CVE-2026-23048
Unknown
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.
SeverityUnknown
CVSS—
Exploit probability—
Product
Linux
PublishedFeb 4, 2026
First seenFeb 4, 2026
How to fix
Update
- Linux Linux0c63d5683eae6a7b4d81382bcbecb2a19feff90d, e5c8eda39a9fc1547d1398d707aa06c1d080abdd or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| Linux Linux | 6471658dc66c670580a7616e75f51b52917e7883 ≤ v < 0c63d5683eae6a7b4d81382bcbecb2a19feff90d, 6471658dc66c670580a7616e75f51b52917e7883 ≤ v < e5c8eda39a9fc1547d1398d707aa06c1d080abdd, 6.18 | 0c63d5683eae6a7b4d81382bcbecb2a19feff90d, e5c8eda39a9fc1547d1398d707aa06c1d080abdd |
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