CVE-2026-74305bpf: Tighten cgroup storage cookie checks for prog arrays
Updated under an hour ago ()
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No exploitation reported and no EPSS estimate yet.
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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.
- CVSS
- 7.8 HIGH (v3.1, CNA)CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
- Weakness (CWE)
- Not given
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- Linux
- NVD analysis
- Received
- Record last updated
- Oct 16, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
Linux Linux linux:linux (from the name) | from c1c74584b9b4043c52e41fec415226e582d266a3 before 87177497cca90bf4fcfb759eb898560eb5b46a10; 66da7cee78590259b400e51a70622ccd41da7bb2 builds before 1c762d28698483ce7c372091f34d86e4d4828652; from 7acfa07c585e3d7a64654d38f0a5c762877d0b9b before eb73056ce2a6f101ddd3bdba89af6b24ebffff85; 41688d1fc5d163a6c2c0e95c0419e2cb31a44648 builds before 9ca06849c4239aa2d580c54651f8588c51cb398b; from abad3d0bad72a52137e0c350c59542d75ae4f513 before 46fbafe3d2d569d828e8d24a7dbe1659f63685cf; from abad3d0bad72a52137e0c350c59542d75ae4f513 before cb22dc79528eb26a46d346c3118dbd6b14c70609; from abad3d0bad72a52137e0c350c59542d75ae4f513 before 10627ddc0167aab5c1c390a10ef461e9937aba08; 19341d5c59e8c7e8528e40f8663e99d67810473c; and 5 more ranges | CNA record |
References
- https://git.kernel.org/stable/c/87177497cca90bf4fcfb759eb898560eb5b46a10
- https://git.kernel.org/stable/c/1c762d28698483ce7c372091f34d86e4d4828652
- https://git.kernel.org/stable/c/eb73056ce2a6f101ddd3bdba89af6b24ebffff85
- https://git.kernel.org/stable/c/9ca06849c4239aa2d580c54651f8588c51cb398b
- https://git.kernel.org/stable/c/46fbafe3d2d569d828e8d24a7dbe1659f63685cf
- https://git.kernel.org/stable/c/cb22dc79528eb26a46d346c3118dbd6b14c70609
- https://git.kernel.org/stable/c/10627ddc0167aab5c1c390a10ef461e9937aba08
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.