bpf: Check the helper function is valid in get_helper_proto

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2025-39990
StatePUBLISHED
AssignerLinux
Source PriorityCVE Program / NVD first with legacy fallback
Published2025-10-15 08:15:37 UTC
Updated2026-07-30 06:24:05 UTC
DescriptionIn 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]

Risk And Classification

Primary CVSS: v3.1 7.8 HIGH from 416baaa9-dc9f-4396-8d5f-8c081fb06d67

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

EPSS: 0.001410000 probability, percentile 0.038980000 (date 2026-07-31)

VersionSourceTypeScoreSeverityVector
3.1416baaa9-dc9f-4396-8d5f-8c081fb06d67Secondary7.8HIGHCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
3.1CNADECLARED7.8HIGHCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

CVSS v3.1 Breakdown

Attack Vector
Local
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Linux Linux affected f470378c7562a2818b45ed11c98973f2b89eedd3 3d429cb1278e995e22995ef117fa96d223a67e93 git Not specified
CNA Linux Linux affected f470378c7562a2818b45ed11c98973f2b89eedd3 6233715b4b714068d6c831d214a4e8792109875a git Not specified
CNA Linux Linux affected f470378c7562a2818b45ed11c98973f2b89eedd3 e4414b01c1cd9887bbde92f946c1ba94e40d6d64 git Not specified
CNA Linux Linux affected 5.8 Not specified
CNA Linux Linux unaffected 5.8 semver Not specified
CNA Linux Linux unaffected 6.12.50 6.12.* semver Not specified
CNA Linux Linux unaffected 6.16.10 6.16.* semver Not specified
CNA Linux Linux unaffected 6.17 * original_commit_for_fix Not specified

References

ReferenceSourceLinkTags
git.kernel.org/stable/c/6233715b4b714068d6c831d214a4e8792109875a 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/e4414b01c1cd9887bbde92f946c1ba94e40d6d64 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/3d429cb1278e995e22995ef117fa96d223a67e93 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
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