CVE-2026-93236
N/A
Summary
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
| Vendor | Product | Version Range | Status |
|---|---|---|---|
| Linux | Linux | 3e7f51bd96077acad6acd7b45668f65b44233c4e < 276f28672bb6d5d5feca78db4219c7b5adf1be26 | affected |
| Linux | Linux | 3e7f51bd96077acad6acd7b45668f65b44233c4e < c620906fb1b2ad75d408ea9d06040d66952d4a31 | affected |
| Linux | Linux | 3e7f51bd96077acad6acd7b45668f65b44233c4e < 3839b6be2279fc4f558723f2c0fbfc9c42070958 | affected |
| Linux | Linux | 3e7f51bd96077acad6acd7b45668f65b44233c4e < 680a89683197cdfe4e03e6fd7755454c647d39c1 | affected |
| Linux | Linux | 3e7f51bd96077acad6acd7b45668f65b44233c4e < f2375a308640e401c142c5426d52c3d10e016d25 | affected |
| Linux | Linux | 3e7f51bd96077acad6acd7b45668f65b44233c4e < 96dafbae77f50bfe2228bcfedcd8652c5e5f08e8 | affected |
| Linux | Linux | 3e7f51bd96077acad6acd7b45668f65b44233c4e < d61ba609c3226af3c84268ba606ea06ee63e511b | affected |
| Linux | Linux | 3e7f51bd96077acad6acd7b45668f65b44233c4e < 20aa934ace6917262ff579a73ec018d06a7bad1c | affected |
| Linux | Linux | 5.3 | affected |
| Linux | Linux | 0 < 5.3 | unaffected |
| Linux | Linux | 5.10.270 <= 5.10.* | unaffected |
| Linux | Linux | 5.15.221 <= 5.15.* | unaffected |
| Linux | Linux | 6.1.188 <= 6.1.* | unaffected |
| Linux | Linux | 6.6.157 <= 6.6.* | unaffected |
| Linux | Linux | 6.12.110 <= 6.12.* | unaffected |
| Linux | Linux | 6.18.51 <= 6.18.* | unaffected |
| Linux | Linux | 7.2.5 <= 7.2.* | unaffected |
| Linux | Linux | 7.3-rc1 <= * | unaffected |
Weaknesses
References
- https://git.kernel.org/stable/c/276f28672bb6d5d5feca78db4219c7b5adf1be26
- https://git.kernel.org/stable/c/c620906fb1b2ad75d408ea9d06040d66952d4a31
- https://git.kernel.org/stable/c/3839b6be2279fc4f558723f2c0fbfc9c42070958
- https://git.kernel.org/stable/c/680a89683197cdfe4e03e6fd7755454c647d39c1
- https://git.kernel.org/stable/c/f2375a308640e401c142c5426d52c3d10e016d25
- https://git.kernel.org/stable/c/96dafbae77f50bfe2228bcfedcd8652c5e5f08e8
- https://git.kernel.org/stable/c/d61ba609c3226af3c84268ba606ea06ee63e511b
- https://git.kernel.org/stable/c/20aa934ace6917262ff579a73ec018d06a7bad1c
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