Linux Kernel up to 7.2.5 ACPI Notify san_probe null pointer dereference

CVSS Meta Temp Score
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CTI Interest Score
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7.4$0-$5k0.00

Summaryinfo

A vulnerability labeled as critical has been found in Linux Kernel up to 7.2.5. Affected by this vulnerability is the function san_probe of the component ACPI Notify. The manipulation results in null pointer dereference. This vulnerability was named CVE-2026-93114. The attack needs to be approached locally. There is no available exploit. The affected component should be upgraded.

Detailsinfo

A vulnerability classified as critical has been found in Linux Kernel up to 7.2.5. Affected is the function san_probe of the component ACPI Notify. 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 confidentiality, integrity, and availability. CVE summarizes:

In the Linux kernel, the following vulnerability has been resolved: platform/surface: acpi-notify: Check ACPI companion before use Since every platform driver can be forced to match a device that doesn't match its list of device IDs because of device_match_driver_override(), platform drivers that rely on the existence of a device's ACPI companion object should verify its presence. san_probe() dereferences the result of ACPI_COMPANION() when installing the GSBUS address space handler, so force-binding the driver to a device without an ACPI companion leads to a NULL pointer dereference. The dereference was introduced when the probe function was switched from ACPI_HANDLE() to ACPI_COMPANION(). Check the ACPI companion against NULL and return -ENODEV when it is missing, like commit e4865a56d013 ("ACPI: driver: Check ACPI_COMPANION() against NULL during probe") does for the core ACPI platform drivers.

The advisory is shared for download at git.kernel.org. This vulnerability is traded as CVE-2026-93114 since 09/17/2026. The exploitability is told to be easy. The attack needs to be approached locally. Additional levels of successful authentication are necessary for exploitation. Successful exploitation requires user interaction by the victim. There are known technical details, but no exploit is available.

Upgrading to version 5.15.221, 6.1.188, 6.6.157, 6.12.110, 6.18.52, 7.2.6 or 7.3-rc1 eliminates this vulnerability. Applying the patch 4faa43d4ef0b98beb6c2b77a279f4aa5d7fa2d13/3855be0100efb98c26228c610db70a673611f3bd/f276b62f2ce1cbff7fa50a8ee5afd8fef5a60897/9b6479da662c2ec4e931ed9f7228df46aa8c3766/7fea5a310e3b2db24f7aafe64897e4e659ffbb7d/428a82d987fcd8844e8868c85582eae75b4b5c51/2b3a5dabe89e330413af403246b648c1890f368f 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: 7.7
VulDB Meta Temp Score: 7.4

VulDB Base Score: 7.7
VulDB Temp Score: 7.4
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: 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 5.15.221/6.1.188/6.6.157/6.12.110/6.18.52/7.2.6/7.3-rc1
Patch: 4faa43d4ef0b98beb6c2b77a279f4aa5d7fa2d13/3855be0100efb98c26228c610db70a673611f3bd/f276b62f2ce1cbff7fa50a8ee5afd8fef5a60897/9b6479da662c2ec4e931ed9f7228df46aa8c3766/7fea5a310e3b2db24f7aafe64897e4e659ffbb7d/428a82d987fcd8844e8868c85582eae75b4b5c51/2b3a5dabe89e330413af403246b648c1890f368f

Timelineinfo

09/17/2026 Advisory disclosed
09/17/2026 +0 days CVE reserved
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-2026-93114 (🔒)
GCVE (CVE): GCVE-0-2026-93114
GCVE (VulDB): GCVE-100-407088

Entryinfo

Created: 09/17/2026 23:03
Changes: 09/17/2026 23:03 (59)
Complete: 🔍
Cache ID: 216::103

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