CVEvulnerability
CVE-2025-39990
7.8 HIGH
Official page ↗
- Status
- Deferred
- Published
- 2025-10-15
- Last modified
- 2026-10-21
- Assigner
- 416baaa9-dc9f-4396-8d5f-8c081fb06d67
- CVSS 3.1 (416baaa9-dc9f-4396-8d5f-8c081fb06d67)
- 7.8 HIGH — CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Description
In the Linux kernel, the following vulnerability has been resolved:
bpf: Check the helper function is valid in get_helper_proto
kernel test robot reported verifier bug [1] where the helper func
pointer could be NULL due to disabled config option.
As Alexei suggested we could check on that in get_helper_proto
directly. Marking tail_call helper func with BPF_PTR_POISON,
because it is unused by design.
[1] https://lore.kernel.org/oe-lkp/[email protected]
References
- https://git.kernel.org/stable/c/3d429cb1278e995e22995ef117fa96d223a67e93 git.kernel.org
- https://git.kernel.org/stable/c/6233715b4b714068d6c831d214a4e8792109875a git.kernel.org
- https://git.kernel.org/stable/c/dfbff47f120e4b0793ca0e0b8660361ccac25a74 git.kernel.org
- https://git.kernel.org/stable/c/e4414b01c1cd9887bbde92f946c1ba94e40d6d64 git.kernel.org