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bpf: Fix WARNING in bpf_tracing_link_release

Type: advisorySource: Official CVE List1 source record

In the Linux kernel, the following vulnerability has been resolved: bpf: Fix WARNING in bpf_tracing_link_release The trampoline could be corrupted by the blindly 'tr->flags = BPF_TRAMP_F_TAIL_CALL_CTX' in verifier. 1. A fexit attached to a tail_call_reachable prog. 'tr->flags' became 'BPF_TRAMP_F_CALL_ORIG | BPF_TRAMP_F_TAIL_CALL_CTX'. And, the trampoline would poke the target prog's nop insn using jmp insn instead of call insn. 2. Another fexit loaded with the same tail_call_reachable prog target. 'tr->flags' became 'BPF_TRAMP_F_TAIL_CALL_CTX'. 3. Close the first fexit link. Due to no BPF_TRAMP_F_CALL_ORIG in 'tr->flags', the trampoline will fail to restore the prog's nop insn using call insn. [ 3.410719] WARNING: kernel/bpf/syscall.c:3551 at bpf_tracing_link_release+0x53/0x60, CPU#1: test_progs/98 ... [ 3.428793] bpf_link_free+0x58/0x130 [ 3.429293] bpf_link_release+0x23/0x30 Fix the warning by updating 'tr->flags' with '|=' and lock.

Announced Source revision 1
Original source ↗

CVE-2026-92485

Primary source · Revision 1

Imported from structured advisory data. Source references identify upstream records or fields; verify affected versions and your deployed configuration.

Security context

Source reference: cve:CVE-2026-92485

Linux

Source reference: /containers/cna/affected/0/product

Affected versions
Not stated in this record
Fixed versions
Not stated in this record
Prerequisites
Not stated in this record

Linux

Source reference: /containers/cna/affected/1/product

Affected versions
Not stated in this record
Fixed versions
Not stated in this record
Prerequisites
Not stated in this record

Structured affected-version data

Original package identities and version rules from this source.

[
  {
    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
    "vendor": "Linux",
    "product": "Linux",
    "versions": [
      {
        "status": "affected",
        "version": "8f873cc3f67f2257493063e57d0caf07ef889ee9",
        "lessThan": "a5c6316052f0ff1467221ecf2996cbab0a496b1e",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "2b5dcb31a19a2e0acd869b12c9db9b2d696ef544",
        "lessThan": "d02035c5eb4955616efc5c6dbe3d98f19d798cb2",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "2b5dcb31a19a2e0acd869b12c9db9b2d696ef544",
        "lessThan": "094f0a895cf97a993d06d5dc4c12e7cb7da845a5",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "2b5dcb31a19a2e0acd869b12c9db9b2d696ef544",
        "lessThan": "48a0209d8da0d90a7b0a0db19d1ff88027b13781",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "2b5dcb31a19a2e0acd869b12c9db9b2d696ef544",
        "lessThan": "61aaa8782bec59ecffd22e030f54ef9351bcabf9",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "605c8d8f9966fcd2f0b858fabebe416fc83f2209",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "028480eaf2a1401e914a1fa1a4a21d877cf0ae30",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "6.6.2",
        "lessThan": "6.6.160",
        "versionType": "semver"
      },
      {
        "status": "affected",
        "version": "6.1.72",
        "lessThan": "6.2",
        "versionType": "semver"
      },
      {
        "status": "affected",
        "version": "6.5.12",
        "lessThan": "6.6",
        "versionType": "semver"
      }
    ],
    "programFiles": [
      "include/linux/bpf.h",
      "kernel/bpf/trampoline.c",
      "kernel/bpf/verifier.c"
    ],
    "defaultStatus": "unaffected"
  },
  {
    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
    "vendor": "Linux",
    "product": "Linux",
    "versions": [
      {
        "status": "affected",
        "version": "6.7"
      },
      {
        "status": "unaffected",
        "version": "0",
        "lessThan": "6.7",
        "versionType": "semver"
      },
      {
        "status": "unaffected",
        "version": "6.6.160",
        "versionType": "semver",
        "lessThanOrEqual": "6.6.*"
      },
      {
        "status": "unaffected",
        "version": "6.12.114",
        "versionType": "semver",
        "lessThanOrEqual": "6.12.*"
      },
      {
        "status": "unaffected",
        "version": "6.18.57",
        "versionType": "semver",
        "lessThanOrEqual": "6.18.*"
      },
      {
        "status": "unaffected",
        "version": "7.2.6",
        "versionType": "semver",
        "lessThanOrEqual": "7.2.*"
      },
      {
        "status": "unaffected",
        "version": "7.3",
        "versionType": "original_commit_for_fix",
        "lessThanOrEqual": "*"
      }
    ],
    "programFiles": [
      "include/linux/bpf.h",
      "kernel/bpf/trampoline.c",
      "kernel/bpf/verifier.c"
    ],
    "defaultStatus": "affected"
  }
]
Related CVEs
CVE-2026-92485

Source reference: /cveMetadata/cveId

Publisher severity

high

Source reference: /containers/cna/metrics

Event
#48699 · Revision 1
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Publisher date
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