Linux/Unix 主機上安裝了一個或多個受到弱點影響的套件，且供應商未提供可用的修補程式。

  - btrfs不在 link_to_fixup_dir 中執行 BUG_ON。進行錯誤插入測試時我在 fs/btrfs/tree-log.c:1862! 遇到下列錯誤核心錯誤無效 opcode0000 [#1] SMP NOPTI CPU1 PID7836 Commmount 未受污染的 5.13.0-rc1+ #305 硬體名稱QEMU Standard PC (Q35 + ICH9, 2009)BIOS 1.13.0-2。 fc32 04/01/2014 RIP0010:link_to_fixup_dir+0xd5/0xe0 RSP: 0018:ffffb5800180fa30 EFLAGS: 00010216 RAX
    fffffffffffffffb RBX: 00000000fffffffb RCX: ffff8f595287faf0 RDX: ffffb5800180fa37 RSI: ffff8f5954978800 RDI: 0000000000000000 RBP: ffff8f5953af9450 R08: 0000000000000019 R09: 0000000000000001 R10:
     R11000151f408682970  : 0000000120021001 R12: ffff8f5954978800 R13: ffff8f595287faf0 R14: ffff8f5953c77dd0 R15: 0000000000000065 FS: 00007fc5284c8c40(0000) GS:ffff8f59bbd00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fc5287f47c0 CR3: 000000011275e002 CR4: 0000000000370ee0 呼叫追踪replay_one_buffer+0x409/0x470 btree_read_extent_buffer_pages+0xd0/0x110 walk_up_log_tree+0x157/0x1e0 walk_log_tree+0xa6/0x1d0 btrfs_recover_log_trees+0x1da/0x360 replay_one_extent+0x7b0/0x7b0 open_ctree+0x1486/0x1720 btrfs_mount_root.cold+0x12/0xea
    __kmalloc_track_caller+0x12f/0x240 legacy_get_tree+0x24/0x40 vfs_get_tree+0x22/0xb0 vfs_kern_mount.part.0+0x71/0xb0 btrfs_mount+0x10d/0x380 vfs_parse_fs_string+0x4d/0x90 legacy_get_tree+0x24/0x40 vfs_get_tree+0x22/0xb0 path_mount+0x433/0xa10 __x64_sys_mount+0xe3/0x120 do_syscall_64+0x3d/0x80 entry_SYSCALL_64_after_hwframe+0x44/0xae We can get -EIO or any number of legitimate errors from btrfs_search_slot()此處錯誤並非適當的回應。此程式碼的錯誤路徑會正確處理錯誤只會傳回錯誤。 (CVE-2021-47145)

請注意，Nessus 依賴供應商報告的套件存在。

偵測

Linux Distros 未修補的弱點：CVE-2021-47145

medium Nessus Plugin ID 245935

版本 1.1