Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: media: meson: vdec: fix NULL pointer deref in vdec_try_fmt_common When VIDIOC_TRY_FMT is called with an unsupported pixel format on the OUTPUT queue, vdec_try_fmt_common() falls back to V4L2_PIX_FMT_MPEG2. However, if a distro has locally patched MPEG2 support out (as it has been broken for some time) the platform format table does not contain MPEG2 so find_format() returns NULL and the subsequent dereference of fmt_out->max_width triggers a NULL pointer dereference. Fix this by falling back to the first format in the platform's format array instead of hardcoding V4L2_PIX_FMT_MPEG2. This is always valid since every platform defines at least one format.
References
- https://git.kernel.org/stable/c/20aa934ace6917262ff579a73ec018d06a7bad1c
- https://git.kernel.org/stable/c/276f28672bb6d5d5feca78db4219c7b5adf1be26
- https://git.kernel.org/stable/c/3839b6be2279fc4f558723f2c0fbfc9c42070958
- https://git.kernel.org/stable/c/680a89683197cdfe4e03e6fd7755454c647d39c1
- https://git.kernel.org/stable/c/96dafbae77f50bfe2228bcfedcd8652c5e5f08e8
- https://git.kernel.org/stable/c/c620906fb1b2ad75d408ea9d06040d66952d4a31
- https://git.kernel.org/stable/c/d61ba609c3226af3c84268ba606ea06ee63e511b
- https://git.kernel.org/stable/c/f2375a308640e401c142c5426d52c3d10e016d25
FAQ
What is CVE-2026-93236?
CVE-2026-93236 is a documented vulnerability. In the Linux kernel, the following vulnerability has been resolved: media: meson: vdec: fix NULL pointer deref in vdec_try_fmt_common When VIDIOC_TRY_FMT is called with an unsupported pixel format o...
How severe is CVE-2026-93236?
CVSS scoring is not yet available for CVE-2026-93236. Check NVD for updates.
Is there a patch for CVE-2026-93236?
Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.