Linux/Unix 主机中安装的一个或多个程序包受到一个漏洞影响，而供应商没有提供补丁程序。

  - mt76mt7921修复 mt7921_pci_remove 时的内核崩溃 崩溃日志显示在处理 devm_free_irq 时可能调用 mt7921_irq_handler因此 mt76_free_device 需要推迟到 devm_free_irq 完成为止以解决过早释放 mt76 设备的崩溃问题。 [ 9299.339655] 缺陷
    内核空指针取消引用地址0000000000000008 [ 9299.339705] #PF内核模式中存在主管读取访问权限 [ 9299.339735] #PFerror_code(0x0000) - 不存在页面 [ 9299.339768] PGD 0 P4D 0 [9299.339786] Oops 0000 [#1] SMP PTI [ 9299.339812] CPU: 1 PID: 1624 Comm prepare-suspend Not tainted 5.15.14-1.fc32.qubes.x86_64 #1 [ 9299.339863] 硬件名称Xen HVM domU、BIOS 4.14.3 01/20/2022 [9299.339901] RIP: 0010:mt7921_irq_handler+0x1e/0x70 [mt7921e] [ 9299.340048] RSP: 0018:ffffa81b80c27cb0 EFLAGS: 00010082 [ 9299.340081] RAX: 0000000000000000 RBX: ffff98a4cb752020 RCX: ffffffffa96211c5 [9299.340123] RDX: 0000000000000000 RSI: 00000000000d4204 RDI: ffff98a4cb752020 [ 9299.340165] RBP
    ffff98a4c28a62a4 R08ffff98a4c37a96c0 R090000000080150011 [ 9299.340207] R100000000040000000 R11
    0000000000000000 R12ffff98a4c4eaa080 [ 9299.340249] R13ffff98a4c28a6360 R14ffff98a4cb752020 R15
    ffff98a4c28a6228 [ 9299.340297] FS: 00007260840d3740(0000) GS:ffff98a4ef700000(0000) knlGS:0000000000000000 [ 9299.340345] CS: 0010 DS: 0000 ES: 0000 CR0: 000000000 [ 9299.3403833] CR3]
    0000000000000008 CR3: 0000000004c56001 CR4: 0000000000770ee0 [ 9299.340432] PKRU: 55555554 [ 9299.340449] 调用跟踪[ 9299.340467] <TASK> [ 9299.340485] __free_irq+0x221/0x350 9299.340527] devm_irq+0x_free] 9299.340553[ +0x55/0x80 [ 9299.340579] mt7921_pci_remove+0x2f/0x40 [mt7921e] [ 9299.340616] pci_device_remove+0x3b/0xa0 [ 9299.340651] __device_release_driver+0x17a/0x240 [ 9299.340686] device_driver_detach+0x3c/0xa0 [ 9299.340714] unbind_store+0x113 /0x130 [ 9299.340740] kernfs_fop_write_iter+0x124/0x1b0 [ 9299.340775] new_sync_write+0x15c/0x1f0 [ 9299.340806] vfs_write+0x1d2/0x270 [ 9299.340831] ksys_write+0x67/0xe0 [ 9299.340857] do_syscall_64+0x3b/0x90 [9299.340887] entry_SYSCALL_64_after_hwframe+0x44/0xae (CVE-2022-49476)

请注意，Nessus 依赖供应商报告的程序包是否存在进行判断。

检测

Linux Distros 未修补的漏洞：CVE-2022-49476

medium Nessus 插件 ID 226943

版本 1.14