CVE-2026-74581

CVE CVE-2026-74581EUVD EUVD-2026-64003Published 2026-08-21T16:31:54.000ZLast changed 2026-08-25T05:40:07.000ZCVSS 9.8

What the advisory describes

In the Linux kernel, the following vulnerability has been resolved: net: ipv6: clear suppressed fib6 rule result fib6_rule_suppress() drops a suppressed route with ip6_rt_put_flags(), but leaves res->rt6 pointing at the released rt6_info. If no later rule supplies a replacement, fib6_rule_lookup() still sees res.rt6 and returns that stale dst to its caller. A suppressing rule can therefore leak a released route back to rt6_lookup(), and the next put hits rcuref_put_slowpath() from dst_release(). Clear res->rt6 when suppressing the route so suppressed lookups fall through to the null dst instead of reusing the released one.

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 patch: 6.6.151; 5.10.84 <5.10.265; ee38eb8cf9a7323884c2b8e0adbbeb2192d31e29; patch: 6.18.44; patch: 0; 5.4.164 <5.5; patch: 5.15.216; 8ef8a76a340ebdb2c2eea3f6fb0ebbed09a16383 <5d29b286c9de0b309e94b9ed083aa1a2f429434f; 5.16; cdef485217d30382f3bf6448c54b4401648fe3f1 <6d98c70fe0ba8c7708bfd5b2a5174d2086775daa; cdef485217d30382f3bf6448c54b4401648fe3f1 <a341c091ca0bfae377747b1b59a3bd8ebe18a937; cdef485217d30382f3bf6448c54b4401648fe3f1 <dc3ab04220667f254f4348572b2a0b3febff89fb; cdef485217d30382f3bf6448c54b4401648fe3f1 <9bad152c42b37499162367fe47867411e62fffa3; patch: 5.10.265; patch: 7.2; patch: 7.1.8; cdef485217d30382f3bf6448c54b4401648fe3f1 <6aea62e433fe1b586202a5fee8b5807ce635e1d7; patch: 6.1.183; 209d35ee34e25f9668c404350a1c86d914c54ffa <90c57310e266eb94e4a80d6b15a9ca131d2e82cb; cdef485217d30382f3bf6448c54b4401648fe3f1 <354db6243eca59e9d187ffbf8b7955b044ce84dc; patch: 6.12.103; 5.15.7 <5.15.216

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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