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CVE-2026-98596: Linux

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    Описание

    Оригинално описание

    In the Linux kernel, the following vulnerability has been resolved: ipv6: Fix dst leak for uncached routes. ip6_route_output_flags(), ip6_rt_put_flags(), and ip6_dst_check() detect an uncached route by list_empty(&rt->dst.rt_uncached), which replaced the static DST_NOCACHE flag check in commit a4c2fd7f7891 ("net: remove DST_NOCACHE flag"). When a device is unregistered, rt6_uncached_list_flush_dev() unlinks uncached routes tied to the device from rt6_uncached_list. Previously, they were moved to another list with list_move() (__list_del_entry() + list_add()), and since commit 98aa546af5e4 ("inet: remove (struct uncached_list)->quarantine"), the routes are just unlinked with list_del_init(). If list_del_init() runs concurrently, list_empty() evaluates to true; ip6_route_output_flags() calls dst_hold_safe() incorrectly and ip6_rt_put_flags() skips ip6_rt_put(), leaking dst, and thus dev tied via rt->from as well. The same race is partially fixed by commit 9a6f0c4d5796 ("dst: fix races in rt6_uncached_list_del() and rt_del_uncached_list()"). Let's check rt6->dst.rt_uncached_list instead. Note that IPv4 does not have the same issue.

    Засегнати продукти

    • Linux Linux: 98aa546af5e4f180439c82da403cc77926d3953b преди 5045aa25f3790dcdb158a58ac60ccf8da42959aa; 98aa546af5e4f180439c82da403cc77926d3953b преди ed902d5546fb9c142b3216d8eec914fa1bc0aa80; 98aa546af5e4f180439c82da403cc77926d3953b преди f9722746df13a8a29103c847ef56b02c11ce0963; 98aa546af5e4f180439c82da403cc77926d3953b преди be31fe6333f534155e6b408f1ef6d77974bb41aa
    • Linux Linux: 6.11; преди 6.11; 6.12.112 до 6.12.*; 6.18.55 до 6.18.*; 7.2.9 до 7.2.*; от 7.3 нататък

    История

    • 18 октомври 2026 Публикувано

    Други уязвимости в Linux Linux

    Първоизточници

    CVE-2026-98596: Linux | freedomonline.bg