CVE-2026-74305
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.
How to fix
- Linux Linux87177497cca90bf4fcfb759eb898560eb5b46a10, 1c762d28698483ce7c372091f34d86e4d4828652, eb73056ce2a6f101ddd3bdba89af6b24ebffff85, 9ca06849c4239aa2d580c54651f8588c51cb398b, 46fbafe3d2d569d828e8d24a7dbe1659f63685cf, cb22dc79528eb26a46d346c3118dbd6b14c70609, 10627ddc0167aab5c1c390a10ef461e9937aba08, 5.15.212, 6.1.178, 6.6.145, 6.12.97, 6.17 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| Linux Linux | c1c74584b9b4043c52e41fec415226e582d266a3 ≤ v < 87177497cca90bf4fcfb759eb898560eb5b46a10, 66da7cee78590259b400e51a70622ccd41da7bb2 ≤ v < 1c762d28698483ce7c372091f34d86e4d4828652, 7acfa07c585e3d7a64654d38f0a5c762877d0b9b ≤ v < eb73056ce2a6f101ddd3bdba89af6b24ebffff85, 41688d1fc5d163a6c2c0e95c0419e2cb31a44648 ≤ v < 9ca06849c4239aa2d580c54651f8588c51cb398b, abad3d0bad72a52137e0c350c59542d75ae4f513 ≤ v < 46fbafe3d2d569d828e8d24a7dbe1659f63685cf, abad3d0bad72a52137e0c350c59542d75ae4f513 ≤ v < cb22dc79528eb26a46d346c3118dbd6b14c70609, abad3d0bad72a52137e0c350c59542d75ae4f513 ≤ v < 10627ddc0167aab5c1c390a10ef461e9937aba08, 19341d5c59e8c7e8528e40f8663e99d67810473c, 5.15.192 ≤ v < 5.15.212, 6.1.151 ≤ v < 6.1.178, 6.6.105 ≤ v < 6.6.145, 6.12.46 ≤ v < 6.12.97, 6.16.1 ≤ v < 6.17, 6.17 | 87177497cca90bf4fcfb759eb898560eb5b46a10, 1c762d28698483ce7c372091f34d86e4d4828652, eb73056ce2a6f101ddd3bdba89af6b24ebffff85, 9ca06849c4239aa2d580c54651f8588c51cb398b, 46fbafe3d2d569d828e8d24a7dbe1659f63685cf, cb22dc79528eb26a46d346c3118dbd6b14c70609, 10627ddc0167aab5c1c390a10ef461e9937aba08, 5.15.212, 6.1.178, 6.6.145, 6.12.97, 6.17 |
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