CVE-2026-31473 Details
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.
A use-after-free vulnerability has been addressed in the Linux kernel's media request handling within the V4L2 subsystem. This issue arose because the MEDIA_REQUEST_IOC_REINIT operation could run simultaneously with the VIDIOC_REQBUFS(0) queue teardown process. Such concurrency could disrupt the cleanup of request objects, racing against the cancellation of video buffers, and leading to use-after-free conditions. The vulnerability affects the Linux kernel's stable group, specifically in the media request management for V4L2.
Users can upgrade to the latest version of the Linux kernel where this vulnerability has been fixed. Instructions for downloading the patched version are available on the official Linux kernel website.
Metrics
CVSS 4.0 Severity and Vector Strings:
No CVSS 4.0 data is available for this CVE.
CVSS 3.x Severity and Vector Strings:
No data available for CVSS Version 2.0 on this CVE.
No SSVC data is available for this CVE.
References to Advisories, Solutions, and Tools
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| URL | Source(s) | Tag(s) |
|---|---|---|
| https://git.kernel.org/stable/c/1a0d9083c24fbd5d22f7100f09d11e4d696a5f01 | kernel.org | Patch |
| https://git.kernel.org/stable/c/2c685e99efb3b3bd2b78699fba6b1cf321975db0 | kernel.org | Patch |
| https://git.kernel.org/stable/c/331242998a7ade5c2f65e14988901614629f3db5 | kernel.org | Patch |
| https://git.kernel.org/stable/c/585fd9a2063dacce8b2820f675ef23d5d17434c5 | kernel.org | Patch |
| https://git.kernel.org/stable/c/72b9e81e0203f03c40f3adb457f55bd4c8eb112d | kernel.org | Patch |
| https://git.kernel.org/stable/c/bef4f4a88b73e4cc550d25f665b8a9952af22773 | kernel.org | Patch |
| https://git.kernel.org/stable/c/cf2023e84f0888f96f4b65dc0804e7f3651969c1 | kernel.org | Patch |
| https://git.kernel.org/stable/c/d8549a453d5bdc0a71de66ad47a1106703406a56 | kernel.org | Patch |
Weakness Enumeration
| CWE-ID | CWE Name | Source |
|---|---|---|
| CWE-416 | Use After Free | [email protected] |
Affected Products
| Product | Versions |
|---|---|
| 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 4.20 - 7.0 rc1 7.0 rc2 7.0 rc3 7.0 rc4 7.0 rc5 7.0 rc6 7.0 rc7 |
CPE
Remediation
| |
Change History
4 change records found show changes
| Date | Action | Recorded By |
|---|---|---|
| Jun 17, 2026 | CVE Modified | kernel.org |
| Apr 27, 2026 | Initial Analysis | [email protected] |
| Apr 27, 2026 | CVE Modified | kernel.org |
| Apr 22, 2026 | New CVE Received | kernel.org |