/10bfacbd5e8d821011d857bee73310457c9c989a\", \"source\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"tags\": [\"Patch\"]}, {\"url\": \"https://git.kernel.org/stable/c/33ed4ba73caae39f34ab874ba79138badc2c65dd\", \"source\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"tags\": [\"Patch\"]}, {\"url\": \"https://git.kernel.org/stable/c/3b39dc2901aa7a679a5ca981a3de9f8d5658afe8\", \"source\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"tags\": [\"Patch\"]}, {\"url\": \"https://git.kernel.org/stable/c/4377b79323df62eb5d310354f19b4d130ff58d50\", \"source\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"tags\": [\"Patch\"]}, {\"url\": \"https://git.kernel.org/stable/c/5c680022c4e28ba18ea500f3e29f0428271afa92\", \"source\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"tags\": [\"Patch\"]}, {\"url\": \"https://git.kernel.org/stable/c/76fe372ccb81b0c89b6cd2fec26e2f38c958be85\", \"source\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"tags\": [\"Patch\"]}, {\"url\": \"https://git.kernel.org/stable/c/abb0a615569ec008e8a93d9f3ab2d5b418ea94d4\", \"source\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"tags\": [\"Patch\"]}, {\"url\": \"https://git.kernel.org/stable/c/aec92dbebdbec7567d9f56d7c9296a572b8fd849\", \"source\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"tags\": [\"Patch\"]}]",
      "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "vulnStatus": "Analyzed",
      "weaknesses": "[{\"source\": \"nvd@nist.gov\", \"type\": \"Primary\", \"description\": [{\"lang\": \"en\", \"value\": \"NVD-CWE-noinfo\"}]}]"
    },
    "nvd": "{\"cve\":{\"id\":\"CVE-2024-46771\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2024-09-18T08:15:05.010\",\"lastModified\":\"2026-08-04T11:20:24.123\",\"vulnStatus\":\"Modified\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"In the Linux kernel, the following vulnerability has been resolved:\\n\\ncan: bcm: Remove proc entry when dev is unregistered.\\n\\nsyzkaller reported a warning in bcm_connect() below. [0]\\n\\nThe repro calls connect() to vxcan1, removes vxcan1, and calls\\nconnect() with ifindex == 0.\\n\\nCalling connect() for a BCM socket allocates a proc entry.\\nThen, bcm_sk(sk)-\u003ebound is set to 1 to prevent further connect().\\n\\nHowever, removing the bound device resets bcm_sk(sk)-\u003ebound to 0\\nin bcm_notify().\\n\\nThe 2nd connect() tries to allocate a proc entry with the same\\nname and sets NULL to bcm_sk(sk)-\u003ebcm_proc_read, leaking the\\noriginal proc entry.\\n\\nSince the proc entry is available only for connect()ed sockets,\\nlet\u0027s clean up the entry when the bound netdev is unregistered.\\n\\n[0]:\\nproc_dir_entry \u0027can-bcm/2456\u0027 already registered\\nWARNING: CPU: 1 PID: 394 at fs/proc/generic.c:376 proc_register+0x645/0x8f0 fs/proc/generic.c:375\\nModules linked in:\\nCPU: 1 PID: 394 Comm: syz-executor403 Not tainted 6.10.0-rc7-g852e42cc2dd4\\nHardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014\\nRIP: 0010:proc_register+0x645/0x8f0 fs/proc/generic.c:375\\nCode: 00 00 00 00 00 48 85 ed 0f 85 97 02 00 00 4d 85 f6 0f 85 9f 02 00 00 48 c7 c7 9b cb cf 87 48 89 de 4c 89 fa e8 1c 6f eb fe 90 \u003c0f\u003e 0b 90 90 48 c7 c7 98 37 99 89 e8 cb 7e 22 05 bb 00 00 00 10 48\\nRSP: 0018:ffa0000000cd7c30 EFLAGS: 00010246\\nRAX: 9e129be1950f0200 RBX: ff1100011b51582c RCX: ff1100011857cd80\\nRDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000002\\nRBP: 0000000000000000 R08: ffd400000000000f R09: ff1100013e78cac0\\nR10: ffac800000cd7980 R11: ff1100013e12b1f0 R12: 0000000000000000\\nR13: 0000000000000000 R14: 0000000000000000 R15: ff1100011a99a2ec\\nFS:  00007fbd7086f740(0000) GS:ff1100013fd00000(0000) knlGS:0000000000000000\\nCS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033\\nCR2: 00000000200071c0 CR3: 0000000118556004 CR4: 0000000000771ef0\\nDR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000\\nDR3: 0000000000000000 DR6: 00000000fffe07f0 DR7: 0000000000000400\\nPKRU: 55555554\\nCall Trace:\\n \u003cTASK\u003e\\n proc_create_net_single+0x144/0x210 fs/proc/proc_net.c:220\\n bcm_connect+0x472/0x840 net/can/bcm.c:1673\\n __sys_connect_file net/socket.c:2049 [inline]\\n __sys_connect+0x5d2/0x690 net/socket.c:2066\\n __do_sys_connect net/socket.c:2076 [inline]\\n __se_sys_connect net/socket.c:2073 [inline]\\n __x64_sys_connect+0x8f/0x100 net/socket.c:2073\\n do_syscall_x64 arch/x86/entry/common.c:52 [inline]\\n do_syscall_64+0xd9/0x1c0 arch/x86/entry/common.c:83\\n entry_SYSCALL_64_after_hwframe+0x4b/0x53\\nRIP: 0033:0x7fbd708b0e5d\\nCode: ff c3 66 2e 0f 1f 84 00 00 00 00 00 90 f3 0f 1e fa 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 \u003c48\u003e 3d 01 f0 ff ff 73 01 c3 48 8b 0d 73 9f 1b 00 f7 d8 64 89 01 48\\nRSP: 002b:00007fff8cd33f08 EFLAGS: 00000246 ORIG_RAX: 000000000000002a\\nRAX: ffffffffffffffda RBX: 0000000000000003 RCX: 00007fbd708b0e5d\\nRDX: 0000000000000010 RSI: 0000000020000040 RDI: 0000000000000003\\nRBP: 0000000000000000 R08: 0000000000000040 R09: 0000000000000040\\nR10: 0000000000000040 R11: 0000000000000246 R12: 00007fff8cd34098\\nR13: 0000000000401280 R14: 0000000000406de8 R15: 00007fbd70ab9000\\n \u003c/TASK\u003e\\nremove_proc_entry: removing non-empty directory \u0027net/can-bcm\u0027, leaking at least \u00272456\u0027\"},{\"lang\":\"es\",\"value\":\"En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: can: bcm: Eliminar entrada proc cuando dev no est\u00e1 registrado. syzkaller inform\u00f3 una advertencia en bcm_connect() a continuaci\u00f3n. [0] La repro llama a connect() a vxcan1, elimina vxcan1 y llama a connect() con ifindex == 0. Llamar a connect() para un socket BCM asigna una entrada proc. Luego, bcm_sk(sk)-\u0026gt;bound se establece en 1 para evitar m\u00e1s connect(). Sin embargo, eliminar el dispositivo vinculado restablece bcm_sk(sk)-\u0026gt;bound a 0 en bcm_notify(). El segundo connect() intenta asignar una entrada proc con el mismo nombre y establece NULL en bcm_sk(sk)-\u0026gt;bcm_proc_read, filtrando la entrada proc original. Dado que la entrada proc solo est\u00e1 disponible para sockets conectados, limpiemos la entrada cuando el netdev vinculado no est\u00e9 registrado. [0]: proc_dir_entry \u0027can-bcm/2456\u0027 ya est\u00e1 registrado ADVERTENCIA: CPU: 1 PID: 394 en fs/proc/generic.c:376 proc_register+0x645/0x8f0 fs/proc/generic.c:375 M\u00f3dulos vinculados en: CPU: 1 PID: 394 Comm: syz-executor403 No contaminado 6.10.0-rc7-g852e42cc2dd4 Nombre del hardware: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014 RIP: 0010:proc_register+0x645/0x8f0 fs/proc/generic.c:375 C\u00f3digo: 00 00 00 00 00 48 85 ed 0f 85 97 02 00 00 4d 85 f6 0f 85 9f 02 00 00 48 c7 c7 9b cb cf 87 48 89 de 4c 89 fa e8 1c 6f eb fe 90 \u0026lt;0f\u0026gt; 0b 90 90 48 c7 c7 98 37 99 89 e8 cb 7e 22 05 bb 00 00 00 10 48 RSP: 0018:ffa0000000cd7c30 EFLAGS: 00010246 RAX: 9e129be1950f0200 RBX: ff1100011b51582c RCX: ff1100011857cd80 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000002 RBP: 0000000000000000 R08: ffd400000000000f R09: ff1100013e78cac0 R10: ffac800000cd7980 R11: ff1100013e12b1f0 R12: 0000000000000000 R13: 0000000000000000 R14: 0000000000000000 R15: ff1100011a99a2ec FS: 00007fbd7086f740(0000) GS:ff1100013fd00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00000000200071c0 CR3: 0000000118556004 CR4: 0000000000771ef0 DR0: 0000000000000000 DR1: 00000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe07f0 DR7: 0000000000000400 PKRU: 55555554 Seguimiento de llamadas:  proc_create_net_single+0x144/0x210 fs/proc/proc_net.c:220 bcm_connect+0x472/0x840 net/can/bcm.c:1673 __sys_connect_file net/socket.c:2049 [en l\u00ednea] __sys_connect+0x5d2/0x690 net/socket.c:2066 __do_sys_connect net/socket.c:2076 [en l\u00ednea] __se_sys_connect net/socket.c:2073 [en l\u00ednea] __x64_sys_connect+0x8f/0x100 net/socket.c:2073 do_syscall_x64 arch/x86/entry/common.c:52 [en l\u00ednea] do_syscall_64+0xd9/0x1c0 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x4b/0x53 RIP: 0033:0x7fbd708b0e5d C\u00f3digo: ff c3 66 2e 0f 1f 84 00 00 00 00 00 90 f3 0f 1e fa 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 \u0026lt;48\u0026gt; 3d 01 f0 ff ff 73 01 c3 48 8b 0d 73 9f 1b 00 f7 d8 64 89 01 48 RSP: 002b:00007fff8cd33f08 EFLAGS: 00000246 ORIG_RAX: 000000000000002a RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 00007fbd708b0e5d RDX: 0000000000000010 RSI: 0000000020000040 RDI: 0000000000000003 RBP: 0000000000000000 R08: 0000000000000040 R09: 0000000000000040 R10: 0000000000000040 R11: 0000000000000246 R12: 00007fff8cd34098 R13: 0000000000401280 R14: 0000000000406de8 R15: 00007fbd70ab9000  remove_proc_entry: elimina el directorio no vac\u00edo \u0027net/can-bcm\u0027, filtrando al menos 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    "redhat_vex": {
      "aggregate_severity": "Moderate",
      "current_release_date": "2026-09-13T09:11:57+00:00",
      "cve": "CVE-2024-46771",
      "id": "CVE-2024-46771",
      "initial_release_date": "2024-09-18T00:00:00+00:00",
      "product_status:known_affected": "198",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "kernel: can: bcm: Remove proc entry when dev is unregistered.",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2024/cve-2024-46771.json",
      "version": "3"
    },
    "suse_vex": {
      "aggregate_severity": "moderate",
      "current_release_date": "2026-08-31T00:32:17Z",
      "cve": "CVE-2024-46771",
      "id": "CVE-2024-46771",
      "initial_release_date": "2024-09-19T03:10:14Z",
      "product_status:known_affected": "675",
      "product_status:known_not_affected": "55",
      "product_status:recommended": "667",
      "source": "SUSE CSAF VEX",
      "status": "interim",
      "title": "SUSE CVE CVE-2024-46771",
      "url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2024-46771.json",
      "version": "73"
    },
    "vulnrichment": {
      "containers": "{\"adp\": [{\"title\": \"CVE Program Container\", \"references\": [{\"url\": \"https://lists.debian.org/debian-lts-announce/2025/01/msg00001.html\"}, {\"url\": \"https://lists.debian.org/debian-lts-announce/2024/10/msg00003.html\"}], \"providerMetadata\": {\"orgId\": \"af854a3a-2127-422b-91ae-364da2661108\", \"shortName\": \"CVE\", \"dateUpdated\": \"2025-11-03T22:18:13.468Z\"}}, {\"title\": \"CISA ADP Vulnrichment\", \"metrics\": [{\"other\": {\"type\": \"ssvc\", \"content\": {\"id\": \"CVE-2024-46771\", \"role\": \"CISA Coordinator\", \"options\": [{\"Exploitation\": \"none\"}, {\"Automatable\": \"no\"}, {\"Technical Impact\": \"partial\"}], \"version\": \"2.0.3\", \"timestamp\": \"2024-09-29T14:40:41.261064Z\"}}}], \"providerMetadata\": {\"orgId\": \"134c704f-9b21-4f2e-91b3-4a467353bcc0\", \"shortName\": \"CISA-ADP\", \"dateUpdated\": \"2024-09-29T14:40:45.697Z\"}}], \"cna\": {\"title\": \"can: bcm: Remove proc entry when dev is unregistered.\", \"affected\": [{\"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\", \"vendor\": \"Linux\", \"product\": \"Linux\", \"versions\": [{\"status\": \"affected\", \"version\": \"ffd980f976e7fd666c2e61bf8ab35107efd11828\", \"lessThan\": \"5c680022c4e28ba18ea500f3e29f0428271afa92\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"ffd980f976e7fd666c2e61bf8ab35107efd11828\", \"lessThan\": \"33ed4ba73caae39f34ab874ba79138badc2c65dd\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"ffd980f976e7fd666c2e61bf8ab35107efd11828\", \"lessThan\": \"aec92dbebdbec7567d9f56d7c9296a572b8fd849\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"ffd980f976e7fd666c2e61bf8ab35107efd11828\", \"lessThan\": \"10bfacbd5e8d821011d857bee73310457c9c989a\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"ffd980f976e7fd666c2e61bf8ab35107efd11828\", \"lessThan\": \"3b39dc2901aa7a679a5ca981a3de9f8d5658afe8\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"ffd980f976e7fd666c2e61bf8ab35107efd11828\", \"lessThan\": \"4377b79323df62eb5d310354f19b4d130ff58d50\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"ffd980f976e7fd666c2e61bf8ab35107efd11828\", \"lessThan\": \"abb0a615569ec008e8a93d9f3ab2d5b418ea94d4\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"ffd980f976e7fd666c2e61bf8ab35107efd11828\", \"lessThan\": \"76fe372ccb81b0c89b6cd2fec26e2f38c958be85\", \"versionType\": \"git\"}], \"programFiles\": [\"net/can/bcm.c\"], \"defaultStatus\": \"unaffected\"}, {\"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\", \"vendor\": \"Linux\", \"product\": \"Linux\", \"versions\": [{\"status\": \"affected\", \"version\": \"2.6.25\"}, {\"status\": \"unaffected\", \"version\": \"0\", \"lessThan\": \"2.6.25\", \"versionType\": \"semver\"}, {\"status\": \"unaffected\", \"version\": \"4.19.322\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"4.19.*\"}, {\"status\": \"unaffected\", \"version\": \"5.4.284\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"5.4.*\"}, {\"status\": \"unaffected\", \"version\": \"5.10.226\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"5.10.*\"}, {\"status\": \"unaffected\", \"version\": \"5.15.167\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"5.15.*\"}, {\"status\": \"unaffected\", \"version\": \"6.1.110\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"6.1.*\"}, {\"status\": \"unaffected\", \"version\": \"6.6.51\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"6.6.*\"}, {\"status\": \"unaffected\", \"version\": \"6.10.10\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"6.10.*\"}, {\"status\": \"unaffected\", \"version\": \"6.11\", \"versionType\": \"original_commit_for_fix\", \"lessThanOrEqual\": \"*\"}], \"programFiles\": [\"net/can/bcm.c\"], \"defaultStatus\": \"affected\"}], \"references\": [{\"url\": \"https://git.kernel.org/stable/c/5c680022c4e28ba18ea500f3e29f0428271afa92\"}, {\"url\": \"https://git.kernel.org/stable/c/33ed4ba73caae39f34ab874ba79138badc2c65dd\"}, {\"url\": \"https://git.kernel.org/stable/c/aec92dbebdbec7567d9f56d7c9296a572b8fd849\"}, {\"url\": \"https://git.kernel.org/stable/c/10bfacbd5e8d821011d857bee73310457c9c989a\"}, {\"url\": \"https://git.kernel.org/stable/c/3b39dc2901aa7a679a5ca981a3de9f8d5658afe8\"}, {\"url\": \"https://git.kernel.org/stable/c/4377b79323df62eb5d310354f19b4d130ff58d50\"}, {\"url\": \"https://git.kernel.org/stable/c/abb0a615569ec008e8a93d9f3ab2d5b418ea94d4\"}, {\"url\": \"https://git.kernel.org/stable/c/76fe372ccb81b0c89b6cd2fec26e2f38c958be85\"}], \"x_generator\": {\"engine\": \"bippy-1.2.0\"}, \"descriptions\": [{\"lang\": \"en\", \"value\": \"In the Linux kernel, the following vulnerability has been resolved:\\n\\ncan: bcm: Remove proc entry when dev is unregistered.\\n\\nsyzkaller reported a warning in bcm_connect() below. [0]\\n\\nThe repro calls connect() to vxcan1, removes vxcan1, and calls\\nconnect() with ifindex == 0.\\n\\nCalling connect() for a BCM socket allocates a proc entry.\\nThen, bcm_sk(sk)-\u003ebound is set to 1 to prevent further connect().\\n\\nHowever, removing the bound device resets bcm_sk(sk)-\u003ebound to 0\\nin bcm_notify().\\n\\nThe 2nd connect() tries to allocate a proc entry with the same\\nname and sets NULL to bcm_sk(sk)-\u003ebcm_proc_read, leaking the\\noriginal proc entry.\\n\\nSince the proc entry is available only for connect()ed sockets,\\nlet\u0027s clean up the entry when the bound netdev is unregistered.\\n\\n[0]:\\nproc_dir_entry \u0027can-bcm/2456\u0027 already registered\\nWARNING: CPU: 1 PID: 394 at fs/proc/generic.c:376 proc_register+0x645/0x8f0 fs/proc/generic.c:375\\nModules linked in:\\nCPU: 1 PID: 394 Comm: syz-executor403 Not tainted 6.10.0-rc7-g852e42cc2dd4\\nHardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014\\nRIP: 0010:proc_register+0x645/0x8f0 fs/proc/generic.c:375\\nCode: 00 00 00 00 00 48 85 ed 0f 85 97 02 00 00 4d 85 f6 0f 85 9f 02 00 00 48 c7 c7 9b cb cf 87 48 89 de 4c 89 fa e8 1c 6f eb fe 90 \u003c0f\u003e 0b 90 90 48 c7 c7 98 37 99 89 e8 cb 7e 22 05 bb 00 00 00 10 48\\nRSP: 0018:ffa0000000cd7c30 EFLAGS: 00010246\\nRAX: 9e129be1950f0200 RBX: ff1100011b51582c RCX: ff1100011857cd80\\nRDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000002\\nRBP: 0000000000000000 R08: ffd400000000000f R09: ff1100013e78cac0\\nR10: ffac800000cd7980 R11: ff1100013e12b1f0 R12: 0000000000000000\\nR13: 0000000000000000 R14: 0000000000000000 R15: ff1100011a99a2ec\\nFS:  00007fbd7086f740(0000) GS:ff1100013fd00000(0000) knlGS:0000000000000000\\nCS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033\\nCR2: 00000000200071c0 CR3: 0000000118556004 CR4: 0000000000771ef0\\nDR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000\\nDR3: 0000000000000000 DR6: 00000000fffe07f0 DR7: 0000000000000400\\nPKRU: 55555554\\nCall Trace:\\n \u003cTASK\u003e\\n proc_create_net_single+0x144/0x210 fs/proc/proc_net.c:220\\n bcm_connect+0x472/0x840 net/can/bcm.c:1673\\n __sys_connect_file net/socket.c:2049 [inline]\\n __sys_connect+0x5d2/0x690 net/socket.c:2066\\n __do_sys_connect net/socket.c:2076 [inline]\\n __se_sys_connect net/socket.c:2073 [inline]\\n __x64_sys_connect+0x8f/0x100 net/socket.c:2073\\n do_syscall_x64 arch/x86/entry/common.c:52 [inline]\\n do_syscall_64+0xd9/0x1c0 arch/x86/entry/common.c:83\\n entry_SYSCALL_64_after_hwframe+0x4b/0x53\\nRIP: 0033:0x7fbd708b0e5d\\nCode: ff c3 66 2e 0f 1f 84 00 00 00 00 00 90 f3 0f 1e fa 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 \u003c48\u003e 3d 01 f0 ff ff 73 01 c3 48 8b 0d 73 9f 1b 00 f7 d8 64 89 01 48\\nRSP: 002b:00007fff8cd33f08 EFLAGS: 00000246 ORIG_RAX: 000000000000002a\\nRAX: ffffffffffffffda RBX: 0000000000000003 RCX: 00007fbd708b0e5d\\nRDX: 0000000000000010 RSI: 0000000020000040 RDI: 0000000000000003\\nRBP: 0000000000000000 R08: 0000000000000040 R09: 0000000000000040\\nR10: 0000000000000040 R11: 0000000000000246 R12: 00007fff8cd34098\\nR13: 0000000000401280 R14: 0000000000406de8 R15: 00007fbd70ab9000\\n \u003c/TASK\u003e\\nremove_proc_entry: removing non-empty directory \u0027net/can-bcm\u0027, leaking at least \u00272456\u0027\"}], \"cpeApplicability\": [{\"nodes\": [{\"negate\": false, \"cpeMatch\": [{\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"4.19.322\", \"versionStartIncluding\": \"2.6.25\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"5.4.284\", \"versionStartIncluding\": \"2.6.25\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"5.10.226\", \"versionStartIncluding\": \"2.6.25\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"5.15.167\", \"versionStartIncluding\": \"2.6.25\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.1.110\", \"versionStartIncluding\": \"2.6.25\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.6.51\", \"versionStartIncluding\": \"2.6.25\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.10.10\", \"versionStartIncluding\": \"2.6.25\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.11\", \"versionStartIncluding\": \"2.6.25\"}], \"operator\": \"OR\"}]}], \"providerMetadata\": {\"orgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"shortName\": \"Linux\", \"dateUpdated\": \"2026-05-11T20:36:09.878Z\"}}}",
      "cveMetadata": "{\"cveId\": \"CVE-2024-46771\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2026-05-11T20:36:09.878Z\", \"dateReserved\": \"2024-09-11T15:12:18.274Z\", \"assignerOrgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"datePublished\": \"2024-09-18T07:12:29.363Z\", \"assignerShortName\": \"Linux\"}",
      "dataType": "CVE_RECORD",
      "dataVersion": "5.2"
    }
  }
}



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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

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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.


Detection rules are retrieved from Rulezet.


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.