bpf: reject BPF_PSEUDO_FUNC reference to the main program
Summary
| CVE | CVE-2026-98075 |
|---|---|
| State | PUBLISHED |
| Assigner | Linux |
| Source Priority | CVE Program / NVD first with legacy fallback |
| Published | 2026-09-25 11:17:36 UTC |
| Updated | 2026-10-03 11:18:28 UTC |
| Description | 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. |
Risk And Classification
EPSS: 0.001720000 probability, percentile 0.059980000 (date 2026-10-05)
Vendor Declared Affected Products
| Source | Vendor | Product | Version | Platforms |
|---|---|---|---|---|
| CNA | Linux | Linux | affected 69c087ba6225b574afb6e505b72cb75242a3d844 c74750dca96f40a1adb9d334f5a3152f44b270c3 git | Not specified |
| CNA | Linux | Linux | affected 69c087ba6225b574afb6e505b72cb75242a3d844 314c8caa9cb64ad60c5b969fe9a3e2dcdccf156f git | Not specified |
| CNA | Linux | Linux | affected 69c087ba6225b574afb6e505b72cb75242a3d844 8cb75f7ada25b1cf25f2f74dec3ba649b9064a09 git | Not specified |
| CNA | Linux | Linux | affected 69c087ba6225b574afb6e505b72cb75242a3d844 118212417ba0120d99f84154799f8880f07411f4 git | Not specified |
| CNA | Linux | Linux | affected 69c087ba6225b574afb6e505b72cb75242a3d844 d6c39774ae093c9f7009cc4ae918f18fc1af7ae7 git | Not specified |
| CNA | Linux | Linux | affected 69c087ba6225b574afb6e505b72cb75242a3d844 92f0bd0e2b632c6565ac2214a4d7d2ed37e5b9f6 git | Not specified |
| CNA | Linux | Linux | affected 69c087ba6225b574afb6e505b72cb75242a3d844 374b2c5561db80fcdd7cdce44af37a49416f61c7 git | Not specified |
| CNA | Linux | Linux | affected 5.13 | Not specified |
| CNA | Linux | Linux | unaffected 5.13 semver | Not specified |
| CNA | Linux | Linux | unaffected 5.15.222 5.15.* semver | Not specified |
| CNA | Linux | Linux | unaffected 6.1.189 6.1.* semver | Not specified |
| CNA | Linux | Linux | unaffected 6.6.158 6.6.* semver | Not specified |
| CNA | Linux | Linux | unaffected 6.12.111 6.12.* semver | Not specified |
| CNA | Linux | Linux | unaffected 6.18.53 6.18.* semver | Not specified |
| CNA | Linux | Linux | unaffected 7.2.7 7.2.* semver | Not specified |
| CNA | Linux | Linux | unaffected 7.3-rc2 * original_commit_for_fix | Not specified |
References
| Reference | Source | Link | Tags |
|---|---|---|---|
| git.kernel.org/stable/c/8cb75f7ada25b1cf25f2f74dec3ba649b9064a09 | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | |
| git.kernel.org/stable/c/d6c39774ae093c9f7009cc4ae918f18fc1af7ae7 | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | |
| git.kernel.org/stable/c/c74750dca96f40a1adb9d334f5a3152f44b270c3 | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | |
| git.kernel.org/stable/c/374b2c5561db80fcdd7cdce44af37a49416f61c7 | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | |
| git.kernel.org/stable/c/92f0bd0e2b632c6565ac2214a4d7d2ed37e5b9f6 | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | |
| git.kernel.org/stable/c/314c8caa9cb64ad60c5b969fe9a3e2dcdccf156f | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | |
| git.kernel.org/stable/c/118212417ba0120d99f84154799f8880f07411f4 | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | |
| CVE Program record | CVE.ORG | www.cve.org | canonical |
| NVD vulnerability detail | NVD | nvd.nist.gov | canonical, analysis |
No vendor comments have been submitted for this CVE.
There are currently no legacy QID mappings associated with this CVE.