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CVE-2026-93236

Unknown

Last modified

CVE-2026-93236 is a vulnerability of currently unknown severity. 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..

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.

Affected Software

Source: CNA advisory (CVE.org). NVD analysis pending.

VendorProductVersions
LinuxLinux>= 3e7f51bd96077acad6acd7b45668f65b44233c4e, < 276f28672bb6d5d5feca78db4219c7b5adf1be26; >= 3e7f51bd96077acad6acd7b45668f65b44233c4e, < c620906fb1b2ad75d408ea9d06040d66952d4a31; >= 3e7f51bd96077acad6acd7b45668f65b44233c4e, < 3839b6be2279fc4f558723f2c0fbfc9c42070958; >= 3e7f51bd96077acad6acd7b45668f65b44233c4e, < 680a89683197cdfe4e03e6fd7755454c647d39c1; >= 3e7f51bd96077acad6acd7b45668f65b44233c4e, < f2375a308640e401c142c5426d52c3d10e016d25; >= 3e7f51bd96077acad6acd7b45668f65b44233c4e, < 96dafbae77f50bfe2228bcfedcd8652c5e5f08e8; >= 3e7f51bd96077acad6acd7b45668f65b44233c4e, < d61ba609c3226af3c84268ba606ea06ee63e511b; >= 3e7f51bd96077acad6acd7b45668f65b44233c4e, < 20aa934ace6917262ff579a73ec018d06a7bad1c
LinuxLinux5.3

References

Timeline

Published
Last Modified
Status
Received

Frequently Asked Questions

What is CVE-2026-93236?
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.
How severe is CVE-2026-93236?
Severity scoring for CVE-2026-93236 is pending analysis.
How do I fix CVE-2026-93236?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

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Source: NVD / NIST