Linux Kernel up to 7.2.5 arm_mpam mpam_disable null pointer dereference

CVSS Meta Temp Score
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CTI Interest Score
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4.0$0-$5k0.00+

Summaryinfo

A vulnerability, which was classified as problematic, was found in Linux Kernel up to 7.2.5. This impacts the function mpam_disable of the component arm_mpam. The manipulation results in null pointer dereference. This vulnerability is known as CVE-2026-90271. Attacking locally is a requirement. No exploit is available. You should upgrade the affected component.

Detailsinfo

A vulnerability classified as problematic has been found in Linux Kernel up to 7.2.5. Affected is the function mpam_disable of the component arm_mpam. The manipulation with an unknown input leads to a null pointer dereference vulnerability. CWE is classifying the issue as 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. This is going to have an impact on availability. CVE summarizes:

In the Linux kernel, the following vulnerability has been resolved: arm_mpam: Fix a NULL pointer dereference on unbinding after an error interrupt If a user unbinds an MSC after mpam_disable() has been run in response to an error interrupt then a dereference of a NULL pointer occurs as mpam_disable() sets the drvdata to NULL. Add an early return to the driver remove callback to avoid this.

The advisory is shared for download at git.kernel.org. This vulnerability is traded as CVE-2026-90271 since 09/11/2026. The exploitability is told to be easy. The attack needs to be approached locally. The exploitation requires an enhanced level of successful authentication. Successful exploitation requires user interaction by the victim. There are known technical details, but no exploit is available.

Upgrading to version 7.2.6 or 7.3-rc1 eliminates this vulnerability. Applying the patch a29044c9c83513c7463de2adb84c169685562ad2/fc996c39689bb15aa80e5366809434f7258fb703 is able to eliminate this problem. The best possible mitigation is suggested to be upgrading to the latest version.

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Productinfo

Type

Vendor

Name

Version

License

Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 4.2
VulDB Meta Temp Score: 4.0

VulDB Base Score: 4.2
VulDB Temp Score: 4.0
VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv2info

AVACAuCIA
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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: Partially

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 7.2.6/7.3-rc1
Patch: a29044c9c83513c7463de2adb84c169685562ad2/fc996c39689bb15aa80e5366809434f7258fb703

Timelineinfo

09/11/2026 CVE reserved
09/17/2026 +6 days Advisory disclosed
09/17/2026 +0 days VulDB entry created
09/17/2026 +0 days VulDB entry last update

Sourcesinfo

Vendor: kernel.org

Advisory: git.kernel.org
Status: Confirmed

CVE: CVE-2026-90271 (🔒)
GCVE (CVE): GCVE-0-2026-90271
GCVE (VulDB): GCVE-100-406800

Entryinfo

Created: 09/17/2026 21:15
Changes: 09/17/2026 21:15 (59)
Complete: 🔍
Cache ID: 216::103

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