CVE-2025-38515
drm/sched: Increment job count before swapping tail spsc queue
CVSS Score
0.0
EPSS Score
0.0%
EPSS Percentile
0th
In the Linux kernel, the following vulnerability has been resolved: drm/sched: Increment job count before swapping tail spsc queue A small race exists between spsc_queue_push and the run-job worker, in which spsc_queue_push may return not-first while the run-job worker has already idled due to the job count being zero. If this race occurs, job scheduling stops, leading to hangs while waiting on the job’s DMA fences. Seal this race by incrementing the job count before appending to the SPSC queue. This race was observed on a drm-tip 6.16-rc1 build with the Xe driver in an SVM test case.
| Vendor | linux |
| Product | linux |
| Ecosystems | |
| Industries | Technology |
| Published | Aug 16, 2025 |
| Last Updated | May 11, 2026 |
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Affected Versions
Linux / Linux
27105db6c63a571b91d01e749d026105a1e63bcf < 549a9c78c3ea6807d0dc4162a4f5ba59f217d5a0 27105db6c63a571b91d01e749d026105a1e63bcf < e62f51d0ec8a9baf324caf9a564f8e318d36a551 27105db6c63a571b91d01e749d026105a1e63bcf < ef841f8e4e1ff67817ca899bedc5ebb00847c0a7 27105db6c63a571b91d01e749d026105a1e63bcf < f9a4f28a4fc4ee453a92a9abbe36e26224d17749 27105db6c63a571b91d01e749d026105a1e63bcf < c64f5310530baf75328292f9b9f3f2961d185183 27105db6c63a571b91d01e749d026105a1e63bcf < e2d6547dc8b9b332f9bc00875197287a6a4db65a 27105db6c63a571b91d01e749d026105a1e63bcf < ef58a95457466849fa7b31fd3953801a5af0f58b 27105db6c63a571b91d01e749d026105a1e63bcf < 8af39ec5cf2be522c8eb43a3d8005ed59e4daaee
Linux / Linux
4.16
References
git.kernel.org: https://git.kernel.org/stable/c/549a9c78c3ea6807d0dc4162a4f5ba59f217d5a0 git.kernel.org: https://git.kernel.org/stable/c/e62f51d0ec8a9baf324caf9a564f8e318d36a551 git.kernel.org: https://git.kernel.org/stable/c/ef841f8e4e1ff67817ca899bedc5ebb00847c0a7 git.kernel.org: https://git.kernel.org/stable/c/f9a4f28a4fc4ee453a92a9abbe36e26224d17749 git.kernel.org: https://git.kernel.org/stable/c/c64f5310530baf75328292f9b9f3f2961d185183 git.kernel.org: https://git.kernel.org/stable/c/e2d6547dc8b9b332f9bc00875197287a6a4db65a git.kernel.org: https://git.kernel.org/stable/c/ef58a95457466849fa7b31fd3953801a5af0f58b git.kernel.org: https://git.kernel.org/stable/c/8af39ec5cf2be522c8eb43a3d8005ed59e4daaee lists.debian.org: https://lists.debian.org/debian-lts-announce/2025/10/msg00008.html lists.debian.org: https://lists.debian.org/debian-lts-announce/2025/10/msg00007.html