VulnerabilityPublished 23 Oct 2026

CVE-2026-98997: Linux kernel · drm/amdgpu/userq: only accept doorbell BOs as queue doorbell

Source GCVE Database

Authoritative record:CVE-2026-98997· Medium

Not known to be exploited · fixed in 8640b3f961d743d6dc0458c2b53a3af434690cc1 : update Linux kernel when convenient.

Data as of 26 Oct 2026, 17:16 UTC

Severity

Medium

Rated by Threat Radar · CVSS not yet scored by NVD

EPSS: 0.1% chance of exploitation in 30 days – higher than 5% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
Patch: Available – fixed in 8640b3f961d743d6dc0458c2b53a3af434690cc1, 112dbe2b10d6d088a6c599980dd960dcbfa55ff0, 7f7c88dbf4d543f6703e53bdeed380e886733167

Exploitation evidence

Disclosed: evidence found.
CVE published 23 Oct 2026
Detectable: no evidence on record.
No public nuclei template indexed
Weaponised: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by Mirage: no evidence on record.
No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 26 Oct 2026.

Disclosed: The CVE record is public on cve.org. Its publication is t = 0.
Detectable: A public nuclei template can find exposed instances, for defenders and attackers alike.
Weaponised: Public exploit code exists in Metasploit or Exploit-DB, or CISA SSVC or the CVSS exploit maturity reports a public proof of concept.
Exploited in the wild: CISA KEV lists it, CISA SSVC rates exploitation active, or a source reports attacks.
Observed by OffSeq Mirage: OffSeq Mirage honeypot sensors recorded attack traffic for this CVE, or found exposed hosts without attack traffic.

Moments are spaced evenly, not to scale; a dashed line marks a gap of six months or more. Deltas count from t = 0. Sources that give only a date (CISA KEV, Exploit-DB, or a time of exactly 00:00Z) read “same day” rather than hours. Metasploit modules carry the flaw’s disclosure date, not their release date, and nuclei templates carry no date, so both appear above but not on the timeline.

ghsa-9mxh-x95w-jrrc

What to do

Upgrade Linux kernel to 8640b3f961d743d6dc0458c2b53a3af434690cc1, 112dbe2b10d6d088a6c599980dd960dcbfa55ff0 or 7f7c88dbf4d543f6703e53bdeed380e886733167.

Affected software

Product	Affected	Fixed in
LinuxLinux	Affected ≥ f09c1e6077abd1bc2ddd2b97e1135215801ca7f9, < 8640b3f961d743d6dc0458c2b53a3af434690cc1	Fixed in 8640b3f961d743d6dc0458c2b53a3af434690cc1
LinuxLinux	Affected ≥ f09c1e6077abd1bc2ddd2b97e1135215801ca7f9, < 112dbe2b10d6d088a6c599980dd960dcbfa55ff0	Fixed in 112dbe2b10d6d088a6c599980dd960dcbfa55ff0
LinuxLinux	Affected ≥ f09c1e6077abd1bc2ddd2b97e1135215801ca7f9, < 7f7c88dbf4d543f6703e53bdeed380e886733167	Fixed in 7f7c88dbf4d543f6703e53bdeed380e886733167
LinuxLinux	Affected =6.16	Fixed in–

AI-suggested

A fix has been applied to the Linux kernel AMDGPU driver that rejects buffer objects not created in the doorbell domain as queue doorbells. Users should update to the kernel version containing this patch to remediate the vulnerability. No additional mitigation steps are indicated.

Description

A vulnerability in the Linux kernel's AMDGPU driver was resolved by restricting doorbell buffer objects (BOs) to only those created in the doorbell domain. The flaw allowed any BO passed as a doorbell handle to be pinned into the doorbell domain, which could cause loss of buffer contents when moved improperly. This could be exploited by a client sharing a buffer with another client on the same device. The fix rejects BOs not created in the doorbell domain.

References

Community reviews

Loading reviews…