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Linux Kernel CVE-2026-31625

| EUVDEUVD-2026-25518 MEDIUM
NULL Pointer Dereference (CWE-476)
2026-04-24 Linux GHSA-9m92-4vqv-mrj9
Denial Of Service Linux Null Pointer Dereference
5.5
CVSS 3.1 · NVD
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Severity by source

NVD PRIMARY
5.5 MEDIUM
AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
vuln.today AI
5.5 MEDIUM

Local-only vector confirmed by hardware and session requirements; PR:L reflects mandatory authenticated local access; sole impact is kernel availability via crash.

3.1 AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
4.0 AV:L/AC:L/AT:P/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
SUSE
MEDIUM
qualitative
Red Hat
4.7 MEDIUM
qualitative

Primary rating from NVD.

CVSS VectorNVD

Attack Vector
Local
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
None
Availability
High

Lifecycle Timeline

6
Analysis Generated
Jul 24, 2026 - 02:52 vuln.today
CVSS changed
Apr 27, 2026 - 21:22 NVD
5.5 (MEDIUM)
Patch released
Apr 27, 2026 - 21:14 nvd
Patch available
Patch available
Apr 24, 2026 - 16:16 EUVD
EUVD ID Assigned
Apr 24, 2026 - 15:00 euvd
EUVD-2026-25518
CVE Published
Apr 24, 2026 - 14:42 nvd
MEDIUM 5.5

DescriptionCVE.org

In the Linux kernel, the following vulnerability has been resolved:

HID: alps: fix NULL pointer dereference in alps_raw_event()

Commit ecfa6f34492c ("HID: Add HID_CLAIMED_INPUT guards in raw_event callbacks missing them") attempted to fix up the HID drivers that had missed the previous fix that was done in 2ff5baa9b527 ("HID: appleir: Fix potential NULL dereference at raw event handle"), but the alps driver was missed.

Fix this up by properly checking in the hid-alps driver that it had been claimed correctly before attempting to process the raw event.

AnalysisAI

NULL pointer dereference in the Linux kernel hid-alps driver crashes systems with Alps HID touchpad hardware when raw events are processed before the device is fully claimed. Local low-privileged users on affected systems can trigger a kernel panic, causing a denial of service. No public exploit exists (EPSS 0.02%, 5th percentile) and no KEV listing has been issued; however, patches are confirmed across multiple stable branches including 6.12.83, 6.18.24, 6.19.14, and 7.0.1.

Technical ContextAI

The Linux kernel's HID (Human Interface Device) subsystem provides a framework for processing raw input events from hardware such as touchpads. The hid-alps driver (handling Alps-branded HID pointing devices) exposes a raw_event callback alps_raw_event() that was missing a HID_CLAIMED_INPUT guard - a check ensuring the HID device has been fully claimed by the driver before event data is processed. CWE-476 (NULL Pointer Dereference) applies because accessing unclaimed HID structures yields a NULL pointer, crashing the kernel. A prior sweep fix (commit ecfa6f34492c) intended to retrofit all drivers lacking this guard after the original appleir fix (2ff5baa9b527) but inadvertently omitted the alps driver. Affected CPE: cpe:2.3:a:linux:linux:*:*:*:*:*:*:*:*.

RemediationAI

Upgrade to a patched Linux kernel stable release: 6.12.83, 6.18.24, 6.19.14, or 7.0.1 depending on the active stable branch. Upstream commits are available at https://git.kernel.org/stable/c/ee2cb3ddfdca949dbc0c3f796ed5a439f0efc9f6 (6.18.x), https://git.kernel.org/stable/c/4b618248d2307a219d9431a730cfe1156c8e3386 (6.19.x), and https://git.kernel.org/stable/c/8eed7bce7a4c41ab28ee4891103623a12fd41611. Ubuntu users should apply the packages referenced in USN-8488-1 at https://ubuntu.com/security/notices/USN-8488-1. As a compensating control on systems where patching is temporarily infeasible, administrators can blacklist the hid-alps module by adding blacklist hid-alps to /etc/modprobe.d/blacklist.conf and running modprobe -r hid-alps, eliminating the attack surface entirely - trade-off is loss of Alps touchpad functionality on affected hardware. This workaround has no effect on systems without Alps HID devices.

Same weakness CWE-476 – NULL Pointer Dereference

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Vendor StatusVendor

SUSE

Severity: Medium
Product Status
SUSE Linux Enterprise Desktop 15 SP7 Fixed
SUSE Linux Enterprise Desktop 15 SP7 Fixed
SUSE Linux Enterprise High Availability Extension 15 SP7 Fixed
SUSE Linux Enterprise High Availability Extension 15 SP7 Fixed
SUSE Linux Enterprise High Performance Computing 15 SP7 Fixed

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CVE-2026-31625 vulnerability details – vuln.today
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