Riskcovery

CVE-2026-23048

udp: call skb_orphan() before skb_attempt_defer_free()

State
Published
Severity
Not scored
Published
Feb 4, 2026
Updated
May 11, 2026
Reserved
Jan 13, 2026

Read the record on cve.org

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.

Scores

The record has no CVSS score.

Weaknesses

The record names no weakness.

Affected Products

ProductVersions
LinuxLinux
  • 6471658dc66c670580a7616e75f51b52917e7883 to before 0c63d5683eae6a7b4d81382bcbecb2a19feff90dAffected
  • 6471658dc66c670580a7616e75f51b52917e7883 to before e5c8eda39a9fc1547d1398d707aa06c1d080abddAffected
LinuxLinux
  • 6.18Affected
  • before 6.18Not affected
  • 6.18.6 through 6.18.*Not affected
  • 6.19 and laterNot affected

References

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