{"apiVersion":"1.0","identifier":"CVE-2026-72429","description":"In the Linux kernel, the following vulnerability has been resolved: ipv6: ioam: fix type confusion of dst_entry IOAM uses a dummy dst_entry(null_dst) to mark that the destination should not be changed after the transformation. This dst is stored in the IOAM lwt state and may be passed to dst_cache_set_ip6(). However, the IPv6 dst cache path eventually calls rt6_get_cookie(), which treats the dst_entry as part of a struct rt6_info. Since the null_dst was embedded directly as a struct dst_entry in struct ioam6_lwt, this resulted in an invalid cast and rt6_get_cookie() reading fields from the wrong object. In practice, the wrong cookie is not used while dst->obsolete is zero, but rt6_get_cookie() may also access per-cpu value when rt->sernum is zero. In this case, rt->sernum aliases ioam6_lwt::cache::reset_ts, which can become zero, making this a potential invalid pointer access. Fix this by embedding a full struct rt6_info for the dummy IPv6 route and passing its dst member to the dst APIs.","publishedAt":"2026-08-15T06:22:16","lastModifiedAt":"2026-08-17T06:19:10","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-72429","cvssScore":9.8,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","epssProbability":0.00605,"riskScore":1.03,"affectedProduct":"Linux kernel","affectedVersions":"unknown","vulnerabilityType":"Kernel","operatingSystems":[],"links":{"self":"https://www.redsauce.net/api/cves/CVE-2026-72429","webPages":{"es":"https://www.redsauce.net/es/cves/CVE-2026-72429","en":"https://www.redsauce.net/en/cves/CVE-2026-72429","fr":"https://www.redsauce.net/fr/cves/CVE-2026-72429","pt":"https://www.redsauce.net/pt/cves/CVE-2026-72429","de":"https://www.redsauce.net/de/cves/CVE-2026-72429","sk":"https://www.redsauce.net/sk/cves/CVE-2026-72429","el":"https://www.redsauce.net/el/cves/CVE-2026-72429"},"source":"https://nvd.nist.gov/vuln/detail/CVE-2026-72429"}}