| 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-2025-21842: amdkfd: properly free gang_ctx_bo when failed to init user queue |
| |
| Description |
| =========== |
| |
| In the Linux kernel, the following vulnerability has been resolved: |
| |
| amdkfd: properly free gang_ctx_bo when failed to init user queue |
| |
| The destructor of a gtt bo is declared as |
| void amdgpu_amdkfd_free_gtt_mem(struct amdgpu_device *adev, void **mem_obj); |
| Which takes void** as the second parameter. |
| |
| GCC allows passing void* to the function because void* can be implicitly |
| casted to any other types, so it can pass compiling. |
| |
| However, passing this void* parameter into the function's |
| execution process(which expects void** and dereferencing void**) |
| will result in errors. |
| |
| The Linux kernel CVE team has assigned CVE-2025-21842 to this issue. |
| |
| |
| Affected and fixed versions |
| =========================== |
| |
| Issue introduced in 6.12 with commit fb91065851cd5f2735348c5f3eddeeca3d7c2973 and fixed in 6.12.16 with commit ae5ab1c1ae504f622cc1ff48830a9ed48428146d |
| Issue introduced in 6.12 with commit fb91065851cd5f2735348c5f3eddeeca3d7c2973 and fixed in 6.13.4 with commit 091a68c58c1bbd2ab7d05d1b32c1306394ec691d |
| Issue introduced in 6.12 with commit fb91065851cd5f2735348c5f3eddeeca3d7c2973 and fixed in 6.14 with commit a33f7f9660705fb2ecf3467b2c48965564f392ce |
| |
| 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-2025-21842 |
| 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/amdkfd/kfd_process_queue_manager.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/ae5ab1c1ae504f622cc1ff48830a9ed48428146d |
| https://git.kernel.org/stable/c/091a68c58c1bbd2ab7d05d1b32c1306394ec691d |
| https://git.kernel.org/stable/c/a33f7f9660705fb2ecf3467b2c48965564f392ce |
