CVE-2026-80846
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…
Does this matter?
Not yet scored. NVD analysis is pending; check back once CVSS and EPSS values are published.
Description
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.
- CVSS
- Not yet scored
- EPSS
- 0.19% probability · 9th percentile
- CISA KEV
- Not listed
- Source
- 416baaa9-dc9f-4396-8d5f-8c081fb06d67
References
- https://git.kernel.org/stable/c/239d0f71af09dc2029fd4d730cb24b8c83aaa43a
- https://git.kernel.org/stable/c/2dd1609cadff46c4b20ce53b91ab9cce1380456a
- https://git.kernel.org/stable/c/328e40aa774b446969c69b654c52a051a95af8a1
- https://git.kernel.org/stable/c/6af5cdb03819a5ce6e945992635c6c5e91045367
- https://git.kernel.org/stable/c/7911e0236616487b89db6bd3ba3f408abd10eb23
- https://git.kernel.org/stable/c/943d95233b8b4a88994e244fcf466f8c403d63f1
- https://git.kernel.org/stable/c/c296d25efbc840be24de83f56d43bc47e714ace9
- https://git.kernel.org/stable/c/e1d7c5ac1c246ce5775f604515de0a59fbf2116e
- https://git.kernel.org/stable/c/f00235f9d12301183d61f75fbe4105506f3e5140
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.