CVE-2026-97472
CVE CVE-2026-97472EUVD EUVD-2026-86070Published 2026-09-24T16:04:14.000Z
What the advisory describes
In the Linux kernel, the following vulnerability has been resolved: ipv6: addrconf: fix temp address generation after prefix deprecation When a router temporarily deprecates an IPv6 prefix (either by sending a Router Advertisement with Preferred Lifetime = 0 or by letting the lifetime expire) and later restores it, the kernel permanently loses its ability to generate temporary privacy addresses (RFC 8981) for that prefix. This happens because the address worker attempts to generate a replacement temporary address when the current one nears expiration. As the base prefix is deprecated already, the generation fails after marking the temporary address as already having spawned a replacement (ifp->regen_count++). When the router eventually restores the prefix, the temporary address becomes active again. However, once it naturally expires, the address worker sees this temporary address already tried to generate one and skips the regeneration. Fix the issue by resetting the regen_count check of the latest temp address generated for the prefix updated by the incoming RA.
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 0 <6.12.111; patch: 6.12.111; patch: 6.18.53; 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <bff7b87dfa28a1502c18d0c6f1fadda5162fa854; 0 <6.18.53; 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <4df5597c65446135362f72880995e8920f058fa0; 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <e20d8922aa8fe441d291364c96c2179a005b79ea; patch: 7.2
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
An estate covering these products can be recorded in Patchlage. An advisory about them appears in the next morning's situation report.
- Linux — Linux
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