bpf: crypto: Use the correct destructor kfunc type

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Summary

CVECVE-2026-43306
StatePUBLISHED
AssignerLinux
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-05-08 14:16:37 UTC
Updated2026-05-12 14:10:27 UTC
DescriptionIn the Linux kernel, the following vulnerability has been resolved: bpf: crypto: Use the correct destructor kfunc type With CONFIG_CFI enabled, the kernel strictly enforces that indirect function calls use a function pointer type that matches the target function. I ran into the following type mismatch when running BPF self-tests: CFI failure at bpf_obj_free_fields+0x190/0x238 (target: bpf_crypto_ctx_release+0x0/0x94; expected type: 0xa488ebfc) Internal error: Oops - CFI: 00000000f2008228 [#1] SMP ... As bpf_crypto_ctx_release() is also used in BPF programs and using a void pointer as the argument would make the verifier unhappy, add a simple stub function with the correct type and register it as the destructor kfunc instead.

Risk And Classification

EPSS: 0.000180000 probability, percentile 0.047270000 (date 2026-05-12)

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Linux Linux affected 3e1c6f35409f9e447bf37f64840f5b65576bfb78 4e3e57dbf46dad3498f8c4219ce2dba756875962 git Not specified
CNA Linux Linux affected 3e1c6f35409f9e447bf37f64840f5b65576bfb78 50d6fd69388cc7b05dce72f09080674dcede4ac9 git Not specified
CNA Linux Linux affected 3e1c6f35409f9e447bf37f64840f5b65576bfb78 3979a550fe06b370d73647f59cf462fa525c9ec4 git Not specified
CNA Linux Linux affected 3e1c6f35409f9e447bf37f64840f5b65576bfb78 b40a5d724f29fc2eed23ff353808a9aae616b48a git Not specified
CNA Linux Linux affected 6.10 Not specified
CNA Linux Linux unaffected 6.10 semver Not specified
CNA Linux Linux unaffected 6.12.75 6.12.* semver Not specified
CNA Linux Linux unaffected 6.18.16 6.18.* semver Not specified
CNA Linux Linux unaffected 6.19.6 6.19.* semver Not specified
CNA Linux Linux unaffected 7.0 * original_commit_for_fix Not specified

References

ReferenceSourceLinkTags
git.kernel.org/stable/c/3979a550fe06b370d73647f59cf462fa525c9ec4 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/4e3e57dbf46dad3498f8c4219ce2dba756875962 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/b40a5d724f29fc2eed23ff353808a9aae616b48a 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/50d6fd69388cc7b05dce72f09080674dcede4ac9 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
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