CVE-2026-31473

Advisory lineage Upstream: 0 Downstream: 5
Analyzed
Published: 22 Apr 2026, 13:54
Last modified:11 May 2026, 22:09

Vulnerability Summary

Overall Risk (default)
medium
31/100
CVSS Score
7.8 HIGH
v3.1 (cve.org)
EPSS Score
0.13% LOW
0% probability +0.11%
KEV
Not listed
Ransomware
No reports
Public exploits
None found
Dark Web
Not detected

Timeline

22 Apr 2026, 13:54
Published
Vulnerability first disclosed
11 May 2026, 22:09
Last Modified
Vulnerability information updated

Description

In the Linux kernel, the following vulnerability has been resolved: media: mc, v4l2: serialize REINIT and REQBUFS with req_queue_mutex MEDIA_REQUEST_IOC_REINIT can run concurrently with VIDIOC_REQBUFS(0) queue teardown paths. This can race request object cleanup against vb2 queue cancellation and lead to use-after-free reports. We already serialize request queueing against STREAMON/OFF with req_queue_mutex. Extend that serialization to REQBUFS, and also take the same mutex in media_request_ioctl_reinit() so REINIT is in the same exclusion domain. This keeps request cleanup and queue cancellation from running in parallel for request-capable devices.

CVSS Metrics

  • v3.1•HIGH•Score: 7.8CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

EPSS Trends

Current EPSS score: 0.13%• Percentile: 3%

Techniques & Countermeasures

  • CWE-416•Use After Free

    The product reuses or references memory after it has been freed. At some point afterward, the memory may be allocated again and saved in another pointer, while the original pointer references a location somewhere within the new allocation. Any operations using the original pointer are no longer valid because the memory "belongs" to the code that operates on the new pointer.

Affected Systems

  • linux•linux

    ≥ 6093d3002eabd7c2913d97f1d1f4ce34b072acf9, < 331242998a7ade5c2f65e14988901614629f3db5 | ≥ 6093d3002eabd7c2913d97f1d1f4ce34b072acf9, < 2c685e99efb3b3bd2b78699fba6b1cf321975db0 | ≥ 6093d3002eabd7c2913d97f1d1f4ce34b072acf9, < 585fd9a2063dacce8b2820f675ef23d5d17434c5 | ≥ 6093d3002eabd7c2913d97f1d1f4ce34b072acf9, < 1a0d9083c24fbd5d22f7100f09d11e4d696a5f01 | ≥ 6093d3002eabd7c2913d97f1d1f4ce34b072acf9, < d8549a453d5bdc0a71de66ad47a1106703406a56 | ≥ 6093d3002eabd7c2913d97f1d1f4ce34b072acf9, < 72b9e81e0203f03c40f3adb457f55bd4c8eb112d | ≥ 6093d3002eabd7c2913d97f1d1f4ce34b072acf9, < cf2023e84f0888f96f4b65dc0804e7f3651969c1 | ≥ 6093d3002eabd7c2913d97f1d1f4ce34b072acf9, < bef4f4a88b73e4cc550d25f665b8a9952af22773 | 4.20

  • linux•linux_kernel

    ≥ 4.20.1, < 5.10.253 | ≥ 5.11, < 5.15.203 | ≥ 5.16, < 6.1.168 | ≥ 6.2, < 6.6.131 | ≥ 6.7, < 6.12.80 | ≥ 6.13, < 6.18.21 | ≥ 6.19, < 6.19.11 | 4.2.0 | 7.0:rc1 | 7.0:rc2 | 7.0:rc3 | 7.0:rc4 | 7.0:rc5 | 7.0:rc6 | 7.0:rc7

References (8)