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CVE-2026-80792: Linux

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CVSS

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Вероятност да бъде експлоатирана в следващите 30 дни (EPSS)

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    Описание

    Оригинално описание

    In the Linux kernel, the following vulnerability has been resolved: ipv6: fix use-after-free in ip6_finish_output2() ip6_finish_output2() caches a pointer to the IPv6 destination address (daddr) before invoking lwtunnel_xmit(). The LWT-BPF transmit path or other encapsulation operations within lwtunnel_xmit() can reallocate the skb head, freeing the memory that daddr points to. When lwtunnel_xmit() returns LWTUNNEL_XMIT_CONTINUE, the function continues to use the stale daddr pointer to compute the nexthop and to look up or create the neighbour entry. This results in a use-after-free read, which can leak sensitive kernel data, pollute the neighbour table with arbitrary values, misdirect traffic, or crash the system. Fix this by re-fetching the IPv6 header and the destination address pointer after lwtunnel_xmit() returns LWTUNNEL_XMIT_CONTINUE, ensuring that the subsequent nexthop computation and neighbour lookup operate on valid memory.

    Засегнати продукти

    • Linux Linux: 4132c4ad00ddbf3a175ea0d2c775b662a32f4c85 преди 75e0a544ebe9af663ef53ca21e9e9185c51fb54a; e415ed3a4b8b246ee5e9d109ff5153efcf96b9f2 преди c95f01b78266828a57060d754fcbfc92123a98ed; e415ed3a4b8b246ee5e9d109ff5153efcf96b9f2 преди d960881b9312e781a3429aabceb223ce6b7c882f; e415ed3a4b8b246ee5e9d109ff5153efcf96b9f2 преди 087ee0d914aaae929f1660c9ca878e367655ba1a; e415ed3a4b8b246ee5e9d109ff5153efcf96b9f2 преди 3c770ac4e6f07af7c7b40c474a3efc61ffed7862; e415ed3a4b8b246ee5e9d109ff5153efcf96b9f2 преди 3dc98e5fe82d069dd29b124ffbdb679331dfea43; e415ed3a4b8b246ee5e9d109ff5153efcf96b9f2 преди 99219c82804f266189388e8bf1cf5135d10d5515; e415ed3a4b8b246ee5e9d109ff5153efcf96b9f2 преди 73a187384a8c8b983c7fea046d716b6752a1e7a3; e415ed3a4b8b246ee5e9d109ff5153efcf96b9f2 преди d0d48d999b0eee6bb176ef4e39d9be868fa80f7e; 1598154fd28ffa4a55beae1970475fd6776554b6; 5.10.233 преди 5.10.267; 5.4.289 преди 5.5
    • Linux Linux: 5.15; преди 5.15; 5.10.267 до 5.10.*; 5.15.218 до 5.15.*; 6.1.185 до 6.1.*; 6.6.154 до 6.6.*; 6.12.106 до 6.12.*; 6.18.47 до 6.18.*; 7.1.11 до 7.1.*; 7.2.1 до 7.2.*; от 7.3 нататък

    История

    • 4 септември 2026 Публикувано

    Други уязвимости в Linux Linux

    Първоизточници

    CVE-2026-80792: Linux | freedomonline.bg