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bpf: reject BPF_PSEUDO_FUNC reference to the main program

Type: advisorySource: Official CVE List1 source record

In the Linux kernel, the following vulnerability has been resolved: bpf: reject BPF_PSEUDO_FUNC reference to the main program fixups.c:jit_subprogs() rewrites BPF_PSEUDO_FUNC loads to contain real function addresses. This function is invoked from bpf_jit_subprogs() only when env->subprog_cnt > 1. Meaning that for any program like below: int main(void *ctx) { void *ptr = main; ... bpf_timer_set_callback(..., ptr); ... } The 'ptr' won't be ever converted to contain an address. In combination with e.g. bpf_timer_set_callback() this would lead to a function call at a bogus address. Instead of complicating the implementation, just assume that no useful program needs main to be a sync or async callback and reject BPF_PSEUDO_FUNC loads for the main subprogram.

Announced Source revision 1
Original source ↗

CVE-2026-98075

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-2026-98075

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": "69c087ba6225b574afb6e505b72cb75242a3d844",
        "lessThan": "c74750dca96f40a1adb9d334f5a3152f44b270c3",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "69c087ba6225b574afb6e505b72cb75242a3d844",
        "lessThan": "314c8caa9cb64ad60c5b969fe9a3e2dcdccf156f",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "69c087ba6225b574afb6e505b72cb75242a3d844",
        "lessThan": "8cb75f7ada25b1cf25f2f74dec3ba649b9064a09",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "69c087ba6225b574afb6e505b72cb75242a3d844",
        "lessThan": "118212417ba0120d99f84154799f8880f07411f4",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "69c087ba6225b574afb6e505b72cb75242a3d844",
        "lessThan": "d6c39774ae093c9f7009cc4ae918f18fc1af7ae7",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "69c087ba6225b574afb6e505b72cb75242a3d844",
        "lessThan": "92f0bd0e2b632c6565ac2214a4d7d2ed37e5b9f6",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "69c087ba6225b574afb6e505b72cb75242a3d844",
        "lessThan": "374b2c5561db80fcdd7cdce44af37a49416f61c7",
        "versionType": "git"
      }
    ],
    "programFiles": [
      "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": "5.13"
      },
      {
        "status": "unaffected",
        "version": "0",
        "lessThan": "5.13",
        "versionType": "semver"
      },
      {
        "status": "unaffected",
        "version": "5.15.222",
        "versionType": "semver",
        "lessThanOrEqual": "5.15.*"
      },
      {
        "status": "unaffected",
        "version": "6.1.189",
        "versionType": "semver",
        "lessThanOrEqual": "6.1.*"
      },
      {
        "status": "unaffected",
        "version": "6.6.158",
        "versionType": "semver",
        "lessThanOrEqual": "6.6.*"
      },
      {
        "status": "unaffected",
        "version": "6.12.111",
        "versionType": "semver",
        "lessThanOrEqual": "6.12.*"
      },
      {
        "status": "unaffected",
        "version": "6.18.53",
        "versionType": "semver",
        "lessThanOrEqual": "6.18.*"
      },
      {
        "status": "unaffected",
        "version": "7.2.7",
        "versionType": "semver",
        "lessThanOrEqual": "7.2.*"
      },
      {
        "status": "unaffected",
        "version": "7.3",
        "versionType": "original_commit_for_fix",
        "lessThanOrEqual": "*"
      }
    ],
    "programFiles": [
      "kernel/bpf/verifier.c"
    ],
    "defaultStatus": "affected"
  }
]
Related CVEs
CVE-2026-98075

Source reference: /cveMetadata/cveId

Publisher severity

No explicit severity was provided.

Event
#38185 · Revision 1
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Publisher date
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