CVE-2026-97472ipv6: addrconf: fix temp address generation after prefix deprecation
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No exploitation reported and no EPSS estimate yet.
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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.
- CVSS
- Not yet scored
- Weakness (CWE)
- Not given
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- Linux
- NVD analysis
- Received
- Record last updated
- Oct 3, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
Linux Linux linux:linux (from the name) | from 76f793e3a47139d340185cbc1a314740c09b13d3 before b00f7c1da82a809156f785ed37536c2d2584927d; 76f793e3a47139d340185cbc1a314740c09b13d3 builds before 6da8ba900b85e6478e211427630c67595fb707a4; 76f793e3a47139d340185cbc1a314740c09b13d3 builds before 4f7d2a8dc364c4e55d0a1533451339008512933f; from 76f793e3a47139d340185cbc1a314740c09b13d3 before f601ec5c92b3260c742f27a5d2fd289e30ae798f; from 76f793e3a47139d340185cbc1a314740c09b13d3 before bff7b87dfa28a1502c18d0c6f1fadda5162fa854; 76f793e3a47139d340185cbc1a314740c09b13d3 builds before 4df5597c65446135362f72880995e8920f058fa0; from 76f793e3a47139d340185cbc1a314740c09b13d3 before e20d8922aa8fe441d291364c96c2179a005b79ea | CNA record |
References
- https://git.kernel.org/stable/c/b00f7c1da82a809156f785ed37536c2d2584927d
- https://git.kernel.org/stable/c/6da8ba900b85e6478e211427630c67595fb707a4
- https://git.kernel.org/stable/c/4f7d2a8dc364c4e55d0a1533451339008512933f
- https://git.kernel.org/stable/c/f601ec5c92b3260c742f27a5d2fd289e30ae798f
- https://git.kernel.org/stable/c/bff7b87dfa28a1502c18d0c6f1fadda5162fa854
- https://git.kernel.org/stable/c/4df5597c65446135362f72880995e8920f058fa0
- https://git.kernel.org/stable/c/e20d8922aa8fe441d291364c96c2179a005b79ea
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.