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CVE-2026-99004— drm/imagination: Size page table preallocation by device address

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/imagination：根据设备地址调整页表预分配大小提交 0a8224058a58（"drm/imagination：修复 map() 接口的页表页数计算”）将设备地址传递给了，但预分配的大小仍基于计算，且采用“排他性结束”（exclusive end）的方式。然而，对象页内的偏移量在设备虚拟地址范围内并无意义；此外，当地址范围恰好在页表边界结束时，这种排他性结束方式会导致多分配一个页表。修复方案改为：从设备地址开始，以范围的“包含性结束”（inclus

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

Possible ATT&CK Techniques 1 AI

T1499 · Endpoint Denial of Service

Affected Version Matrix 10

Vendor	Product	Version Range	Status
Linux	Linux	`ff5f643de0bf27874c4033cd57a0bd034b5c7d11< 51b56bad96fd20127034f660b337c00317c65151`	affected
		`ff5f643de0bf27874c4033cd57a0bd034b5c7d11< f9b215b3e37a5047c406545de51bf8a2aeb4cd1c`	affected
		`ff5f643de0bf27874c4033cd57a0bd034b5c7d11< 7f73da0facf864fe796371ebaccacb1fee678aaf`	affected
		`ff5f643de0bf27874c4033cd57a0bd034b5c7d11< 789f290b2e81d42820bddcb4010ffbc2ae2ded54`	affected
		`6.8`	affected
		`< 6.8`	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/imagination: Size page table preallocation by device address

Source: CVE Program / CVE List V5

Vulnerability Description

In the Linux kernel, the following vulnerability has been resolved: drm/imagination: Size page table preallocation by device address Commit 0a8224058a58 ("drm/imagination: Fix page count for page table for map() interface") passed the device address to pvr_mmu_op_context_create(), but the preallocation is still sized from device_addr + sgt_offset with an exclusive end. The offset into the object's pages has no place in a device-virtual range, and the exclusive end allocates one table too many when the range ends on a table boundary. Count the tables from device_addr and the inclusive end of the range. The new calculation does not take page table indices into account. This fixes another issue with the previous implementation, where the difference between start and end indices could underflow when a mapping crossed a page table boundary. This would lead to the driver preallocating a huge number of MMU pages, exhausting system memory and triggering an out of memory panic. [Alessio: add paragraph to point out OOM bug being fixed, cc stable]

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	ff5f643de0bf27874c4033cd57a0bd034b5c7d11 ~ 51b56bad96fd20127034f660b337c00317c65151	-
Linux	Linux	6.8	-

II. Public POCs for CVE-2026-99004

#	POC Description	Source Link	Shenlong Link

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III. Intelligence Information for CVE-2026-99004

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Patches & Fixes for CVE-2026-99004 (2)

https://www.cve.org/CVERecord?id=CVE-2026-99004

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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