| From bippy-7c5fe7eed585 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-2025-21941: drm/amd/display: Fix null check for pipe_ctx->plane_state in resource_build_scaling_params |
| |
| Description |
| =========== |
| |
| In the Linux kernel, the following vulnerability has been resolved: |
| |
| drm/amd/display: Fix null check for pipe_ctx->plane_state in resource_build_scaling_params |
| |
| Null pointer dereference issue could occur when pipe_ctx->plane_state |
| is null. The fix adds a check to ensure 'pipe_ctx->plane_state' is not |
| null before accessing. This prevents a null pointer dereference. |
| |
| Found by code review. |
| |
| (cherry picked from commit 63e6a77ccf239337baa9b1e7787cde9fa0462092) |
| |
| The Linux kernel CVE team has assigned CVE-2025-21941 to this issue. |
| |
| |
| Affected and fixed versions |
| =========================== |
| |
| Issue introduced in 4.15 with commit 3be5262e353b8ab97c528bfc7d0dd3c820e4ba27 and fixed in 5.10.236 with commit 265422915416468ba91bffa56addbff45e18342a |
| Issue introduced in 4.15 with commit 3be5262e353b8ab97c528bfc7d0dd3c820e4ba27 and fixed in 5.15.180 with commit f435192e00bc4d5d4134356b93212670ec47fa8d |
| Issue introduced in 4.15 with commit 3be5262e353b8ab97c528bfc7d0dd3c820e4ba27 and fixed in 6.1.131 with commit c1e54752dc12e90305eb0475ca908f42f5b369ca |
| Issue introduced in 4.15 with commit 3be5262e353b8ab97c528bfc7d0dd3c820e4ba27 and fixed in 6.6.83 with commit 3b3c2be58d5275aa59d8b4810a59f173f2f5bac1 |
| Issue introduced in 4.15 with commit 3be5262e353b8ab97c528bfc7d0dd3c820e4ba27 and fixed in 6.12.19 with commit e0345c3478f185ca840daac7f08a1fcd4ebec3e9 |
| Issue introduced in 4.15 with commit 3be5262e353b8ab97c528bfc7d0dd3c820e4ba27 and fixed in 6.13.7 with commit 3748fad09d89e9a5290e1738fd6872a79f794743 |
| Issue introduced in 4.15 with commit 3be5262e353b8ab97c528bfc7d0dd3c820e4ba27 and fixed in 6.14 with commit 374c9faac5a763a05bc3f68ad9f73dab3c6aec90 |
| |
| 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-2025-21941 |
| 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/core/dc_resource.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/265422915416468ba91bffa56addbff45e18342a |
| https://git.kernel.org/stable/c/f435192e00bc4d5d4134356b93212670ec47fa8d |
| https://git.kernel.org/stable/c/c1e54752dc12e90305eb0475ca908f42f5b369ca |
| https://git.kernel.org/stable/c/3b3c2be58d5275aa59d8b4810a59f173f2f5bac1 |
| https://git.kernel.org/stable/c/e0345c3478f185ca840daac7f08a1fcd4ebec3e9 |
| https://git.kernel.org/stable/c/3748fad09d89e9a5290e1738fd6872a79f794743 |
| https://git.kernel.org/stable/c/374c9faac5a763a05bc3f68ad9f73dab3c6aec90 |
