| From bippy-1.2.0 Mon Sep 17 00:00:00 2001 |
| From: Greg Kroah-Hartman <gregkh@kernel.org> |
| To: <linux-cve-announce@vger.kernel.org> |
| Reply-to: <cve@kernel.org>, <linux-kernel@vger.kernel.org> |
| Subject: CVE-2025-37763: drm/imagination: take paired job reference |
| |
| Description |
| =========== |
| |
| In the Linux kernel, the following vulnerability has been resolved: |
| |
| drm/imagination: take paired job reference |
| |
| For paired jobs, have the fragment job take a reference on the |
| geometry job, so that the geometry job cannot be freed until |
| the fragment job has finished with it. |
| |
| The geometry job structure is accessed when the fragment job is being |
| prepared by the GPU scheduler. Taking the reference prevents the |
| geometry job being freed until the fragment job no longer requires it. |
| |
| Fixes a use after free bug detected by KASAN: |
| |
| [ 124.256386] BUG: KASAN: slab-use-after-free in pvr_queue_prepare_job+0x108/0x868 [powervr] |
| [ 124.264893] Read of size 1 at addr ffff0000084cb960 by task kworker/u16:4/63 |
| |
| The Linux kernel CVE team has assigned CVE-2025-37763 to this issue. |
| |
| |
| Affected and fixed versions |
| =========================== |
| |
| Issue introduced in 6.8 with commit eaf01ee5ba28b97f96a3d3eec4c5fbfb37ee4cde and fixed in 6.12.25 with commit c90b95e12eb88d23740e5ea2c43d71675d17ac8d |
| Issue introduced in 6.8 with commit eaf01ee5ba28b97f96a3d3eec4c5fbfb37ee4cde and fixed in 6.14.4 with commit b5a6f97a78e2fc008fd6503b7040cb7e1120b873 |
| Issue introduced in 6.8 with commit eaf01ee5ba28b97f96a3d3eec4c5fbfb37ee4cde and fixed in 6.15 with commit 4ba2abe154ef68f9612eee9d6fbfe53a1736b064 |
| |
| 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-2025-37763 |
| 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/imagination/pvr_job.c |
| drivers/gpu/drm/imagination/pvr_queue.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/c90b95e12eb88d23740e5ea2c43d71675d17ac8d |
| https://git.kernel.org/stable/c/b5a6f97a78e2fc008fd6503b7040cb7e1120b873 |
| https://git.kernel.org/stable/c/4ba2abe154ef68f9612eee9d6fbfe53a1736b064 |
