CVE-2026-97472 (GCVE-0-2026-97472)

Vulnerability from cvelistv5 – Published: 2026-09-24 16:04 – Updated: 2026-10-03 10:58
VLAI
Title
ipv6: addrconf: fix temp address generation after prefix deprecation
Summary
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.
Severity
No CVSS data available.
Assigner
Linux CNA under the mitre root
CNA scorecard D 53/100 over 6641 records in the last 180 days details
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: 76f793e3a47139d340185cbc1a314740c09b13d3 , < b00f7c1da82a809156f785ed37536c2d2584927d (git)
Affected: 76f793e3a47139d340185cbc1a314740c09b13d3 , < 6da8ba900b85e6478e211427630c67595fb707a4 (git)
Affected: 76f793e3a47139d340185cbc1a314740c09b13d3 , < 4f7d2a8dc364c4e55d0a1533451339008512933f (git)
Affected: 76f793e3a47139d340185cbc1a314740c09b13d3 , < f601ec5c92b3260c742f27a5d2fd289e30ae798f (git)
Affected: 76f793e3a47139d340185cbc1a314740c09b13d3 , < bff7b87dfa28a1502c18d0c6f1fadda5162fa854 (git)
Affected: 76f793e3a47139d340185cbc1a314740c09b13d3 , < 4df5597c65446135362f72880995e8920f058fa0 (git)
Affected: 76f793e3a47139d340185cbc1a314740c09b13d3 , < e20d8922aa8fe441d291364c96c2179a005b79ea (git)
guessed Create a notification for this product.
Linux Linux Affected: 3.2
Unaffected: 0 , < 3.2 (semver)
Unaffected: 5.10.271 , ≤ 5.10.* (semver)
Unaffected: 5.15.222 , ≤ 5.15.* (semver)
Unaffected: 6.1.189 , ≤ 6.1.* (semver)
Unaffected: 6.6.158 , ≤ 6.6.* (semver)
Unaffected: 6.12.111 , ≤ 6.12.* (semver)
Unaffected: 6.18.53 , ≤ 6.18.* (semver)
Unaffected: 7.2 , ≤ * (original_commit_for_fix)
guessed Create a notification for this product.
Show details on NVD website
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        }
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}



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