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CVE-2026-31580: 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: bcache: fix cached_dev.sb_bio use-after-free and crash In our production environment, we have received multiple crash reports regarding libceph, which have caught our attention: ``` [6888366.280350] Call Trace: [6888366.280452] blk_update_request+0x14e/0x370 [6888366.280561] blk_mq_end_request+0x1a/0x130 [6888366.280671] rbd_img_handle_request+0x1a0/0x1b0 [rbd] [6888366.280792] rbd_obj_handle_request+0x32/0x40 [rbd] [6888366.280903] __complete_request+0x22/0x70 [libceph] [6888366.281032] osd_dispatch+0x15e/0xb40 [libceph] [6888366.281164] ? inet_recvmsg+0x5b/0xd0 [6888366.281272] ? ceph_tcp_recvmsg+0x6f/0xa0 [libceph] [6888366.281405] ceph_con_process_message+0x79/0x140 [libceph] [6888366.281534] ceph_con_v1_try_read+0x5d7/0xf30 [libceph] [6888366.281661] ceph_con_workfn+0x329/0x680 [libceph] ``` After analyzing the coredump file, we found that the address of dc->sb_bio has been freed. We know that cached_dev is only freed when it is stopped. Since sb_bio is a part of struct cached_dev, rather than an alloc every time. If the device is stopped while writing to the superblock, the released address will be accessed at endio. This patch hopes to wait for sb_write to complete in cached_dev_free. It should be noted that we analyzed the cause of the problem, then tell all details to the QWEN and adopted the modifications it made.

    Засегнати продукти

    • Linux Linux: cafe563591446cf80bfbc2fe3bc72a2e36cf1060 преди 81f44ed8c3f54abb7561ece774ea4cca5070b2f2; cafe563591446cf80bfbc2fe3bc72a2e36cf1060 преди f50e7c325ab1207fe941555bcff659f6d7050572; cafe563591446cf80bfbc2fe3bc72a2e36cf1060 преди 9467d360be70e6ee55b0c1cd2a1f1424f57b5b85; cafe563591446cf80bfbc2fe3bc72a2e36cf1060 преди 47fa09fe7f3e09df28a51cb2cbd8f5d2f7f6edc1; cafe563591446cf80bfbc2fe3bc72a2e36cf1060 преди add4982510f3b7c318a2dd7438bdc9c63171e753; cafe563591446cf80bfbc2fe3bc72a2e36cf1060 преди 2d6965581e164fa2ba3f7652ddae5535f6336576; cafe563591446cf80bfbc2fe3bc72a2e36cf1060 преди 4f71c8ba2dc009042493021d94a9718fbe2ebf27; cafe563591446cf80bfbc2fe3bc72a2e36cf1060 преди 383f7fec0de8cee1cf7ae1f9d9f14044a61f10f9; cafe563591446cf80bfbc2fe3bc72a2e36cf1060 преди fec114a98b8735ee89c75216c45a78e28be0f128
    • Linux Linux: 3.10; преди 3.10; 5.10.258 до 5.10.*; 5.15.209 до 5.15.*; 6.1.175 до 6.1.*; 6.6.136 до 6.6.*; 6.12.83 до 6.12.*; 6.18.24 до 6.18.*; 6.19.14 до 6.19.*; 7.0.1 до 7.0.*; 7.1 до *
    • Siemens SIMATIC S7-1500 TM MFP - GNU/Linux subsystem: преди *

    История

    • 24 април 2026 Публикувано

    Други уязвимости в Linux Linux

    Първоизточници

    CVE-2026-31580: Linux | freedomonline.bg