CVE-2026-74305High· 7.8▾ TwilightIn 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-…
▾ Twilight zone — High severity, or a signal on a lesser flaw
impact 42.9 · likelihood 0 · exploitation 0
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Stakeholder-Specific Vulnerability Categorization from CISA's ADP record at CVE.org: whether exploitation is observed, whether an attack can be automated, and how much of the system is at stake. The CVSS score shown above comes from the assigning CNA record, not NVD.
Disclosure to exploitation, from the record and what we observed since indexing it.
Disclosed via CVEORG
Last analysed / modified upstream
0.2%
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.
Linux >= c1c74584b9b4043c52e41fec415226e582d266a3 < 87177497cca90bf4fcfb759eb898560eb5b46a10Linux >= 66da7cee78590259b400e51a70622ccd41da7bb2 < 1c762d28698483ce7c372091f34d86e4d4828652Linux >= 7acfa07c585e3d7a64654d38f0a5c762877d0b9b < eb73056ce2a6f101ddd3bdba89af6b24ebffff85Linux >= 41688d1fc5d163a6c2c0e95c0419e2cb31a44648 < 9ca06849c4239aa2d580c54651f8588c51cb398bLinux >= abad3d0bad72a52137e0c350c59542d75ae4f513 < 46fbafe3d2d569d828e8d24a7dbe1659f63685cfLinux >= abad3d0bad72a52137e0c350c59542d75ae4f513 < cb22dc79528eb26a46d346c3118dbd6b14c70609Linux >= abad3d0bad72a52137e0c350c59542d75ae4f513 < 10627ddc0167aab5c1c390a10ef461e9937aba08Linux 19341d5c59e8c7e8528e40f8663e99d67810473cLinux >= 5.15.192 < 5.15.212Linux >= 6.1.151 < 6.1.178Linux >= 6.6.105 < 6.6.145Linux >= 6.12.46 < 6.12.97Linux >= 6.16.1 < 6.17Linux 6.17Refer to the linked advisories for vendor-supplied fixes and affected version ranges.
Connected by shared product, vendor, weakness, or advisory.
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