CVE-2026-97472

Status: UPDATED  |  Advisory ID: CVE-2026-97472

Key Details

Affected Products, Subsystems & Sectors

What to Know

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. (NVD)

What to Do

Monitor Linux's web page for any future patch releases.

References