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CVE-2026-74657: Linux

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CVSS

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Вероятност да бъде експлоатирана в следващите 30 дни (EPSS)

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Време до експлоатация

    Описание

    Оригинално описание

    In the Linux kernel, the following vulnerability has been resolved: ipv4: Fix fib_nlmsg_size() for RTA_VIA nexthops fib_nlmsg_size() still estimates nexthop space as if every gateway is encoded as an IPv4 RTA_GATEWAY attribute. IPv4 routes can also carry an IPv6 gateway, which fib_nexthop_info() dumps as RTA_VIA. As a result, route notifications can allocate an skb that is too small. fib_dump_info() then fails with -EMSGSIZE and rtmsg_fib() hits the WARN_ON() that marks such failures as a fib_nlmsg_size() bug. With panic_on_warn set, this becomes a kernel panic. Mirror the actual nexthop dump layout in fib_nlmsg_size(): account for IPv6 nexthop gateways dumped as RTA_VIA, for the no-header rtnexthop layout used inside RTA_MULTIPATH, and for RTA_FLOW only when it is actually present.

    Засегнати продукти

    • Linux Linux: d15662682db232da77136cd348f4c9df312ca6f9 преди 57195f0ab5cfbb5ee0864e5aff15ceb48f5a5e28; d15662682db232da77136cd348f4c9df312ca6f9 преди 0f0ca602941d0a81ae9514943ca06c55159c6385; d15662682db232da77136cd348f4c9df312ca6f9 преди 5307a53599fa762c06e475ee4a375252074fd324; d15662682db232da77136cd348f4c9df312ca6f9 преди 7f80ad373ce4a7af5367ff273cea0f16e91387f3; d15662682db232da77136cd348f4c9df312ca6f9 преди 4a5dfbae5179f6574695012a980476254df2d295; d15662682db232da77136cd348f4c9df312ca6f9 преди a59edda6eda1252340354322d8ab318b2e9052fb; d15662682db232da77136cd348f4c9df312ca6f9 преди 9b22f13524fa0de0d963bbd3002df6c28bae3395; d15662682db232da77136cd348f4c9df312ca6f9 преди 4ff9548d84945d2cbf9e4c207288063a200ea397
    • Linux Linux: 5.2; преди 5.2; 5.10.267 до 5.10.*; 5.15.216 до 5.15.*; 6.1.183 до 6.1.*; 6.6.152 до 6.6.*; 6.12.104 до 6.12.*; 6.18.45 до 6.18.*; 7.1.9 до 7.1.*; от 7.2 нататък

    История

    • 22 август 2026 Публикувано

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