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CVE-2026-90111: Linux

7.8

CVSS 3.1

Няма данни

Вероятност да бъде експлоатирана в следващите 30 дни (EPSS)

Няма потвърждение

Атакува се

Няма данни

Време до експлоатация

Атакува се локално, без особени условия, с обикновен потребителски вход и без действие от потребителя.

    Описание

    Оригинално описание

    In the Linux kernel, the following vulnerability has been resolved: ip6mr: do not clone dst in ip6mr_cache_report() IPv6 input attaches a non-refcounted (NOREF) dst to skbs under RCU. When an ingress multicast packet misses MFC lookup, ip6mr_cache_unresolved() places the skb onto the unresolved queue, escaping the receive-side RCU grace period. If the underlying route is deleted and freed, and the MFC queue is later resolved with a wrong parent interface, ip6_mr_forward() invokes ip6mr_cache_report(..., MRT6MSG_WRONGMIF), which executes dst_clone(skb_dst(pkt)) on the freed dst entry, triggering a slab use-after-free. Report packets queued to mroute6_sk (a raw socket) and netlink notifications do not require an attached dst entry. Fix this by: 1. Removing dst_clone() in ip6mr_cache_report() and ensuring report skbs do not hold a dst. 2. Dropping skb_dst before queuing unresolved skbs in ip6mr_cache_unresolved(), matching the fact that multicast forwarding resolves outgoing routes anew via ip6_route_output().

    Засегнати продукти

    • Linux Linux: 67f415dd29063a5906c560051c00e42dcf01a4dd преди b50d3cfb8513e895cee453dd0f834deee6ccc231; 67f415dd29063a5906c560051c00e42dcf01a4dd преди 7f8287f606c8c028d4224e85d95dc448c6d6d623; 67f415dd29063a5906c560051c00e42dcf01a4dd преди 42ef371466d5648f5c9e8bc219f0af0a2c2bbf8c; 67f415dd29063a5906c560051c00e42dcf01a4dd преди f57b0fd1c62e1be274ee154ab7fb8ac4481b7f89; 67f415dd29063a5906c560051c00e42dcf01a4dd преди 4a674afaae4136c71943aa3e35d433676fd40e8f; 67f415dd29063a5906c560051c00e42dcf01a4dd преди 235b42b5860189eb8c27c36435ad932cae65a734
    • Linux Linux: 5.3; преди 5.3; 6.1.191 до 6.1.*; 6.6.160 до 6.6.*; 6.12.114 до 6.12.*; 6.18.57 до 6.18.*; 7.2.6 до 7.2.*; от 7.3 нататък

    История

    • 17 септември 2026 Публикувано

    Други уязвимости в Linux Linux

    Първоизточници

    CVE-2026-90111: Linux | freedomonline.bg