VulnerabilityPublished 8 May 2026Updated 6 Nov 2026

CVE-2026-43399: Linux kernel · drm/amdgpu/userq: Fix reference leak in amdgpu_userq_wait_ioctl

Affects Linux kernelSource CVE Database V5

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Not known to be exploited · fixed in 5409247d41f372bec5b141ef599f2d9f5e81b746 : update Linux kernel when convenient.

Data as of 6 Nov 2026, 16:04 UTC

Severity

Unrated

Rated by Threat Radar · No CVSS score from NVD or the CNA

Thin evidence

One scorer or none

Exploitation: No evidence of active exploitation and no public proof of concept
Automatable: Attackers cannot reliably automate steps 1–4 of the kill chain
Technical impact: Limited control over the software or limited information exposure

CISA SSVC assessment, 2026-11-06.

Patch

Available – fixed in 5409247d41f372bec5b141ef599f2d9f5e81b746, 762f47e2b824383d5be65eee2c40a1269b7d50c8, 49abfa812617a7f2d0132c70d23ac98b389c6ec1

Exploitation evidence

Disclosed: evidence found.
CVE published 8 May 2026
Detectable: no evidence on record.
No public nuclei template indexed
Weaponized: 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 6 Nov 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.
Weaponized: A Metasploit exploit module or Exploit-DB entry exists (Metasploit scanner modules do not count), 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.

What to do

Upgrade Linux kernel to 5409247d41f372bec5b141ef599f2d9f5e81b746, 762f47e2b824383d5be65eee2c40a1269b7d50c8 or 49abfa812617a7f2d0132c70d23ac98b389c6ec1.

Affected software

Product	Affected	Fixed in
LinuxLinux	Affected ≥ a292fdecd72834b3bec380baa5db1e69e7f70679, < 5409247d41f372bec5b141ef599f2d9f5e81b746	Fixed in 5409247d41f372bec5b141ef599f2d9f5e81b746
LinuxLinux	Affected ≥ a292fdecd72834b3bec380baa5db1e69e7f70679, < 762f47e2b824383d5be65eee2c40a1269b7d50c8	Fixed in 762f47e2b824383d5be65eee2c40a1269b7d50c8
LinuxLinux	Affected ≥ a292fdecd72834b3bec380baa5db1e69e7f70679, < 49abfa812617a7f2d0132c70d23ac98b389c6ec1	Fixed in 49abfa812617a7f2d0132c70d23ac98b389c6ec1
LinuxLinux	Affected =6.16	Fixed in–

Description

In the Linux kernel, the following vulnerability has been resolved: drm/amdgpu/userq: Fix reference leak in amdgpu_userq_wait_ioctl Drop reference to syncobj and timeline fence when aborting the ioctl due output array being too small. (cherry picked from commit 68951e9c3e6bb22396bc42ef2359751c8315dd27)

References

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