drm/panthor: validate userspace queue count against initialized firmware slot count

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Summary

CVECVE-2026-99003
StatePUBLISHED
AssignerLinux
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-10-23 13:17:22 UTC
Updated2026-10-23 13:17:22 UTC
DescriptionIn the Linux kernel, the following vulnerability has been resolved: drm/panthor: validate userspace queue count against initialized firmware slot count In panthor_drv.c:panthor_ioctl_group_create(), the queue count is validated against the hardcoded maximum: if (!args->queues.count || args->queues.count > MAX_CS_PER_CSG) return -EINVAL; However, if the firmware reports fewer slots than MAX_CS_PER_CSG, panthor_fw_init_ifaces() will only initialize that smaller number of stream interfaces. If unprivileged userspace requests more queues than the firmware reported (but no more than MAX_CS_PER_CSG), cs_slot_prog_locked() fetches an uninitialized stream interface and may crash when dereferencing cs_iface->input->ringbuf_base.

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Linux Linux affected de85488138247d034eb3241840424a54d660926b 4487cf79bf173f2b426a02d102076f8a20d23b96 git Not specified
CNA Linux Linux affected de85488138247d034eb3241840424a54d660926b fdee3570b282a6c8699aea63fa5694355e010ec9 git Not specified
CNA Linux Linux affected de85488138247d034eb3241840424a54d660926b 9be126be5f78bc331a930295af97c9b1f9158f06 git Not specified
CNA Linux Linux affected de85488138247d034eb3241840424a54d660926b ec86c43dcfff68eab4db9bdafcd3e2b16e342e18 git Not specified
CNA Linux Linux affected 6.10 Not specified
CNA Linux Linux unaffected 6.10 semver Not specified
CNA Linux Linux unaffected 6.12.113 6.12.* semver Not specified
CNA Linux Linux unaffected 6.18.57 6.18.* semver Not specified
CNA Linux Linux unaffected 7.2.11 7.2.* semver Not specified
CNA Linux Linux unaffected 7.3 * original_commit_for_fix Not specified

References

ReferenceSourceLinkTags
git.kernel.org/stable/c/9be126be5f78bc331a930295af97c9b1f9158f06 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/fdee3570b282a6c8699aea63fa5694355e010ec9 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/ec86c43dcfff68eab4db9bdafcd3e2b16e342e18 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/4487cf79bf173f2b426a02d102076f8a20d23b96 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
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