What is CVE-2026-31634?

CVE-2026-31634 is a Medium severity Linux kernel vulnerability with a CVSS score of 5.5 out of 10, affecting Linux kernel versions from 2.6.22 onward and patched in 5.10.258, 5.15.203, 6.1.169 and others. CVE-2026-31634 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

What is the CVSS score for CVE-2026-31634?

CVE-2026-31634 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-2026-31634?

Yes, CVE-2026-31634 has been patched. Fixed versions include 5.10.258, 5.15.203, 6.1.169 and others. If you are running Linux kernel 2.6.22 or later up to the fix versions, apply the relevant patch for your kernel branch.

Is CVE-2026-31634 actively exploited?

CVE-2026-31634 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

CVE-2026-31634

Medium

In the Linux kernel, the following vulnerability has been resolved: rxrpc: fix reference count leak in rxrpc_server_keyring() This patch fixes a reference count leak in rxrpc_server_keyring() by checking if rx->securities is already set.

Package Linux Kernel

Published 2026-04-24

Last modified 2026-06-01

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

Affected versions

Linux kernel versions 2.6.22 and later are affected. Fixed in 5.10.258, 5.15.203, 6.1.169, 6.6.135, 6.12.82, 6.18.23, 6.19.13, 7.0 and their respective stable series.

Affected from

≥ 2.6.22

Fixed in

✓ 5.10.258 5.10.x ✓ 5.15.203 5.15.x ✓ 6.1.169 6.1.x ✓ 6.6.135 6.6.x ✓ 6.12.82 6.12.x ✓ 6.18.23 6.18.x ✓ 6.19.13 6.19.x ✓ 7.0

References

The following references provide additional information about CVE-2026-31634 including vendor advisories, patch commits, exploit details, and third-party analysis. Links are sourced from the NIST NVD database.

Kernel patch commit
https://git.kernel.org/stable/c/12de9e0e0b0b7058be7dfb8a5927eb565bc25780
Patch
Kernel patch commit
https://git.kernel.org/stable/c/139c750bf06649097d98b0bc41e2a678b4627e27
Patch
Kernel patch commit
https://git.kernel.org/stable/c/45d9584e51bdd61faf1900f82666d4ea6a85da72
Patch

8 patch commits total View all on NVD

Details

CVE ID CVE-2026-31634

Severity Medium

CVSS score 5.5 / 10

CVSS version 3.1

Published 2026-04-24

Modified 2026-06-01

KEV No

Patch

Yes

Package linux

Frequently asked questions

What is CVE-2026-31634?

CVE-2026-31634 is a Medium severity Linux kernel vulnerability with a CVSS score of 5.5 out of 10 . It affects Linux kernel versions from 2.6.22 onward and has been patched in 5.10.258, 5.15.203, 6.1.169 and others. CVE-2026-31634 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.
What is the CVSS score for CVE-2026-31634?

CVE-2026-31634 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-2026-31634?

Yes — CVE-2026-31634 has been patched. Fixed versions include 5.10.258, 5.15.203, 6.1.169 and others. If you are running Linux kernel 2.6.22 or later up to the fix versions, apply the relevant patch for your kernel branch.
Is CVE-2026-31634 actively exploited?

No — CVE-2026-31634 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.