CVE-2026-74597

CVE CVE-2026-74597EUVD EUVD-2026-64534Published 2026-08-22T15:31:47.000ZLast changed 2026-08-25T05:40:23.000ZCVSS 9.8

What the advisory describes

In the Linux kernel, the following vulnerability has been resolved: ip6_tunnel: clear skb2->cb[] in ip6ip6_err() ip6ip6_err() clones an outer IPv6 ICMP error skb, pulls it to the quoted inner IPv6 packet, and then passes the clone to icmpv6_send(). The clone still carries the outer packet's inet6_skb_parm in skb->cb. If the outer packet had a Home Address Option, IP6CB(skb2)->dsthao remains non-zero after skb_pull(). icmpv6_send() later calls mip6_addr_swap(), which uses that stale dsthao offset against the quoted inner packet. A malformed inner destination-options header can then make the HAO lookup and address swap run past the end of the quoted packet and corrupt skb_shared_info. Clear skb2->cb[] before pulling the quoted inner IPv6 packet so the reply path does not reuse metadata left by the outer IPv6 stack.

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 2.6.22; e490d1d85cf5e191791979e5f260d32eb4f703a8 <64e41736a26f37ab6215bc2e6df125df05aceb08; e490d1d85cf5e191791979e5f260d32eb4f703a8 <b6816536a2990c0db44a26130a03e40b441e829b; e490d1d85cf5e191791979e5f260d32eb4f703a8 <fbf40faa0414b753212494ad197542002e66ed9e; patch: 0; e490d1d85cf5e191791979e5f260d32eb4f703a8 <f803c086399da277b5d0ff36a107d0f162751800; patch: 7.1.9; patch: 5.10.265; e490d1d85cf5e191791979e5f260d32eb4f703a8 <484134e1eb07d700a73b1e4bbf3fb503e299be60; patch: 6.12.104; e490d1d85cf5e191791979e5f260d32eb4f703a8 <44fe898df302e91c5ee5acbc71ffa74e78e6c183; patch: 6.1.183; e490d1d85cf5e191791979e5f260d32eb4f703a8 <0dadb0620ab65949a8bc2439dd28ea3c942fe87d; patch: 7.2; patch: 6.18.45; e490d1d85cf5e191791979e5f260d32eb4f703a8 <4eb15c465337b18f44716c499cd6ad63eee0ad54; patch: 5.15.216; patch: 6.6.152

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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