| 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-2023-52649: drm/vkms: Avoid reading beyond LUT array |
| |
| Description |
| =========== |
| |
| In the Linux kernel, the following vulnerability has been resolved: |
| |
| drm/vkms: Avoid reading beyond LUT array |
| |
| When the floor LUT index (drm_fixp2int(lut_index) is the last |
| index of the array the ceil LUT index will point to an entry |
| beyond the array. Make sure we guard against it and use the |
| value of the floor LUT index. |
| |
| v3: |
| - Drop bits from commit description that didn't contribute |
| anything of value |
| |
| The Linux kernel CVE team has assigned CVE-2023-52649 to this issue. |
| |
| |
| Affected and fixed versions |
| =========================== |
| |
| Issue introduced in 6.6 with commit db1f254f2cfaf0510ae34fa2311a8d749e95179a and fixed in 6.6.23 with commit 9556c167673057d48ce4a0da675026fe046654c1 |
| Issue introduced in 6.6 with commit db1f254f2cfaf0510ae34fa2311a8d749e95179a and fixed in 6.7.11 with commit 046c1184ce60b0a37d48134f17ddbc1f32ce02bd |
| Issue introduced in 6.6 with commit db1f254f2cfaf0510ae34fa2311a8d749e95179a and fixed in 6.8.2 with commit 92800aaeff51b8358d1e0a7eb74daf8aa2d7ce9d |
| Issue introduced in 6.6 with commit db1f254f2cfaf0510ae34fa2311a8d749e95179a and fixed in 6.9 with commit 2fee84030d12d9fddfa874e4562d71761a129277 |
| |
| 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-2023-52649 |
| 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/gpu/drm/vkms/vkms_composer.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/9556c167673057d48ce4a0da675026fe046654c1 |
| https://git.kernel.org/stable/c/046c1184ce60b0a37d48134f17ddbc1f32ce02bd |
| https://git.kernel.org/stable/c/92800aaeff51b8358d1e0a7eb74daf8aa2d7ce9d |
| https://git.kernel.org/stable/c/2fee84030d12d9fddfa874e4562d71761a129277 |
