CVE-2026-23048

Linux Kernel 6.18-6.18.5 - Denial of Service via UDP Receive Path

Title source: llm
STIX 2.1

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

EPSS 0.0003
EPSS Percentile 8.2%

Details

Status published
Products (7)
linux/Kernel 6.18.0 - 6.18.6linux
Linux/Linux < 6.18
Linux/Linux 6.18
Linux/Linux 6.18.6 - 6.18.*
Linux/Linux 6.19
Linux/Linux 6471658dc66c670580a7616e75f51b52917e7883 - 0c63d5683eae6a7b4d81382bcbecb2a19feff90d
Linux/Linux 6471658dc66c670580a7616e75f51b52917e7883 - e5c8eda39a9fc1547d1398d707aa06c1d080abdd
Published Feb 04, 2026
Tracked Since Feb 18, 2026