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CVE-2026-99003— drm/panthor: validate userspace queue count against initialized firmware slot count

Quick assessment

Affected

Linux Linux

Exploitation

No confirmed in-the-wild exploitation; assess based on exposure

Recommended action

Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

在 Linux 内核中，以下漏洞已被修复： drm/panthor：针对已初始化的固件插槽数量验证用户空间的队列数量在文件的函数中，队列数量仅与硬编码的最大值进行了校验：然而，如果固件报告的可用插槽数量少于，函数将只会初始化相应数量的流接口（stream interfaces）。如果非特权用户空间请求的队列数量超过了固件报告的数量（但未超过），函数将会获取一个未初始化的流接口。在随后解引用时，可能导致系统崩溃。

AI Predicted 7.8 Difficulty: Moderate EPSS 0.17% · P6 Updated Oct 23, 2026

Possible ATT&CK Techniques 1 AI

T1203 · Exploitation for Client Execution

Affected Version Matrix 10

Vendor	Product	Version Range	Status
Linux	Linux	`de85488138247d034eb3241840424a54d660926b< 4487cf79bf173f2b426a02d102076f8a20d23b96`	affected
		`de85488138247d034eb3241840424a54d660926b< fdee3570b282a6c8699aea63fa5694355e010ec9`	affected
		`de85488138247d034eb3241840424a54d660926b< 9be126be5f78bc331a930295af97c9b1f9158f06`	affected
		`de85488138247d034eb3241840424a54d660926b< ec86c43dcfff68eab4db9bdafcd3e2b16e342e18`	affected
		`6.10`	affected
		`< 6.10`	unaffected
		`6.12.113≤ 6.12.*`	unaffected
		`6.18.57≤ 6.18.*`	unaffected
… +2 more rows

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Vulnerability Information

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Vulnerability Title

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

Source: CVE Program / CVE List V5

Vulnerability 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.

Source: CVE Program / CVE List V5

CVSS Information

N/A

Source: CVE Program / CVE List V5

Vulnerability Type

N/A

Source: CVE Program / CVE List V5

Affected Products

Vendor	Product	Affected Versions	CPE	Subscribe
Linux	Linux	de85488138247d034eb3241840424a54d660926b ~ 4487cf79bf173f2b426a02d102076f8a20d23b96	-
Linux	Linux	6.10	-

II. Public POCs for CVE-2026-99003

#	POC Description	Source Link	Shenlong Link

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III. Intelligence Information for CVE-2026-99003

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Patches & Fixes for CVE-2026-99003 (4)

https://www.cve.org/CVERecord?id=CVE-2026-99003

Same Patch Batch · Linux · 2026-10-23 · 217 CVEs total

CVE-2026-98959	9.8 CRITICAL	btrfs: fix xattr replace when multiple xattrs are packed in the same item
CVE-2026-99078	9.8 CRITICAL	net/mlx5e: Prevent stale XSK buffer release on MPWQE refill retry
CVE-2026-99079	9.8 CRITICAL	net/mlx5e: Prevent stale XSK buffer release on refill retry
CVE-2026-98988	8.8 HIGH	namespace: keep covered mounts covered in OPEN_TREE_NAMESPACE
CVE-2026-99083	8.8 HIGH	ksmbd: fix heap out-of-bounds write in krb5_authenticate()
CVE-2026-99082	8.8 HIGH	KVM: x86: Use active memslots for the per-vCPU MMIO cache
CVE-2026-98870	8.8 HIGH	ksmbd: remove stale channels from all sessions on teardown
CVE-2026-98980	8.8 HIGH	namei: don't reveal overmounted entries in refwalk
CVE-2026-98981	8.8 HIGH	namespace: unhash a dentry before detaching the mounts on it
CVE-2026-99042	8.4 HIGH	io_uring/net: populate CONNECT filter fields for 24-byte sockaddr_in6
CVE-2026-98978	8.4 HIGH	namespace: never expire a locked mount
CVE-2026-99064	8.1 HIGH	cipso: adjust cached option offsets when removing CIPSO
CVE-2026-98968	8.1 HIGH	amt: send the relay's General Query directly from the receive path
CVE-2026-98993	7.8 HIGH	namespace: don't inherit MNT_UMOUNT in clone_mnt()
CVE-2026-99053	7.8 HIGH	tipc: hold a reference to nodes found by link name
CVE-2026-99054	7.8 HIGH	tipc: destroy topsrv workqueues before closing connections
CVE-2026-99056	7.8 HIGH	strparser: make sure __strp_recv isn't running before tearing down the parser
CVE-2026-99002	7.8 HIGH	drm/vmwgfx: validate pitch coming from userspace
CVE-2026-98899	7.8 HIGH	netfilter: ipset: mark the rcu locked areas properly
CVE-2026-99006	7.8 HIGH	drm/i915/gem: Prevent overstepping exec array boundary

Showing top 20 of 217 CVEs. View all on vendor page → →

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