bpf: Tighten cgroup storage cookie checks for prog arrays
Summary
| CVE | CVE-2026-74305 |
|---|---|
| State | PUBLISHED |
| Assigner | Linux |
| Source Priority | CVE Program / NVD first with legacy fallback |
| Published | 2026-08-15 06:22:30 UTC |
| Updated | 2026-08-15 06:22:30 UTC |
| Description | In the Linux kernel, the following vulnerability has been resolved: bpf: Tighten cgroup storage cookie checks for prog arrays The fix in commit abad3d0bad72 ("bpf: Fix oob access in cgroup local storage") is still incomplete. The prog-array compatibility check treats a program with no cgroup storage as compatible with any stored storage cookie. This allows a storage-less program to bridge a tail call chain between an entry program and a storage-using callee even though cgroup local storage at runtime still follows the caller's context, that is, A -> B(no storage) -> C(storage) path. Requiring exact cookie equality would break the legitimate case of a storage-less leaf program being tail called from a storage-using one. Instead, only accept a zero storage cookie if the program cannot perform tail calls itself. This keeps A -> B(no storage) working while rejecting the A -> B(no storage) -> C(storage) bridge. |
Risk And Classification
EPSS: 0.001720000 probability, percentile 0.069290000 (date 2026-08-15)
Vendor Declared Affected Products
| Source | Vendor | Product | Version | Platforms |
|---|---|---|---|---|
| CNA | Linux | Linux | affected c1c74584b9b4043c52e41fec415226e582d266a3 87177497cca90bf4fcfb759eb898560eb5b46a10 git | Not specified |
| CNA | Linux | Linux | affected 66da7cee78590259b400e51a70622ccd41da7bb2 1c762d28698483ce7c372091f34d86e4d4828652 git | Not specified |
| CNA | Linux | Linux | affected 7acfa07c585e3d7a64654d38f0a5c762877d0b9b eb73056ce2a6f101ddd3bdba89af6b24ebffff85 git | Not specified |
| CNA | Linux | Linux | affected 41688d1fc5d163a6c2c0e95c0419e2cb31a44648 9ca06849c4239aa2d580c54651f8588c51cb398b git | Not specified |
| CNA | Linux | Linux | affected abad3d0bad72a52137e0c350c59542d75ae4f513 46fbafe3d2d569d828e8d24a7dbe1659f63685cf git | Not specified |
| CNA | Linux | Linux | affected abad3d0bad72a52137e0c350c59542d75ae4f513 cb22dc79528eb26a46d346c3118dbd6b14c70609 git | Not specified |
| CNA | Linux | Linux | affected abad3d0bad72a52137e0c350c59542d75ae4f513 10627ddc0167aab5c1c390a10ef461e9937aba08 git | Not specified |
| CNA | Linux | Linux | affected 19341d5c59e8c7e8528e40f8663e99d67810473c git | Not specified |
| CNA | Linux | Linux | affected 5.15.192 5.15.212 semver | Not specified |
| CNA | Linux | Linux | affected 6.1.151 6.1.178 semver | Not specified |
| CNA | Linux | Linux | affected 6.6.105 6.6.145 semver | Not specified |
| CNA | Linux | Linux | affected 6.12.46 6.12.97 semver | Not specified |
| CNA | Linux | Linux | affected 6.16.1 6.17 semver | Not specified |
| CNA | Linux | Linux | affected 6.17 | Not specified |
| CNA | Linux | Linux | unaffected 6.17 semver | Not specified |
| CNA | Linux | Linux | unaffected 5.15.212 5.15.* semver | Not specified |
| CNA | Linux | Linux | unaffected 6.1.178 6.1.* semver | Not specified |
| CNA | Linux | Linux | unaffected 6.6.145 6.6.* semver | Not specified |
| CNA | Linux | Linux | unaffected 6.12.97 6.12.* semver | Not specified |
| CNA | Linux | Linux | unaffected 6.18.40 6.18.* semver | Not specified |
| CNA | Linux | Linux | unaffected 7.1.5 7.1.* semver | Not specified |
| CNA | Linux | Linux | unaffected 7.2-rc1 * original_commit_for_fix | Not specified |
References
| Reference | Source | Link | Tags |
|---|---|---|---|
| git.kernel.org/stable/c/1c762d28698483ce7c372091f34d86e4d4828652 | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | |
| git.kernel.org/stable/c/9ca06849c4239aa2d580c54651f8588c51cb398b | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | |
| git.kernel.org/stable/c/10627ddc0167aab5c1c390a10ef461e9937aba08 | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | |
| git.kernel.org/stable/c/46fbafe3d2d569d828e8d24a7dbe1659f63685cf | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | |
| git.kernel.org/stable/c/87177497cca90bf4fcfb759eb898560eb5b46a10 | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | |
| git.kernel.org/stable/c/eb73056ce2a6f101ddd3bdba89af6b24ebffff85 | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | |
| git.kernel.org/stable/c/cb22dc79528eb26a46d346c3118dbd6b14c70609 | 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.