| From bippy-5f407fcff5a0 Mon Sep 17 00:00:00 2001 |
| From: Greg Kroah-Hartman <gregkh@linuxfoundation.org> |
| To: <linux-cve-announce@vger.kernel.org> |
| Reply-to: <cve@kernel.org>, <linux-kernel@vger.kernel.org> |
| Subject: CVE-2023-52888: media: mediatek: vcodec: Only free buffer VA that is not NULL |
| |
| Description |
| =========== |
| |
| In the Linux kernel, the following vulnerability has been resolved: |
| |
| media: mediatek: vcodec: Only free buffer VA that is not NULL |
| |
| In the MediaTek vcodec driver, while mtk_vcodec_mem_free() is mostly |
| called only when the buffer to free exists, there are some instances |
| that didn't do the check and triggered warnings in practice. |
| |
| We believe those checks were forgotten unintentionally. Add the checks |
| back to fix the warnings. |
| |
| The Linux kernel CVE team has assigned CVE-2023-52888 to this issue. |
| |
| |
| Affected and fixed versions |
| =========================== |
| |
| Issue introduced in 4.10 with commit 590577a4e5257ac3ed72999a94666ad6ba8f24bc and fixed in 6.6.39 with commit 5c217253c76c94f76d1df31d0bbdcb88dc07be91 |
| Issue introduced in 4.10 with commit 590577a4e5257ac3ed72999a94666ad6ba8f24bc and fixed in 6.9.9 with commit 303d01082edaf817ee2df53a40dca9da637a2c04 |
| Issue introduced in 4.10 with commit 590577a4e5257ac3ed72999a94666ad6ba8f24bc and fixed in 6.10 with commit eb005c801ec70ff4307727bd3bd6e8280169ef32 |
| |
| Please see https://www.kernel.org for a full list of currently supported |
| kernel versions by the kernel community. |
| |
| Unaffected versions might change over time as fixes are backported to |
| older supported kernel versions. The official CVE entry at |
| https://cve.org/CVERecord/?id=CVE-2023-52888 |
| will be updated if fixes are backported, please check that for the most |
| up to date information about this issue. |
| |
| |
| Affected files |
| ============== |
| |
| The file(s) affected by this issue are: |
| drivers/media/platform/mediatek/vcodec/decoder/vdec/vdec_av1_req_lat_if.c |
| drivers/media/platform/mediatek/vcodec/encoder/venc/venc_h264_if.c |
| |
| |
| Mitigation |
| ========== |
| |
| The Linux kernel CVE team recommends that you update to the latest |
| stable kernel version for this, and many other bugfixes. Individual |
| changes are never tested alone, but rather are part of a larger kernel |
| release. Cherry-picking individual commits is not recommended or |
| supported by the Linux kernel community at all. If however, updating to |
| the latest release is impossible, the individual changes to resolve this |
| issue can be found at these commits: |
| https://git.kernel.org/stable/c/5c217253c76c94f76d1df31d0bbdcb88dc07be91 |
| https://git.kernel.org/stable/c/303d01082edaf817ee2df53a40dca9da637a2c04 |
| https://git.kernel.org/stable/c/eb005c801ec70ff4307727bd3bd6e8280169ef32 |
