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CVE-2026-98997— drm/amdgpu/userq: only accept doorbell BOs as queue doorbell

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/amdgpu/userq：仅接受在门铃（doorbell）域中创建的缓冲区对象（BO）作为队列门铃 函数会将任何作为 传入的缓冲区对象（BO）固定（pin）到门铃域中。对于普通 BO，TTM（Translation Table Maps）会通过 将其移动，导致其内容丢失。由于同一设备上的导入者（importer）可以获取导出者（exporter）的 GEM 对象，因此某个客户端可以对另一个客户端与其共享的缓冲区执行此操作，从而引发安全问题。 修复方案：拒绝那些未在

AI Predicted 7.8 Difficulty: Moderate EPSS 0.17% · P6

Possible ATT&CK Techniques 1 AI

T1068.002

Affected Version Matrix 8

VendorProduct Version RangeStatus
Linux Linux f09c1e6077abd1bc2ddd2b97e1135215801ca7f9< 112dbe2b10d6d088a6c599980dd960dcbfa55ff0 affected
f09c1e6077abd1bc2ddd2b97e1135215801ca7f9< 8640b3f961d743d6dc0458c2b53a3af434690cc1 affected
f09c1e6077abd1bc2ddd2b97e1135215801ca7f9< 7f7c88dbf4d543f6703e53bdeed380e886733167 affected
6.16 affected
< 6.16 unaffected
6.18.57≤ 6.18.* unaffected
7.2.11≤ 7.2.* unaffected
7.3≤ * unaffected
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I. Basic Information for CVE-2026-98997

Vulnerability Information
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Vulnerability Title
drm/amdgpu/userq: only accept doorbell BOs as queue doorbell
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: drm/amdgpu/userq: only accept doorbell BOs as queue doorbell amdgpu_userq_get_doorbell_index() pins any BO passed as doorbell_handle into the doorbell domain. For a regular BO, TTM moves it with ttm_bo_move_null() and its contents are lost. Since an importer on the same device gets the exporter's GEM object, a client can do this to a buffer another client shared with it. Reject BOs that were not created in the doorbell domain. v2: drop the error message, use a local abo variable (Christian) (cherry picked from commit f7497bbc19db4821c62b9d97b31c9086feb2d917)
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 f09c1e6077abd1bc2ddd2b97e1135215801ca7f9 ~ 112dbe2b10d6d088a6c599980dd960dcbfa55ff0 -
Linux Linux 6.16 -

II. Public POCs for CVE-2026-98997

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III. Intelligence Information for CVE-2026-98997

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Patches & Fixes for CVE-2026-98997 (3)

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 &rarr; →

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux