Linux Kernel up to 6.12.109/6.18.50/7.2.4 amdkfd amdkfd.c create_queue_cpsch/create_queue_nocpsch null pointer dereference

CVSS Meta Temp Score
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CTI Interest Score
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4.2$0-$5k0.00

Summaryinfo

A vulnerability was found in Linux Kernel up to 6.12.109/6.18.50/7.2.4. It has been rated as problematic. This issue affects the function create_queue_cpsch/create_queue_nocpsch of the file drivers/gpu/drm/amd/amdkfd/amdkfd.c of the component amdkfd. The manipulation leads to null pointer dereference. This vulnerability is traded as CVE-2026-89807. An attack has to be approached locally. There is no exploit available. Upgrading the affected component is advised.

Detailsinfo

A vulnerability was found in Linux Kernel up to 6.12.109/6.18.50/7.2.4. It has been rated as problematic. This issue affects the function create_queue_cpsch/create_queue_nocpsch of the file drivers/gpu/drm/amd/amdkfd/amdkfd.c of the component amdkfd. The manipulation with an unknown input leads to a null pointer dereference vulnerability. Using CWE to declare the problem leads to CWE-476. A NULL pointer dereference occurs when the application dereferences a pointer that it expects to be valid, but is NULL, typically causing a crash or exit. Impacted is availability. The summary by CVE is:

In the Linux kernel, the following vulnerability has been resolved: drm/amdkfd: guard against NULL restore_mqd in CRIU queue restore Both create_queue_cpsch() and create_queue_nocpsch() unconditionally call mqd_mgr->restore_mqd() when a CRIU restore is in progress (qd != NULL), with no NULL guard. On any system where restore_mqd is not implemented for the given queue type, a user holding CAP_CHECKPOINT_RESTORE can trigger a kernel NULL pointer dereference and panic the machine by issuing KFD_IOC_CRIU_OP_RESTORE with a crafted queue restore object. Note that checkpoint_mqd is likewise unimplemented on GFX12, so no legitimate CRIU image can reach this path — only a hand-crafted restore payload. Add a NULL guard for restore_mqd immediately after mqd_mgr is resolved, unwinding via the existing error labels and returning -EOPNOTSUPP if the callback is not implemented. This mirrors the existing checkpoint_mqd guard in checkpoint_mqd().

The advisory is shared at git.kernel.org. The identification of this vulnerability is CVE-2026-89807 since 09/11/2026. The exploitation is known to be easy. An attack has to be approached locally. Additional levels of successful authentication are needed for exploitation. Technical details are known, but no exploit is available.

Upgrading to version 6.12.110, 6.18.51, 7.2.5 or 7.3-rc1 eliminates this vulnerability. Applying the patch 19c73848493ab58e39649700da6de11710a36de1/ebffa44e7a21ead59ac4b4264e8fc2cbb44c4a21/c643c229babe2e8efc5eefe60e19d44868a643ff/6aa530642f95d5c48aa336416f94a35e7949b647 is able to eliminate this problem. The best possible mitigation is suggested to be upgrading to the latest version.

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Productinfo

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CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 4.4
VulDB Meta Temp Score: 4.2

VulDB Base Score: 4.4
VulDB Temp Score: 4.2
VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv2info

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

Exploitinginfo

Class: Null pointer dereference
CWE: CWE-476 / CWE-404
CAPEC: 🔒
ATT&CK: 🔒

Physical: Partially
Local: Yes
Remote: No

Availability: 🔒
Status: Not defined
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 6.12.110/6.18.51/7.2.5/7.3-rc1
Patch: 19c73848493ab58e39649700da6de11710a36de1/ebffa44e7a21ead59ac4b4264e8fc2cbb44c4a21/c643c229babe2e8efc5eefe60e19d44868a643ff/6aa530642f95d5c48aa336416f94a35e7949b647

Timelineinfo

09/11/2026 CVE reserved
09/16/2026 +5 days Advisory disclosed
09/16/2026 +0 days VulDB entry created
09/16/2026 +0 days VulDB entry last update

Sourcesinfo

Vendor: kernel.org

Advisory: git.kernel.org
Status: Confirmed

CVE: CVE-2026-89807 (🔒)
GCVE (CVE): GCVE-0-2026-89807
GCVE (VulDB): GCVE-100-405629

Entryinfo

Created: 09/16/2026 12:58
Changes: 09/16/2026 12:58 (60)
Complete: 🔍
Cache ID: 216::103

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