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CVE-2025-39990

7.8 high SSVC exploitation: none Deferred
NVD · CVE.org

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]

Fix

Nothing published yet: no patch, vendor advisory or mitigation reference on NVD, no vendor advisory in the News for this CVE, not in CISA's KEV, no fixed package version. BaselineWatch does not guess at one.

Change history 2

  1. References+1 references (now 4)NVD modified 2026-10-21 13:18
  2. First seenCVSS 7.8NVD modified 2026-10-15 22:18

Affected (CPE criteria) 0

NVD has not attached CPE configurations yet.

References 4