CVE-2025-39990bpf: Check the helper function is valid in get_helper_proto
Updated under an hour ago ()
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No exploitation reported and no EPSS estimate yet.
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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/202507160818.68358831-lkp@intel.com
- CVSS
- 7.8 HIGH (v3.1, CNA)CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
- Weakness (CWE)
- Not given
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- Linux
- NVD analysis
- Deferred
- Record last updated
- Oct 15, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
Linux Linux linux:linux (from the name) | from f470378c7562a2818b45ed11c98973f2b89eedd3 before 3d429cb1278e995e22995ef117fa96d223a67e93; from f470378c7562a2818b45ed11c98973f2b89eedd3 before 6233715b4b714068d6c831d214a4e8792109875a; from f470378c7562a2818b45ed11c98973f2b89eedd3 before e4414b01c1cd9887bbde92f946c1ba94e40d6d64 | CNA record |
References
- https://git.kernel.org/stable/c/3d429cb1278e995e22995ef117fa96d223a67e93
- https://git.kernel.org/stable/c/6233715b4b714068d6c831d214a4e8792109875a
- https://git.kernel.org/stable/c/e4414b01c1cd9887bbde92f946c1ba94e40d6d64
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.