CVE-2026-31524

Local denial of service via HID buffer leak

Published Apr 22, 2026 · Updated Apr 22, 2026

Memory leak in the ASUS HID driver in Linux Kernel allows local users to exhaust kernel memory through repeated device initialization. The asus_report_fixup() function returns a newly allocated kmemdup() buffer to a caller that does not take ownership, so each affected initialization permanently retains the allocation. Exploitation requires local low-privileged access and an affected ASUS HID path; the documented security impact is loss of availability, while the accompanying descriptor over-read is described as harmless.

CVSS severity5.5
Medium
EPSS probability0.12%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Memory leak in the ASUS HID driver in Linux Kernel allows local users to exhaust kernel memory through repeated device initialization. The asus_report_fixup() function returns a newly allocated kmemdup() buffer to a caller that does not take ownership, so each affected initialization permanently retains the allocation. Exploitation requires local low-privileged access and an affected ASUS HID path; the documented security impact is loss of availability, while the accompanying descriptor over-read is described as harmless.

The record

CVE
CVE-2026-31524
Published
Apr 22, 2026
Updated
Apr 22, 2026
Vendor
The Linux Kernel Organization
Product
Linux Kernel
Classifications
CWE-401, T1499
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Apr 22, 2026CVE publishedPublication date reported by the CVE source.
  2. Apr 22, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <2bad24c17742fc88973d6aea526ce1353f5334a3
  2. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <2e4fe6b15c2f390c023b20d728b1a3fe7ea4f973
  3. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <726765b43deb2b4723869d673cc5fc6f7a3b2059
  4. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <7a6d6e4d8af044f94fa97e97af5ff2771e1fbebd
  5. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <84724ac4821a160d47b84289adf139023027bdbb
  6. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <a41cc7c1668e44ff2c2d36f9a6353253ffc43e3c
  7. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <ede95cfcab8064d9a08813fbd7ed42cea8843dcf
  8. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <f20f17cffbe34fb330267e0f8084f5565f807444

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linux Kernelversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <2bad24c17742fc88973d6aea526ce1353f5334a3; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <2e4fe6b15c2f390c023b20d728b1a3fe7ea4f973; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <726765b43deb2b4723869d673cc5fc6f7a3b2059; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <7a6d6e4d8af044f94fa97e97af5ff2771e1fbebd; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <84724ac4821a160d47b84289adf139023027bdbb; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <a41cc7c1668e44ff2c2d36f9a6353253ffc43e3c; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <ede95cfcab8064d9a08813fbd7ed42cea8843dcf; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <f20f17cffbe34fb330267e0f8084f5565f807444

Published CVSS scores

5.5UbuntuCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
5.5Oracle LinuxCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
5.5NIST NVDCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-401Missing Release of Memory after Effective Lifetime
T1499Endpoint Denial of Service

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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