What is CVE-2026-31522?

CVE-2026-31522 is a Medium severity Linux kernel vulnerability with a CVSS score of 5.5 out of 10, classified as a Memory Leak flaw (CWE-401), affecting Linux kernel versions from 5.15.17 onward and patched in 5.15.203, 6.1.168, 6.6.131 and others. CVE-2026-31522 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

What is the CVSS score for CVE-2026-31522?

CVE-2026-31522 has a CVSS score of 5.5 out of 10, rated Medium severity. The vector string is CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H.

Is there a patch available for CVE-2026-31522?

Yes, CVE-2026-31522 has been patched. Fixed versions include 5.15.203, 6.1.168, 6.6.131 and others. If you are running Linux kernel 5.15.17 or later up to the fix versions, apply the relevant patch for your kernel branch.

Is CVE-2026-31522 actively exploited?

CVE-2026-31522 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

What is Memory Leak (CWE-401)?

The product does not release memory after use, causing gradual resource exhaustion. See MITRE CWE for full details: https://cwe.mitre.org/data/definitions/401.html

CVE-2026-31522

Medium

In the Linux kernel, the following vulnerability has been resolved: HID: magicmouse: avoid memory leak in magicmouse_report_fixup() The magicmouse_report_fixup() function was returning a newly kmemdup()-allocated buffer, but never freeing it. The caller of report_fixup() does not take ownership of the returned pointer, but it *is* permitted to return a sub-portion of the input rdesc, whose lifetime is managed by the caller.

Package Linux Kernel

Published 2026-04-22

Last modified 2026-04-28

CVSS version 3.1

Patch available

Yes

CVSS 3.1 score

5.5

out of 10

Medium

Attack Vector

Local

Attack Complexity

Low

Privileges Required

Low

User Interaction

None

Scope

Unchanged

Confidentiality

Low

Integrity

None

Availability

High

Vector string

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Weakness type

CWE-401

CVE-2026-31522 is a Memory Leak vulnerability

What is Memory Leak?

The product does not release memory after use, causing gradual resource exhaustion. Learn more on MITRE CWE

Affected versions

Linux kernel versions 5.15.17, 5.16.3, 5.17 and later are affected. Fixed in 5.15.203, 6.1.168, 6.6.131, 6.12.80, 6.18.21, 6.19.11, 7.0 and their respective stable series.

Affected from

≥ 5.15.17 ≥ 5.16.3 ≥ 5.17

Fixed in

✓ 5.15.203 5.15.x ✓ 6.1.168 6.1.x ✓ 6.6.131 6.6.x ✓ 6.12.80 6.12.x ✓ 6.18.21 6.18.x ✓ 6.19.11 6.19.x ✓ 7.0

References

7 total

Kernel Git
https://git.kernel.org/stable/c/136f605e246b4bfe7ac2259471d1ff814aed0084

Patch
Kernel Git
https://git.kernel.org/stable/c/579c4c9857acdc8380fa99803f355f878bd766cb

Patch
Kernel Git
https://git.kernel.org/stable/c/79e5dcc95d9abed6f8203cfd529f4ec71f0e505d

Patch
Kernel Git
https://git.kernel.org/stable/c/7edfe4346b052b708645d0acc0f186425766b785

Patch
Kernel Git
https://git.kernel.org/stable/c/91e8c6e601bdc1ccdf886479b6513c01c7e51c2c

Patch

Showing 5 of 7 references View all on NVD

Details

CVE ID CVE-2026-31522

Severity Medium

CVSS score 5.5 / 10

CVSS version 3.1

Published 2026-04-22

Modified 2026-04-28

KEV No

Patch

Yes

Package linux

Frequently asked questions

What is CVE-2026-31522?

CVE-2026-31522 is a Medium severity Linux kernel vulnerability with a CVSS score of 5.5 out of 10 , classified as a Memory Leak flaw (CWE-401) . It affects Linux kernel versions from 5.15.17 onward and has been patched in 5.15.203, 6.1.168, 6.6.131 and others. CVE-2026-31522 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.
What is the CVSS score for CVE-2026-31522?

CVE-2026-31522 has a CVSS score of 5.5 out of 10, rated Medium severity (CVSS 3.1). The vector string is CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H.
Is there a patch available for CVE-2026-31522?

Yes. CVE-2026-31522 has been patched. Fixed versions include 5.15.203, 6.1.168, 6.6.131 and others. If you are running Linux kernel 5.15.17 or later up to the fix versions, apply the relevant patch for your kernel branch.
Is CVE-2026-31522 actively exploited?

No. CVE-2026-31522 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.