Use of Externally-Controlled Format String in umlaeute/v4l2loopback
Priority LOW 27CWE-134Published · Updated
Key facts
- Attack vector
- Local
- Privileges required
- High
- User interaction
- None
- Attack complexity
- Low
- Impact type
- —
- Confidentiality · integrity · availability
- High · None · High
- Fix status
- Fixed
Attack profile from CVSS 3.1 · NVD. Fix status from CNA.
Summary
Depending on the way the format strings in the card label are crafted it's possible to leak kernel stack memory. There is also the possibility for DoS due to the v4l2loopback kernel module crashing when providing the card label on request (reproduce e.g. with many %s modifiers in a row).
Why it matters now
EPSS 0.00334 26th percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by NVD
Fix Fixed umlaeute/v4l2loopback (umlaeute): 0.12.6
SSVC decision points
Not available: CISA has not published SSVC decision points for this record.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| umlaeute | umlaeute/v4l2loopback | before 0.12.6 | 0.12.6 | Patch available | CNA |
- umlaeute/v4l2loopback Vendorumlaeute Affected before 0.12.6 Fixed in 0.12.6 Patch available CNA
CPE configurations NVD · 1
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:o:v4l2loopback_project:v4l2loopback:*:*:*:*:*:*:*:* | before 0.12.6 | Vulnerable | V4l2loopback Project |
- cpe:2.3:o:v4l2loopback_project:v4l2loopback:*:*:*:*:*:*:*:* Versions before 0.12.6 Vulnerable ·V4l2loopback Project
Remediation
- Fix · CNA umlaeute/v4l2loopback (umlaeute) Fixed in 0.12.6
Timeline
- 2026-10-02 Threatist record created from CVE-2022-2652
- 2026-10-03 Alias added: GHSA-grx9-955g-vjfg
References
Sources
- CVE-2022-2652 · CVE Program
- CVE-2022-2652 · NVD
- FIRST EPSS
- GHSA-grx9-955g-vjfg · GitHub Advisory Database · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences