{"apiVersion":"1.0","identifier":"CVE-2026-74581","description":"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.","publishedAt":"2026-08-21T17:16:44","lastModifiedAt":"2026-08-25T06:18:31","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-74581","cvssScore":9.8,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","epssProbability":0.00399,"riskScore":1.02,"affectedProduct":"Linux kernel","affectedVersions":"unknown","vulnerabilityType":"Kernel","operatingSystems":[],"links":{"self":"https://www.redsauce.net/api/cves/CVE-2026-74581","webPages":{"es":"https://www.redsauce.net/es/cves/CVE-2026-74581","en":"https://www.redsauce.net/en/cves/CVE-2026-74581","fr":"https://www.redsauce.net/fr/cves/CVE-2026-74581","pt":"https://www.redsauce.net/pt/cves/CVE-2026-74581","de":"https://www.redsauce.net/de/cves/CVE-2026-74581","sk":"https://www.redsauce.net/sk/cves/CVE-2026-74581","el":"https://www.redsauce.net/el/cves/CVE-2026-74581"},"source":"https://nvd.nist.gov/vuln/detail/CVE-2026-74581"}}