CVE-2025-39714

low-risk
Published 2025-09-05

In the Linux kernel, the following vulnerability has been resolved: media: usbtv: Lock resolution while streaming When an program is streaming (ffplay) and another program (qv4l2) changes the TV standard from NTSC to PAL, the kernel crashes due to trying to copy to unmapped memory. Changing from NTSC to PAL increases the resolution in the usbtv struct, but the video plane buffer isn't adjusted, so it overflows. [hverkuil: call vb2_is_busy instead of vb2_is_streaming]

Do I need to act?

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0.02% chance of exploitation
EPSS score — low exploit probability
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Not on CISA KEV list
No confirmed active exploitation reported to CISA
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Patch status unknown
Check vendor advisories for fix availability and mitigation guidance
5
CVSS 5.5/10 Medium
LOCAL / LOW complexity

Affected Products (2)

Affected Vendors

Debian Linux

References (10)

Patch https://git.kernel.org/stable/c/3d83d0b5ae5045a7a246ed116b5f6c688a12f9e9
Patch https://git.kernel.org/stable/c/5427dda195d6baf23028196fd55a0c90f66ffa61
Patch https://git.kernel.org/stable/c/7e40e0bb778907b2441bff68d73c3eb6b6cd319f
Patch https://git.kernel.org/stable/c/9f886d21e235c4bd038cb20f6696084304197ab3
Patch https://git.kernel.org/stable/c/c35e7c7a004ef379a1ae7c7486d4829419acad1d
Patch https://git.kernel.org/stable/c/c3d75524e10021aa5c223d94da4996640aed46c0
Patch https://git.kernel.org/stable/c/ee7bade8b9244834229b12b6e1e724939bedd484
Patch https://git.kernel.org/stable/c/ef9b3c22405192afaa279077ddd45a51db90b83d
Mailing List https://lists.debian.org/debian-lts-announce/2025/10/msg00007.html
Mailing List https://lists.debian.org/debian-lts-announce/2025/10/msg00008.html
25
/ 100
low-risk
Severity 18/34 · Moderate
Exploitability 0/34 · Minimal
Exposure 7/34 · Low