# CVE-2026-99003: linux: In the Linux kernel, the following vulnerability has been resolved:  drm/panthor: validate userspace queue count agai...

CVE-2026-99003 is fixed in linux on 1 platform, first by DEBIAN-CVE-2026-99003, released October 24, 2026. It is not reported as exploited. Patch Radar priority: Routine.

- Web page: https://patchblox.com/security/cve/CVE-2026-99003
- Priority: Routine
- CVSS: n/a
- EPSS: 0.0017
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Oct 23, 2026

## 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.

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | linux Debian 13.5 (trixie) | 6.12.113-1 | [DEBIAN-CVE-2026-99003](https://patchblox.com/security/data/fix/linux/debian-cve-2026-99003.md) | Oct 24, 2026 |
| Linux | linux Debian 14 | 7.2.11-1 | [DEBIAN-CVE-2026-99003](https://patchblox.com/security/data/fix/linux/debian-cve-2026-99003.md) | Oct 24, 2026 |

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Data as of 2026-11-08T06:59:42Z UTC. Source: Patchblox Patch Radar (https://patchblox.com/security/patch-radar). Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo

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