# CVE-2026-23048: linux: In the Linux kernel, the following vulnerability has been resolved:  udp: call skb_orphan() before skb_attempt_defer_...

CVE-2026-23048 is fixed in linux on 1 platform by DEBIAN-CVE-2026-23048 (version 6.18.8-1), released February 4, 2026. It is not reported as exploited. Patch Radar priority: Routine.

- Web page: https://patchblox.com/security/cve/CVE-2026-23048
- Priority: Routine
- CVSS: n/a
- EPSS: 0.0017
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Feb 4, 2026

## 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.

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | linux Debian 14 | 6.18.8-1 | [DEBIAN-CVE-2026-23048](https://patchblox.com/security/data/fix/linux/debian-cve-2026-23048.md) | Feb 4, 2026 |

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Data as of 2026-11-08T19:12:23Z UTC. Source: Patchblox Patch Radar (https://patchblox.com/security/patch-radar). Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo

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