vfio/pci: Release the VGA arbiter client on register_device() failure
In the Linux kernel, the following vulnerability has been resolved: vfio/pci: Release the VGA arbiter client on register_device() failure The re-order in the Fixes commit below displaced vfio_pci_vga_init() as the last failure point of what is now vfio_pci_core_register_device() without introducing an unwind for the VGA arbiter registration. In current kernels this is mostly benign because vfio_pci_set_decode() only uses pci_dev state, but the original failure path could leave a callback with a freed vdev cookie. The stale registration also becomes unsafe again once the callback follows drvdata to the vfio device. Add the required VGA unwind callout.
- Published
- Jul 25, 2026
- Updated
- Aug 17, 2026
- EPSS
- 0.2% · 6th percentile
- CWE
- —
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Report tools
Action score
35
Monitor
Low priority for now.
- CVSS
- 35 / 40 · 8.8 / 10
- CISA KEV
- 0 / 30 · Not listed
- EPSS
- 0 / 30 · 0.2%
CNA vs NVD score
- NVD
- —
- CNA · Linux
- 8.8
- NVD has not scored this yet; the score shown is the CNA’s.
The score given by the assigning authority versus NVD’s independent score. A gap means the severity is contested.
Affected systems
—
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
- d62dccb417cf972c978bf3c68a7d5e846bcf953e, 6694b8daffac5a8661071f085608afc78f7acd08, 5.13affected
- 87856f9af04eaacf9848710625a4ffee1d020fa9 and later · before 0f2a35a0c7ea7da347b814750eaa78adf3582381affected · git
- 4aeec3984ddc853f7c65903bde472ffdef738bae and later · before 8d65decde9afd2bd78bcfffdc0df73b82a0b5509affected · git
- 4aeec3984ddc853f7c65903bde472ffdef738bae and later · before ef4c38d30b3744e89eb5048218904bb629ea8d47affected · git
- 4aeec3984ddc853f7c65903bde472ffdef738bae and later · before 9e0a3f642e607848669235f5069f35640abbfc88affected · git
- 4aeec3984ddc853f7c65903bde472ffdef738bae and later · before 42d758a09d2c46c42357ecde9a5492f015bde2e5affected · git
- 4aeec3984ddc853f7c65903bde472ffdef738bae and later · before 52adb2dff7ce3d8430e2bdc5988b618a430def85affected · git
- 4aeec3984ddc853f7c65903bde472ffdef738bae and later · before 278a5659c391fe5afe5f9ce1bad1fd24e90144f1affected · git
- 4aeec3984ddc853f7c65903bde472ffdef738bae and later · before daedde7f024ecf88bc8e832ed40cf2c795f0796aaffected · git
- 5.10.37 and later · before 5.10.261affected · 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 6.1.180-1 | 6.1.180-1 |
| Debian:12 | linux-6.12 | before 6.12.100-1~deb12u1 | 6.12.100-1~deb12u1 |
| Debian:13 | linux | before 6.12.96-1 | 6.12.96-1 |
| Debian:14 | linux | before 7.1.4-1 | 7.1.4-1 |
Same product
linux: all recordsOther highest-scoring records for the same primary product.
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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 | 0f2a35a0c7ea7da347b814750eaa78adf3582381 | Vendor (CNA) |
| Linux Linux | 278a5659c391fe5afe5f9ce1bad1fd24e90144f1 | Vendor (CNA) |
| Linux Linux | 42d758a09d2c46c42357ecde9a5492f015bde2e5 | Vendor (CNA) |
| Linux Linux | 5.10.261 | Vendor (CNA) |
| Linux Linux | 5.12 | Vendor (CNA) |
| Linux Linux | 5.13 | Vendor (CNA) |
| Linux Linux | 52adb2dff7ce3d8430e2bdc5988b618a430def85 | Vendor (CNA) |
| Linux Linux | 8d65decde9afd2bd78bcfffdc0df73b82a0b5509 | Vendor (CNA) |
| Linux Linux | 9e0a3f642e607848669235f5069f35640abbfc88 | Vendor (CNA) |
| Linux Linux | daedde7f024ecf88bc8e832ed40cf2c795f0796a | Vendor (CNA) |
| Linux Linux | ef4c38d30b3744e89eb5048218904bb629ea8d47 | Vendor (CNA) |
| azl3 kernel 6.6.144.1-1 on Azure Linux 3.0 | 6.6.145.2-1 · CBL-Mariner Releases | Microsoft (MSRC) |
| debian:linux | 6.1.180-1 · Debian:12 | Package registry (OSV) |
| debian:linux-6.12 | 6.12.100-1~deb12u1 · Debian:12 | 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.
FIRST EPSS daily score; only changes of 0.01 or more are recorded (step chart).
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
Attack conditions
- Someone with local access to the system can trigger it.
- A low-privileged account is enough.
- No user action is required.
- No special conditions are required; it is repeatable.
If successful
- Confidentiality
- high · data can be read
- Integrity
- high · data or configuration can be modified
- Availability
- high · the service can be disrupted
Impact can extend beyond the vulnerable component (scope changes).
- Attack vector
- Local
- Attack complexity
- Low
- Privileges required
- Low
- User interaction
- None
- Scope
- Changed
- Confidentiality impact
- High
- Integrity impact
- High
- Availability impact
- High
Weakness class (CWE)
—
CVSS vector
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
nvd-secondary
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.
Noroxi analysis
No Noroxi analysis for this record yet
We don't hand-write analysis for all 385,000+ vulnerabilities; that wouldn't be honest. For notable, high-impact vulnerabilities our team writes the mechanism, detection and remediation steps.
We use this product, ask for helpChange log
- Fix✗ → ✓
For records you follow, these changes also arrive as notifications. →
References
- git.kernel.org/stable/c/0f2a35a0c7ea7da347b814750eaa78adf3582381
- git.kernel.org/stable/c/278a5659c391fe5afe5f9ce1bad1fd24e90144f1
- git.kernel.org/stable/c/42d758a09d2c46c42357ecde9a5492f015bde2e5
- git.kernel.org/stable/c/52adb2dff7ce3d8430e2bdc5988b618a430def85
- git.kernel.org/stable/c/8d65decde9afd2bd78bcfffdc0df73b82a0b5509
- git.kernel.org/stable/c/9e0a3f642e607848669235f5069f35640abbfc88
- git.kernel.org/stable/c/daedde7f024ecf88bc8e832ed40cf2c795f0796a
- git.kernel.org/stable/c/ef4c38d30b3744e89eb5048218904bb629ea8d47
Vendor advisories and official records. Exploit/PoC links are deliberately left out.