| 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-2025-21990: drm/amdgpu: NULL-check BO's backing store when determining GFX12 PTE flags |
| |
| Description |
| =========== |
| |
| In the Linux kernel, the following vulnerability has been resolved: |
| |
| drm/amdgpu: NULL-check BO's backing store when determining GFX12 PTE flags |
| |
| PRT BOs may not have any backing store, so bo->tbo.resource will be |
| NULL. Check for that before dereferencing. |
| |
| (cherry picked from commit 3e3fcd29b505cebed659311337ea03b7698767fc) |
| |
| The Linux kernel CVE team has assigned CVE-2025-21990 to this issue. |
| |
| |
| Affected and fixed versions |
| =========================== |
| |
| Issue introduced in 6.11 with commit 0cce5f285d9ae81c33993f3270fe77f5e74a69ab and fixed in 6.12.20 with commit 72235808eabea93055b459a63443bd9cd6b08aa4 |
| Issue introduced in 6.11 with commit 0cce5f285d9ae81c33993f3270fe77f5e74a69ab and fixed in 6.13.8 with commit af23e39b9e9280b1f6299b6f2fa090a1694240ad |
| Issue introduced in 6.11 with commit 0cce5f285d9ae81c33993f3270fe77f5e74a69ab and fixed in 6.14 with commit 6cc30748e17ea2a64051ceaf83a8372484e597f1 |
| |
| 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-2025-21990 |
| 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/amdgpu/gmc_v12_0.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/72235808eabea93055b459a63443bd9cd6b08aa4 |
| https://git.kernel.org/stable/c/af23e39b9e9280b1f6299b6f2fa090a1694240ad |
| https://git.kernel.org/stable/c/6cc30748e17ea2a64051ceaf83a8372484e597f1 |
