| 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-2024-49905: drm/amd/display: Add null check for 'afb' in amdgpu_dm_plane_handle_cursor_update (v2) |
| |
| Description |
| =========== |
| |
| In the Linux kernel, the following vulnerability has been resolved: |
| |
| drm/amd/display: Add null check for 'afb' in amdgpu_dm_plane_handle_cursor_update (v2) |
| |
| This commit adds a null check for the 'afb' variable in the |
| amdgpu_dm_plane_handle_cursor_update function. Previously, 'afb' was |
| assumed to be null, but was used later in the code without a null check. |
| This could potentially lead to a null pointer dereference. |
| |
| Changes since v1: |
| - Moved the null check for 'afb' to the line where 'afb' is used. (Alex) |
| |
| Fixes the below: |
| drivers/gpu/drm/amd/amdgpu/../display/amdgpu_dm/amdgpu_dm_plane.c:1298 amdgpu_dm_plane_handle_cursor_update() error: we previously assumed 'afb' could be null (see line 1252) |
| |
| The Linux kernel CVE team has assigned CVE-2024-49905 to this issue. |
| |
| |
| Affected and fixed versions |
| =========================== |
| |
| Fixed in 6.1.113 with commit bd0e24e5e608ccb9fdda300bb974496d6d8cf57d |
| Fixed in 6.6.55 with commit 75839e2365b666ff4e1b9047e442cab138eac4f6 |
| Fixed in 6.10.14 with commit 9132882eaae4d21d2fc5843b3308379a481ebdf0 |
| Fixed in 6.11.3 with commit e4e26cbe34d7c1c1db5fb7b3101573c29866439f |
| Fixed in 6.12 with commit cd9e9e0852d501f169aa3bb34e4b413d2eb48c37 |
| |
| 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-2024-49905 |
| 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/amdgpu_dm/amdgpu_dm_plane.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/bd0e24e5e608ccb9fdda300bb974496d6d8cf57d |
| https://git.kernel.org/stable/c/75839e2365b666ff4e1b9047e442cab138eac4f6 |
| https://git.kernel.org/stable/c/9132882eaae4d21d2fc5843b3308379a481ebdf0 |
| https://git.kernel.org/stable/c/e4e26cbe34d7c1c1db5fb7b3101573c29866439f |
| https://git.kernel.org/stable/c/cd9e9e0852d501f169aa3bb34e4b413d2eb48c37 |
