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CVE PROGRAM SOURCE RECORD7.8 High

CVE-2026-74305

bpf: Tighten cgroup storage cookie checks for prog arrays

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Status
Published
Published
Updated
Assigning organization
Linux

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.

Affected products

Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.

Linux Linux

Default version status: unaffected

  • c1c74584b9b4043c52e41fec415226e582d266a3 to < 87177497cca90bf4fcfb759eb898560eb5b46a10affected
  • 66da7cee78590259b400e51a70622ccd41da7bb2 to < 1c762d28698483ce7c372091f34d86e4d4828652affected
  • 7acfa07c585e3d7a64654d38f0a5c762877d0b9b to < eb73056ce2a6f101ddd3bdba89af6b24ebffff85affected
  • 41688d1fc5d163a6c2c0e95c0419e2cb31a44648 to < 9ca06849c4239aa2d580c54651f8588c51cb398baffected
  • abad3d0bad72a52137e0c350c59542d75ae4f513 to < 46fbafe3d2d569d828e8d24a7dbe1659f63685cfaffected
  • abad3d0bad72a52137e0c350c59542d75ae4f513 to < cb22dc79528eb26a46d346c3118dbd6b14c70609affected
  • abad3d0bad72a52137e0c350c59542d75ae4f513 to < 10627ddc0167aab5c1c390a10ef461e9937aba08affected
  • 19341d5c59e8c7e8528e40f8663e99d67810473caffected
  • 5.15.192 to < 5.15.212affected
  • 6.1.151 to < 6.1.178affected
  • 6.6.105 to < 6.6.145affected
  • 6.12.46 to < 6.12.97affected
  • 6.16.1 to < 6.17affected

Linux Linux

Default version status: affected

  • 6.17affected
  • 0 to < 6.17unaffected
  • 5.15.212 to ≤ 5.15.*unaffected
  • 6.1.178 to ≤ 6.1.*unaffected
  • 6.6.145 to ≤ 6.6.*unaffected
  • 6.12.97 to ≤ 6.12.*unaffected
  • 6.18.40 to ≤ 6.18.*unaffected
  • 7.1.5 to ≤ 7.1.*unaffected
  • 7.2 to ≤ *unaffected

References