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National Vulnerability Database

National Vulnerability Database

NVD

National Vulnerability Database
  1. Vulnerabilities

CVE-2022-50636 Detail

Description

In the Linux kernel, the following vulnerability has been resolved: PCI: Fix pci_device_is_present() for VFs by checking PF pci_device_is_present() previously didn't work for VFs because it reads the Vendor and Device ID, which are 0xffff for VFs, which looks like they aren't present. Check the PF instead. Wei Gong reported that if virtio I/O is in progress when the driver is unbound or "0" is written to /sys/.../sriov_numvfs, the virtio I/O operation hangs, which may result in output like this: task:bash state:D stack: 0 pid: 1773 ppid: 1241 flags:0x00004002 Call Trace: schedule+0x4f/0xc0 blk_mq_freeze_queue_wait+0x69/0xa0 blk_mq_freeze_queue+0x1b/0x20 blk_cleanup_queue+0x3d/0xd0 virtblk_remove+0x3c/0xb0 [virtio_blk] virtio_dev_remove+0x4b/0x80 ... device_unregister+0x1b/0x60 unregister_virtio_device+0x18/0x30 virtio_pci_remove+0x41/0x80 pci_device_remove+0x3e/0xb0 This happened because pci_device_is_present(VF) returned "false" in virtio_pci_remove(), so it called virtio_break_device(). The broken vq meant that vring_interrupt() skipped the vq.callback() that would have completed the virtio I/O operation via virtblk_done(). [bhelgaas: commit log, simplify to always use pci_physfn(), add stable tag]


Metrics

 
NVD enrichment efforts reference publicly available information to associate vector strings. CVSS information contributed by other sources is also displayed.
CVSS 4.0 Severity and Vector Strings:

NIST CVSS score
NIST: NVD
N/A
NVD assessment not yet provided.

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URL Source(s) Tag(s)
https://git.kernel.org/stable/c/518573988a2f14f517403db2ece5ddaefba21e94 kernel.org
https://git.kernel.org/stable/c/643d77fda08d06f863af35e80a7e517ea61d9629 kernel.org
https://git.kernel.org/stable/c/65bd0962992abd42e77a05e68c7b40e7c73726d1 kernel.org
https://git.kernel.org/stable/c/67fd41bbb0f51aa648a47f728b99e6f1fa2ccc34 kernel.org
https://git.kernel.org/stable/c/81565e51ccaf6fff8910e997ee22e16b5e1dabc3 kernel.org
https://git.kernel.org/stable/c/98b04dd0b4577894520493d96bc4623387767445 kernel.org
https://git.kernel.org/stable/c/99ef6cc791584495987dd11b14769b450dfa5820 kernel.org
https://git.kernel.org/stable/c/f4b44c7766dae2b8681f621941cabe9f14066d59 kernel.org

Weakness Enumeration

CWE-ID CWE Name Source

Change History

1 change records found show changes

Quick Info

CVE Dictionary Entry:
CVE-2022-50636
NVD Published Date:
12/08/2025
NVD Last Modified:
12/09/2025
Source:
kernel.org