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CVE-2026-53089: 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: bpf: Fix use-after-free in offloaded map/prog info fill When querying info for an offloaded BPF map or program, bpf_map_offload_info_fill_ns() and bpf_prog_offload_info_fill_ns() obtain the network namespace with get_net(dev_net(offmap->netdev)). However, the associated netdev's netns may be racing with teardown during netns destruction. If the netns refcount has already reached 0, get_net() performs a refcount_t increment on 0, triggering: refcount_t: addition on 0; use-after-free. Although rtnl_lock and bpf_devs_lock ensure the netdev pointer remains valid, they cannot prevent the netns refcount from reaching zero. Fix this by using maybe_get_net() instead of get_net(). maybe_get_net() uses refcount_inc_not_zero() and returns NULL if the refcount is already zero, which causes ns_get_path_cb() to fail and the caller to return -ENOENT -- the correct behavior when the netns is being destroyed.

    Засегнати продукти

    • Linux Linux: 675fc275a3a2d905535207237402c6d8dcb5fa4b преди 43d6848a2a6c92ccfd614d9f0bb6fd85b95dfa9d; 675fc275a3a2d905535207237402c6d8dcb5fa4b преди 642943ae5bdacabc8109dc4a5e0ebb4a6b99ef3e; 675fc275a3a2d905535207237402c6d8dcb5fa4b преди fea55b034328feaafef75aee252f305e6f85a991; 675fc275a3a2d905535207237402c6d8dcb5fa4b преди 5662dac41a3442aa378d7c405164903eb109fc05; 675fc275a3a2d905535207237402c6d8dcb5fa4b преди 1a2dc103e16448d022a77ad5fc3234641436c4b7; 675fc275a3a2d905535207237402c6d8dcb5fa4b преди 85dc711f742b192eb97c0e00b521312f5a7a415e; 675fc275a3a2d905535207237402c6d8dcb5fa4b преди a51e7fbe94a87e236631a83973d4f558310b2cd2; 675fc275a3a2d905535207237402c6d8dcb5fa4b преди a0c584fc18056709c8e047a82a6045d6c209f4ce
    • Linux Linux: 4.16; преди 4.16; 5.10.269 до 5.10.*; 5.15.220 до 5.15.*; 6.1.187 до 6.1.*; 6.6.156 до 6.6.*; 6.12.108 до 6.12.*; 6.18.49 до 6.18.*; 7.0.10 до 7.0.*; от 7.1 нататък

    История

    • 24 юни 2026 Публикувано

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    Първоизточници

    CVE-2026-53089: Linux | freedomonline.bg