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。

  - udmabuf為 udmabuf 裝置 (v2) 設定 DMA 遮罩 如果未明確設定 DMA 遮罩當使用者空間嘗試透過 CPU 存取 dma-buf 時會出現下列警告如 syzbot 在此處所報告
    警告CPU1 PID3595 at kernel/dma/mapping.c:188 __dma_map_sg_attrs+0x181/0x1f0 kernel/dma/mapping.c:188 連結的模組CPU0 PID3595 Comm: syz-executor249 未受污染的 5.17 .0-rc2-syzkaller-00316-g0457e5153e0e #0 硬體名稱Google Google Compute Engine/Google Compute Engine、BIOS Google 01/01/2011 RIP0010:__dma_map_sg_attrs+0x181/0x1f0 kernel/dma/mapping.c:188 程式碼00 00 00 00 00 fc ff df 48 c1 e8 03 80 3c 10 00 75 71 4c 8b 3d c0 83 b5 0d e9 db fe ff ff e8 b6 0f 13 00 0f 0b e8 af 0f 13 00 <0f> 0b 45 31 e4 e9 54 ff ff ff e8 a0 0f 13 00 49 8d 7f 50 48 b8 00 RSP
    0018:ffffc90002a07d68 EFLAGS: 00010293 RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000 RDX: ffff88807e25e2c0 RSI: ffffffff81649e91 RDI: ffff88801b848408 RBP: ffff88801b848000 R08:
     R090000000000000002  : ffff88801d86c74f R10: ffffffff81649d72 R11: 0000000000000001 R12: 0000000000000002 R13: ffff88801d86c680 R14: 0000000000000001 R15: 0000000000000000 FS: 0000555556e30300(0000) GS:ffff8880b9d00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2:
    00000000200000cc CR3: 000000001d74a000 CR4: 00000000003506e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: <TASK> dma_map_sgtable+0x70/0xf0 kernel/dma/mapping.c:264 get_sg_table.isra.0+ 0xe0/0x160 drivers/dma-buf/udmabuf.c:72begin_cpu_udmabuf+0x130/0x1d0 drivers/dma-buf/udmabuf.c:126 dma_buf_begin_cpu_access+0xfd/0x1d0 drivers/dma-buf/dma-buf.c:1164 dma_buf_ioctl+ 0x259/0x2b0 drivers/dma-buf/dma-buf.c:363 vfs_ioctl fs/ioctl.c:51 [內嵌] __do_sys_ioctl fs/ioctl.c:874 [內嵌] __se_sys_ioctl fs/ioctl.c:860 [內嵌] __x64_sys_ioctl +0x193/0x200 fs/ioctl.c:860 do_syscall_x64 arch/x86/entry/common.c:50 [內嵌] do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x44/0xae RIP0033 :0x7f62fcf530f9 程式碼28 c3 e8 2a 14 00 00 66 2e 0f 1f 84 00 00 00 00 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 3 4c 8b 4c 2 <48> [ 3 0 10 8b 4c 2] f0 ff ff 73 01 c3 48 c7 c1 c0 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007ffe3edab9b8 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 0000000000000000 RCX00007f62fcf53:f9 RDX00007f62fcf53:0
    0000000020000200 RSI: 0000000040086200 RDI: 0000000000000006 RBP: 00007f62fcf170e0 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00007f62fcf17170 R13:
    0000000000000000 R140000000000000000 R15: 0000000000000000 </TASK> v2如果 DMA 遮罩設定失敗不要忘記取消註冊。 (CVE-2022-49983)

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-2022-49983

medium Nessus Plugin ID 247709

版本 1.8