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Description

In the Linux kernel, the following vulnerability has been resolved: udp: call skb_orphan() before skb_attempt_defer_free() Standard UDP receive path does not use skb->destructor. But skmsg layer does use it, since it calls skb_set_owner_sk_safe() from udp_read_skb(). This then triggers this warning in skb_attempt_defer_free(): DEBUG_NET_WARN_ON_ONCE(skb->destructor); We must call skb_orphan() to fix this issue.

PUBLISHED Reserved 2026-01-13 | Published 2026-02-04 | Updated 2026-02-09 | Assigner Linux

Product status

Default status
unaffected

6471658dc66c670580a7616e75f51b52917e7883 (git) before 0c63d5683eae6a7b4d81382bcbecb2a19feff90d
affected

6471658dc66c670580a7616e75f51b52917e7883 (git) before e5c8eda39a9fc1547d1398d707aa06c1d080abdd
affected

Default status
affected

6.18
affected

Any version before 6.18
unaffected

6.18.6 (semver)
unaffected

6.19 (original_commit_for_fix)
unaffected

References

git.kernel.org/...c/0c63d5683eae6a7b4d81382bcbecb2a19feff90d

git.kernel.org/...c/e5c8eda39a9fc1547d1398d707aa06c1d080abdd

cve.org (CVE-2026-23048)

nvd.nist.gov (CVE-2026-23048)

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