net: psp: avoid conflicts with skb->decrypted and sk_validate_xmit_skb()

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2026-98274
StatePUBLISHED
AssignerLinux
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-10-06 09:18:17 UTC
Updated2026-10-19 10:18:28 UTC
DescriptionIn the Linux kernel, the following vulnerability has been resolved: net: psp: avoid conflicts with skb->decrypted and sk_validate_xmit_skb() PSP conflicts with TLS ULP in its usage of both skb->decrypted and sk->sk_validate_xmit_skb(). Make PSP mutually exclusive with TLS ULP, the only other user of either of these. As other users of skb->decrypted come along, they can be added to sk_has_decrypt_user(). It would make sense to also assert that sk->sk_validate_xmit_skb() is also NULL in both of these setup paths for similar future proofing, but the PSP listener/sk_clone() path is still broken and it could be seen as a regression to not allow rx assoc to run on a child of a listener socket with PSP tx assoc state. Include all TCP ULPs in the sk_has_decrypt_user() check, even though TLS is the only one that conflicts with PSP via the decrypted bit. This is intentional because PSP was not designed to be used with ULPs. It is best to close off surface area that may make bugs reachable, until someone wishes to design and test an actual user of PSP with ULPs.

Risk And Classification

EPSS: 0.001730000 probability, percentile 0.061510000 (date 2026-10-06)

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Linux Linux affected 6b46ca260e2290e3453d1355ab5b6d283d73d780 a13cca5ba5375f13cbdab545abfb5e288bef3f78 git Not specified
CNA Linux Linux affected 6b46ca260e2290e3453d1355ab5b6d283d73d780 c8c8c18862337c469e325c207601de3279847809 git Not specified
CNA Linux Linux affected 6b46ca260e2290e3453d1355ab5b6d283d73d780 a41f24c612c3f5139a3143307eb85bbcf1bd4d07 git Not specified
CNA Linux Linux affected 6.18 Not specified
CNA Linux Linux unaffected 6.18 semver Not specified
CNA Linux Linux unaffected 6.18.54 6.18.* semver Not specified
CNA Linux Linux unaffected 7.2.8 7.2.* semver Not specified
CNA Linux Linux unaffected 7.3 * original_commit_for_fix Not specified

References

ReferenceSourceLinkTags
git.kernel.org/stable/c/c8c8c18862337c469e325c207601de3279847809 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/a41f24c612c3f5139a3143307eb85bbcf1bd4d07 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/a13cca5ba5375f13cbdab545abfb5e288bef3f78 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
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