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CVE-2026-68132: 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: super: fix emergency thaw deadlock on frozen block devices do_thaw_all_callback() calls bdev_thaw() while holding sb->s_umount exclusively. If the block device was frozen via bdev_freeze() dropping the last block layer freeze reference calls fs_bdev_thaw() which reacquires s_umount: do_thaw_all_callback(sb) super_lock_excl(sb) # holds sb->s_umount bdev_thaw(sb->s_bdev) mutex_lock(&bdev->bd_fsfreeze_mutex) # bd_fsfreeze_count drops 1 -> 0 bd_holder_ops->thaw == fs_bdev_thaw get_bdev_super(bdev) bdev_super_lock(bdev, true) super_lock(sb, true) down_write(&sb->s_umount) # same task: deadlock The emergency thaw worker deadlocks against itself holding both s_umount and bd_fsfreeze_mutex. That fscks any subsequent unmount, freeze, or thaw of that filesystem and block device. [ 81.878470] sysrq: Show Blocked State [ 81.880140] task:kworker/0:1 state:D stack:0 pid:11 tgid:11 ppid:2 task_flags:0x4208060 flags:0x00080000 [ 81.884876] Workqueue: events do_thaw_all [ 81.886656] Call Trace: [ 81.887759] <TASK> [ 81.888763] __schedule+0x579/0x1420 [ 81.890372] schedule+0x3a/0x100 [ 81.891794] schedule_preempt_disabled+0x15/0x30 [ 81.893848] rwsem_down_write_slowpath+0x1ea/0x900 [ 81.895191] ? __pfx_do_thaw_all_callback+0x10/0x10 [ 81.896528] down_write+0xbd/0xc0 [ 81.897505] super_lock+0x91/0x180 [ 81.898457] ? __mutex_lock+0xa99/0x1140 [ 81.900748] ? __mutex_unlock_slowpath+0x1f/0x400 [ 81.902069] bdev_super_lock+0x5b/0x150 [ 81.903132] get_bdev_super+0x10/0x60 [ 81.904042] fs_bdev_thaw+0x23/0xf0 [ 81.904755] bdev_thaw+0x82/0x100 [ 81.905484] do_thaw_all_callback+0x2c/0x50 [ 81.906298] __iterate_supers+0x5d/0x130 [ 81.907067] do_thaw_all+0x20/0x40 [ 81.907739] process_one_work+0x206/0x5e0

    Засегнати продукти

    • Linux Linux: 08fdc8a0138afaf324296a342f32ad26ec465e43 преди 96248aeddde794227a49af1a332a1e21b3c15d56; 08fdc8a0138afaf324296a342f32ad26ec465e43 преди c202aa03388fd1889b7aa4f7d677c49e22cd9700; 08fdc8a0138afaf324296a342f32ad26ec465e43 преди 2a1127c1c58b4f15a93f2fd56ff7c2c3d611d5c5; 08fdc8a0138afaf324296a342f32ad26ec465e43 преди 05536cad35f27b520d4b6f0e57c8cc5bfb6b0502; 08fdc8a0138afaf324296a342f32ad26ec465e43 преди 99719b5da9320ed344daee87d9c73d321a98f252; 08fdc8a0138afaf324296a342f32ad26ec465e43 преди 63d78b546eefc38ad9898dc839bfc94811ede547; 08fdc8a0138afaf324296a342f32ad26ec465e43 преди 4c483644d1a7709efe7d1be7dbf88cf4008a7864; 08fdc8a0138afaf324296a342f32ad26ec465e43 преди 749d7aa0377aae32af8c0a4ad43371e7bf830ab5
    • Linux Linux: 4.17; преди 4.17; 5.10.266 до 5.10.*; 5.15.217 до 5.15.*; 6.1.184 до 6.1.*; 6.6.153 до 6.6.*; 6.12.105 до 6.12.*; 6.18.42 до 6.18.*; 7.1.6 до 7.1.*; от 7.2 нататък

    История

    • 10 август 2026 Публикувано

    Други уязвимости в Linux Linux

    Първоизточници

    CVE-2026-68132: Linux | freedomonline.bg