Description (CNA)
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 (CNA)
| Vendor / product | Versions |
|---|---|
| Linux / Linux | affected 3e7f51bd96077acad6acd7b45668f65b44233c4e before 276f28672bb6d5d5feca78db4219c7b5adf1be26; affected 3e7f51bd96077acad6acd7b45668f65b44233c4e before c620906fb1b2ad75d408ea9d06040d66952d4a31; affected 3e7f51bd96077acad6acd7b45668f65b44233c4e before 3839b6be2279fc4f558723f2c0fbfc9c42070958; affected 3e7f51bd96077acad6acd7b45668f65b44233c4e before 680a89683197cdfe4e03e6fd7755454c647d39c1; affected 3e7f51bd96077acad6acd7b45668f65b44233c4e before f2375a308640e401c142c5426d52c3d10e016d25; affected 3e7f51bd96077acad6acd7b45668f65b44233c4e before 96dafbae77f50bfe2228bcfedcd8652c5e5f08e8; affected 3e7f51bd96077acad6acd7b45668f65b44233c4e before d61ba609c3226af3c84268ba606ea06ee63e511b; affected 3e7f51bd96077acad6acd7b45668f65b44233c4e before 20aa934ace6917262ff579a73ec018d06a7bad1c |
| Linux / Linux | affected 5.3; unaffected 0 before 5.3; unaffected 5.10.270 through 5.10.*; unaffected 5.15.221 through 5.15.*; unaffected 6.1.188 through 6.1.*; unaffected 6.6.157 through 6.6.*; unaffected 6.12.110 through 6.12.*; unaffected 6.18.51 through 6.18.*; unaffected 7.2.5 through 7.2.*; unaffected 7.3 through * |
CWE
No CWE identifiers supplied.
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