Riskcovery

CVE-2026-99003

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

State
Published
Severity
Not scored
Published
Oct 23, 2026
Updated
Oct 23, 2026
Reserved
Sep 25, 2026

Read the record on cve.org

Description

In 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.

Scores

The record has no CVSS score.

Weaknesses

The record names no weakness.

Affected Products

ProductVersions
LinuxLinux
  • de85488138247d034eb3241840424a54d660926b to before 4487cf79bf173f2b426a02d102076f8a20d23b96Affected
  • de85488138247d034eb3241840424a54d660926b to before fdee3570b282a6c8699aea63fa5694355e010ec9Affected
  • de85488138247d034eb3241840424a54d660926b to before 9be126be5f78bc331a930295af97c9b1f9158f06Affected
  • de85488138247d034eb3241840424a54d660926b to before ec86c43dcfff68eab4db9bdafcd3e2b16e342e18Affected
LinuxLinux
  • 6.10Affected
  • before 6.10Not affected
  • 6.12.113 through 6.12.*Not affected
  • 6.18.57 through 6.18.*Not affected
  • 7.2.11 through 7.2.*Not affected
  • 7.3 and laterNot affected

References

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