CVE-2022-50636: PCI: Fix pci_device_is_present() for VFs by checking PF
Noroxi assessment
Priority: Monitor (action score 0/100)
- The sources we track (CISA KEV, Exploit-DB, Metasploit, Nuclei, GitHub) show no public exploit code or exploitation in the wild.
- Probability of exploitation in the next 30 days: 0.22% (FIRST EPSS).
- Fixed version: Linux Linux 518573988a2f14f517403db2ece5ddaefba21e94, 643d77fda08d06f863af35e80a7e517ea61d9629, 65bd0962992abd42e77a05e68c7b40e7c73726d1.
Low priority for now. Upgrade to Linux Linux 518573988a2f14f517403db2ece5ddaefba21e94, 643d77fda08d06f863af35e80a7e517ea61d9629, 65bd0962992abd42e77a05e68c7b40e7c73726d1 or later.
Generated automatically from the record's data: CVSS (NVD and CNA), CISA KEV and SSVC, FIRST EPSS, exploit sources, fixed versions. How we calculate it
Primary sources: NVD · CVE.org · FIRST EPSS
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]
- Published
- Dec 9, 2025
- Updated
- Nov 10, 2026
- EPSS
- 0.2% · 13th percentile
- CWE
- —
Report tools
Action score
0
Low priority for now.
- CVSS
- 0 / 40 · —
- CISA KEV
- 0 / 30 · Not listed
- EPSS
- 0 / 30 · 0.2%
Get told when this record changes
- Not in KEV: no record of exploitation in the wild
- No public exploit code on record
- A fix has been released
If any of these changes, we'll tell you in the daily email digest.
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What does it mean in your environment?
The assessment above is generated automatically from the record's data; it doesn't know your environment. Our team verifies on your systems whether this vulnerability is actually exploitable and which mitigation is enough.
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—
Versions reported by the vendor
Affected version ranges reported by the assigning authority (Linux). Independent of NVD's CPE analysis and usually ahead of it.
Linux Linux
- 3.13affected
- 8496e85c20e7836b3dec97780e40f420a3ae2801 and later · before f4b44c7766dae2b8681f621941cabe9f14066d59affected · git
- 8496e85c20e7836b3dec97780e40f420a3ae2801 and later · before 643d77fda08d06f863af35e80a7e517ea61d9629affected · git
- 8496e85c20e7836b3dec97780e40f420a3ae2801 and later · before 65bd0962992abd42e77a05e68c7b40e7c73726d1affected · git
- 8496e85c20e7836b3dec97780e40f420a3ae2801 and later · before 99ef6cc791584495987dd11b14769b450dfa5820affected · git
- 8496e85c20e7836b3dec97780e40f420a3ae2801 and later · before 67fd41bbb0f51aa648a47f728b99e6f1fa2ccc34affected · git
- 8496e85c20e7836b3dec97780e40f420a3ae2801 and later · before 81565e51ccaf6fff8910e997ee22e16b5e1dabc3affected · git
- 8496e85c20e7836b3dec97780e40f420a3ae2801 and later · before 518573988a2f14f517403db2ece5ddaefba21e94affected · git
- 8496e85c20e7836b3dec97780e40f420a3ae2801 and later · before 98b04dd0b4577894520493d96bc4623387767445affected · git
- before 3.13not affected · semver
Package-level exposure
OSV and GitHub Advisory data: ecosystem, package and range. SBOM matching uses this table.
| Ecosystem | Package | Affected range | Fix |
|---|---|---|---|
| Debian:12 | linux | before 6.1.4-1 | 6.1.4-1 |
| SUSE:Linux Enterprise High Performance Computing 15 SP4-ESPOS | kernel-64kb | before 5.14.21-150400.24.194.1 | 5.14.21-150400.24.194.1 |
| SUSE:Linux Enterprise High Performance Computing 15 SP4-ESPOS | kernel-docs | before 5.14.21-150400.24.194.1 | 5.14.21-150400.24.194.1 |
| SUSE:Linux Enterprise High Performance Computing 15 SP4-ESPOS | kernel-obs-build | before 5.14.21-150400.24.194.1 | 5.14.21-150400.24.194.1 |
| SUSE:Linux Enterprise High Performance Computing 15 SP4-ESPOS | kernel-source | before 5.14.21-150400.24.194.1 | 5.14.21-150400.24.194.1 |
| SUSE:Linux Enterprise High Performance Computing 15 SP4-ESPOS | kernel-syms | before 5.14.21-150400.24.194.1 | 5.14.21-150400.24.194.1 |
| SUSE:Linux Enterprise High Performance Computing 15 SP5-ESPOS | kernel-64kb | before 5.14.21-150500.55.133.1 | 5.14.21-150500.55.133.1 |
| SUSE:Linux Enterprise High Performance Computing 15 SP5-ESPOS | kernel-docs | before 5.14.21-150500.55.133.1 | 5.14.21-150500.55.133.1 |
| SUSE:Linux Enterprise High Performance Computing 15 SP5-ESPOS | kernel-obs-build | before 5.14.21-150500.55.133.1 | 5.14.21-150500.55.133.1 |
| SUSE:Linux Enterprise High Performance Computing 15 SP5-ESPOS | kernel-syms | before 5.14.21-150500.55.133.1 | 5.14.21-150500.55.133.1 |
| SUSE:Linux Enterprise Live Patching 12 SP5 | kernel-default | before 4.12.14-122.290.1 | 4.12.14-122.290.1 |
| SUSE:Linux Enterprise Live Patching 12 SP5 | kgraft-patch-SLE12-SP5_Update_76 | before 1-8.7.1 | 1-8.7.1 |
| SUSE:Linux Enterprise Live Patching 15 SP4 | kernel-livepatch-SLE15-SP4_Update_48 | before 1-150400.9.7.1 | 1-150400.9.7.1 |
| SUSE:Linux Enterprise Live Patching 15 SP5 | kernel-livepatch-SLE15-SP5_Update_34 | before 1-150500.11.3.1 | 1-150500.11.3.1 |
| SUSE:Linux Enterprise Micro 5.3 | kernel-default | before 5.14.21-150400.24.194.1 | 5.14.21-150400.24.194.1 |
| SUSE:Linux Enterprise Micro 5.3 | kernel-default-base | before 5.14.21-150400.24.194.1.150400.24.98.3 | 5.14.21-150400.24.194.1.150400.24.98.3 |
| SUSE:Linux Enterprise Micro 5.3 | kernel-rt | before 5.14.21-150400.15.142.1 | 5.14.21-150400.15.142.1 |
| SUSE:Linux Enterprise Micro 5.3 | kernel-source-rt | before 5.14.21-150400.15.142.1 | 5.14.21-150400.15.142.1 |
| SUSE:Linux Enterprise Micro 5.5 | kernel-default | before 5.14.21-150500.55.133.1 | 5.14.21-150500.55.133.1 |
| SUSE:Linux Enterprise Micro 5.5 | kernel-default-base | before 5.14.21-150500.55.133.1.150500.6.65.1 | 5.14.21-150500.55.133.1.150500.6.65.1 |
| SUSE:Linux Enterprise Micro 5.5 | kernel-rt | before 5.14.21-150500.13.118.1 | 5.14.21-150500.13.118.1 |
| SUSE:Linux Enterprise Micro 5.5 | kernel-source | before 5.14.21-150500.55.133.1 | 5.14.21-150500.55.133.1 |
| SUSE:Linux Enterprise Micro 5.5 | kernel-source-rt | before 5.14.21-150500.13.118.1 | 5.14.21-150500.13.118.1 |
| SUSE:Linux Enterprise Server 12 SP5-LTSS | kernel-source | before 4.12.14-122.290.1 | 4.12.14-122.290.1 |
+3
Same product
linux: all recordsOther highest-scoring records for the same primary product.
- CVE-2026-74705udp: fix potential use-after-free in tunnel segmentation40Plan
- CVE-2026-74612veth: fix skb length accounting after XDP frag adjustment40Plan
- CVE-2026-74475vxlan: use neigh_ha_snapshot() in route_shortcircuit()40Plan
Published before and after this one in the same product
- ← EarlierCVE-2022-50634Dec 9, 2025 · power: supply: cw2015: Fix potential null-ptr-deref in cw_bat_probe()0Monitor
- ← EarlierCVE-2022-50635Dec 9, 2025 · powerpc/kprobes: Fix null pointer reference in arch_prepare_kprobe()0Monitor
- Later →CVE-2022-50637Dec 9, 2025 · cpufreq: qcom-hw: Fix memory leak in qcom_cpufreq_hw_read_lut()0Monitor
Remediation
Which version to upgrade to
Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.
| Product / package | Fixed version | Source |
|---|---|---|
| Linux Linux | 518573988a2f14f517403db2ece5ddaefba21e94 | Vendor (CNA) |
| Linux Linux | 643d77fda08d06f863af35e80a7e517ea61d9629 | Vendor (CNA) |
| Linux Linux | 65bd0962992abd42e77a05e68c7b40e7c73726d1 | Vendor (CNA) |
| Linux Linux | 67fd41bbb0f51aa648a47f728b99e6f1fa2ccc34 | Vendor (CNA) |
| Linux Linux | 81565e51ccaf6fff8910e997ee22e16b5e1dabc3 | Vendor (CNA) |
| Linux Linux | 98b04dd0b4577894520493d96bc4623387767445 | Vendor (CNA) |
| Linux Linux | 99ef6cc791584495987dd11b14769b450dfa5820 | Vendor (CNA) |
| Linux Linux | f4b44c7766dae2b8681f621941cabe9f14066d59 | Vendor (CNA) |
| debian:linux | 6.1.4-1 · Debian:12 | Package registry (OSV) |
| suse:kernel-64kb | 5.14.21-150500.55.133.1 · SUSE:Linux Enterprise High Performance Computing 15 SP5-ESPOS | Package registry (OSV) |
| suse:kernel-default | 4.12.14-122.290.1 · SUSE:Linux Enterprise Live Patching 12 SP5 | Package registry (OSV) |
| suse:kernel-default-base | 5.14.21-150500.55.133.1.150500.6.65.1 · SUSE:Linux Enterprise Micro 5.5 | Package registry (OSV) |
| suse:kernel-docs | 5.14.21-150500.55.133.1 · SUSE:Linux Enterprise High Performance Computing 15 SP5-ESPOS | Package registry (OSV) |
| suse:kernel-livepatch-SLE15-SP5_Update_34 | 1-150500.11.3.1 · SUSE:Linux Enterprise Live Patching 15 SP5 | Package registry (OSV) |
| suse:kernel-obs-build | 5.14.21-150500.55.133.1 · SUSE:Linux Enterprise High Performance Computing 15 SP5-ESPOS | Package registry (OSV) |
| suse:kernel-rt | 5.14.21-150500.13.118.1 · SUSE:Linux Enterprise Micro 5.5 | Package registry (OSV) |
| suse:kernel-source | 4.12.14-122.290.1 · SUSE:Linux Enterprise Server 12 SP5-LTSS | Package registry (OSV) |
| suse:kernel-source-rt | 5.14.21-150500.13.118.1 · SUSE:Linux Enterprise Micro 5.5 | Package registry (OSV) |
| suse:kernel-syms | 4.12.14-122.290.1 · SUSE:Linux Enterprise Server 12 SP5-LTSS | Package registry (OSV) |
| suse:kernel-zfcpdump | 5.14.21-150500.55.133.1 · SUSE:Linux Enterprise Server 15 SP5-LTSS | Package registry (OSV) |
| suse:kgraft-patch-SLE12-SP5_Update_76 | 1-8.7.1 · SUSE:Linux Enterprise Live Patching 12 SP5 | Package registry (OSV) |
Exploit status
No known public exploit
No public exploit has been observed yet. That doesn't mean you're safe, only that the bar is a little higher.
Research context
For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.
Timeline
From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.
No dated events beyond publication.
No history yet (it accumulates with the daily EPSS job).
Patch and commit links
Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.
No commit or PR link among the references.
Credits
All researchersFinders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.
No credits in the CNA record.
Variant candidates
Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.
No nightly-computed relations.
Chain candidates
An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.
—
Bug bounty scope
No known public program.
Source: bounty-targets-data (public HackerOne, Bugcrowd, Intigriti, YesWeHack listings).
Technical details
No CVSS vector for this record, so attack conditions can't be derived.
Weakness class (CWE)
—
Attack context
MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.
MITRE has no CAPEC/ATT&CK mapping for this CWE.
Change log
- Fix✗ → ✓
For records you follow, these changes also arrive as notifications. →
References
Show all references (7 more)Show less
- git.kernel.org/stable/c/643d77fda08d06f863af35e80a7e517ea61d9629
- git.kernel.org/stable/c/65bd0962992abd42e77a05e68c7b40e7c73726d1
- git.kernel.org/stable/c/67fd41bbb0f51aa648a47f728b99e6f1fa2ccc34
- git.kernel.org/stable/c/81565e51ccaf6fff8910e997ee22e16b5e1dabc3
- git.kernel.org/stable/c/98b04dd0b4577894520493d96bc4623387767445
- git.kernel.org/stable/c/99ef6cc791584495987dd11b14769b450dfa5820
- git.kernel.org/stable/c/f4b44c7766dae2b8681f621941cabe9f14066d59
Vendor advisories and official records. Exploit/PoC links are deliberately left out.