Linux Kernel up to 6.18.18/6.19.8 amdgpu_userq_wait_ioctl memory leak

CVSS Meta Temp Score
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CTI Interest Score
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5.5$0-$5k0.00

Summaryinfo

A vulnerability has been found in Linux Kernel up to 6.18.18/6.19.8 and classified as critical. Affected by this vulnerability is the function amdgpu_userq_wait_ioctl. This manipulation causes memory leak. This vulnerability is tracked as CVE-2026-43399. No exploit exists. The affected component should be upgraded.

Detailsinfo

A vulnerability classified as critical was found in Linux Kernel up to 6.18.18/6.19.8. Affected by this vulnerability is the function amdgpu_userq_wait_ioctl. The manipulation with an unknown input leads to a memory leak vulnerability. The CWE definition for the vulnerability is CWE-401. The product does not sufficiently track and release allocated memory after it has been used, which slowly consumes remaining memory. As an impact it is known to affect availability. The summary by CVE is:

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)

The advisory is shared at git.kernel.org. This vulnerability is known as CVE-2026-43399 since 05/01/2026. Technical details are known, but no exploit is available.

Upgrading to version 6.18.19 or 6.19.9 eliminates this vulnerability. Applying the patch 762f47e2b824383d5be65eee2c40a1269b7d50c8/5409247d41f372bec5b141ef599f2d9f5e81b746/49abfa812617a7f2d0132c70d23ac98b389c6ec1 is able to eliminate this problem. The bugfix is ready for download at git.kernel.org. The best possible mitigation is suggested to be upgrading to the latest version.

If you want to get the best quality for vulnerability data then you always have to consider VulDB.

Productinfo

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CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 5.6
VulDB Meta Temp Score: 5.5

VulDB Base Score: 5.7
VulDB Temp Score: 5.5
VulDB Vector: 🔒
VulDB Reliability: 🔍

NVD Base Score: 5.5
NVD Vector: 🔒

CVSSv2info

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VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: Memory leak
CWE: CWE-401 / CWE-404
CAPEC: 🔒
ATT&CK: 🔒

Physical: Partially
Local: Yes
Remote: Partially

Availability: 🔒
Status: Not defined

EPSS Score: 🔒
EPSS Percentile: 🔒

Price Prediction: 🔍
Current Price Estimation: 🔒

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Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔒

Upgrade: Kernel 6.18.19/6.19.9
Patch: 762f47e2b824383d5be65eee2c40a1269b7d50c8/5409247d41f372bec5b141ef599f2d9f5e81b746/49abfa812617a7f2d0132c70d23ac98b389c6ec1

Timelineinfo

05/01/2026 CVE reserved
05/08/2026 +7 days Advisory disclosed
05/08/2026 +0 days VulDB entry created
05/22/2026 +13 days VulDB entry last update

Sourcesinfo

Vendor: kernel.org

Advisory: git.kernel.org
Status: Confirmed

CVE: CVE-2026-43399 (🔒)
GCVE (CVE): GCVE-0-2026-43399
GCVE (VulDB): GCVE-100-362197

Entryinfo

Created: 05/08/2026 18:22
Updated: 05/22/2026 01:37
Changes: 05/08/2026 18:22 (58), 05/22/2026 01:37 (10)
Complete: 🔍
Cache ID: 216::103

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