| 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-2024-26662: drm/amd/display: Fix 'panel_cntl' could be null in 'dcn21_set_backlight_level()' |
| |
| Description |
| =========== |
| |
| In the Linux kernel, the following vulnerability has been resolved: |
| |
| drm/amd/display: Fix 'panel_cntl' could be null in 'dcn21_set_backlight_level()' |
| |
| 'panel_cntl' structure used to control the display panel could be null, |
| dereferencing it could lead to a null pointer access. |
| |
| Fixes the below: |
| drivers/gpu/drm/amd/amdgpu/../display/dc/hwss/dcn21/dcn21_hwseq.c:269 dcn21_set_backlight_level() error: we previously assumed 'panel_cntl' could be null (see line 250) |
| |
| The Linux kernel CVE team has assigned CVE-2024-26662 to this issue. |
| |
| |
| Affected and fixed versions |
| =========================== |
| |
| Issue introduced in 5.9 with commit 474ac4a875ca6fea3fc5183d3ad22ef7523dca53 and fixed in 6.6.17 with commit 2e150ccea13129eb048679114808eb9770443e4d |
| Issue introduced in 5.9 with commit 474ac4a875ca6fea3fc5183d3ad22ef7523dca53 and fixed in 6.7.5 with commit 0c863cab0e9173f8b6c7bc328bee3b8625f131b5 |
| Issue introduced in 5.9 with commit 474ac4a875ca6fea3fc5183d3ad22ef7523dca53 and fixed in 6.8 with commit e96fddb32931d007db12b1fce9b5e8e4c080401b |
| |
| 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-2024-26662 |
| 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/amd/display/dc/hwss/dcn21/dcn21_hwseq.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/2e150ccea13129eb048679114808eb9770443e4d |
| https://git.kernel.org/stable/c/0c863cab0e9173f8b6c7bc328bee3b8625f131b5 |
| https://git.kernel.org/stable/c/e96fddb32931d007db12b1fce9b5e8e4c080401b |
