CVE-2026-80846

CVE CVE-2026-80846EUVD EUVD-2026-71296Published 2026-09-04T15:54:56.000Z

What the advisory describes

In the Linux kernel, the following vulnerability has been resolved: xfrm: drop ESP-in-TCP packets with no ingress device ESP-in-TCP receives records through the TCP strparser. handle_esp() restores skb->dev from the saved skb_iif before passing the packet into the XFRM input path. Queued TCP data can be processed after the original ingress device has been removed, for example during veth or net namespace teardown. In that case dev_get_by_index_rcu() returns NULL. The XFRM IPv4 and IPv6 input paths both expect skb->dev to be valid while building the route lookup, so queued ESP-in-TCP data can dereference a NULL device. Drop the packet if the saved ingress device can no longer be resolved. Such a packet can no longer be routed through the normal XFRM receive path, and this preserves the existing behaviour for packets whose ingress device still exists.

Source: EUVD (ENISA), in the words of the advisory.

Products the advisory names

These come from the advisory itself, not from any check we performed.

Linux — Linux patch: 7.3-rc1; e27cca96cd68fa2c6814c90f9a1cfd36bb68c593 <f00235f9d12301183d61f75fbe4105506f3e5140; e27cca96cd68fa2c6814c90f9a1cfd36bb68c593 <328e40aa774b446969c69b654c52a051a95af8a1; e27cca96cd68fa2c6814c90f9a1cfd36bb68c593 <c296d25efbc840be24de83f56d43bc47e714ace9; patch: 6.1.187; 5.6; patch: 7.2.3; e27cca96cd68fa2c6814c90f9a1cfd36bb68c593 <943d95233b8b4a88994e244fcf466f8c403d63f1; patch: 7.1.13; patch: 0; patch: 5.15.220; patch: 6.18.49; e27cca96cd68fa2c6814c90f9a1cfd36bb68c593 <2dd1609cadff46c4b20ce53b91ab9cce1380456a; e27cca96cd68fa2c6814c90f9a1cfd36bb68c593 <7911e0236616487b89db6bd3ba3f408abd10eb23; e27cca96cd68fa2c6814c90f9a1cfd36bb68c593 <6af5cdb03819a5ce6e945992635c6c5e91045367; e27cca96cd68fa2c6814c90f9a1cfd36bb68c593 <239d0f71af09dc2029fd4d730cb24b8c83aaa43a; patch: 5.10.269; e27cca96cd68fa2c6814c90f9a1cfd36bb68c593 <e1d7c5ac1c246ce5775f604515de0a59fbf2116e; patch: 6.12.108; patch: 6.6.156

The versions shown are the advisory's own. Patchlage compares no version numbers and derives no judgement from them — which version is installed is something a person has to look up.

Carried in the product catalogue

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Linux — Linux

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