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CVE-2026-99139: Linux

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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: tcp: fix use-after-free in do_tcp_getsockopt(TCP_CONGESTION) do_tcp_getsockopt() reads icsk->icsk_ca_ops->name without holding rcu_read_lock(). Since commit 0baf26b0fcd7 ("bpf: tcp: Support tcp_congestion_ops in bpf"), icsk_ca_ops can point to dynamically allocated BPF struct_ops memory that may be freed concurrently via setsockopt(TCP_CONGESTION), leading to a use-after-free. BUG: KASAN: slab-use-after-free in _copy_to_user+0x37/0x60 Read of size 16 at addr ffff888013505260 by task exploit/149 _copy_to_user+0x37/0x60 do_tcp_getsockopt+0x158a/0x2460 (net/ipv4/tcp.c:4585) tcp_getsockopt+0x91/0xf0 __sys_getsockopt+0xf7/0x170 Fix this by holding rcu_read_lock() around the ca_ops->name access, using READ_ONCE() to load icsk_ca_ops, and copying the name to a stack buffer before releasing the lock. Also annotate the relevant icsk_ca_ops stores with WRITE_ONCE() to fix the accompanying KCSAN data-race issue.

    Засегнати продукти

    • Linux Linux: 0baf26b0fcd74bbfcef53c5d5e8bad2b99c8d0d2 преди a60e62705c17534d6b6539de7b3a40c259e6827f; 0baf26b0fcd74bbfcef53c5d5e8bad2b99c8d0d2 преди 4b0930d66dde0a1d1898f0edbbb5496c4dfa5f03; 0baf26b0fcd74bbfcef53c5d5e8bad2b99c8d0d2 преди 08dc5c62c09653d1c4ba67a009beb138486c2604; 0baf26b0fcd74bbfcef53c5d5e8bad2b99c8d0d2 преди c1804ef016392dd91267d2207ee43b1de34302ca; 0baf26b0fcd74bbfcef53c5d5e8bad2b99c8d0d2 преди a8e45471afa230c1431c26c8e99ec24377e3b514; 0baf26b0fcd74bbfcef53c5d5e8bad2b99c8d0d2 преди 5271b79b7ad68dcb222e893773f92bdabf7750f3
    • Linux Linux: 5.6; преди 5.6; 6.1.191 до 6.1.*; 6.6.161 до 6.6.*; 6.12.115 до 6.12.*; 6.18.59 до 6.18.*; 7.2.13 до 7.2.*; 7.3 до *

    История

    • 28 октомври 2026 Публикувано

    Други уязвимости в Linux Linux

    Първоизточници

    CVE-2026-99139: Linux | freedomonline.bg