What is CVE-2026-31692?

CVE-2026-31692 is a Medium severity Linux kernel vulnerability with a CVSS score of 5.5 out of 10, affecting Linux kernel versions from 2.6.33 onward and patched in 6.18.24, 6.19.14 and 7.0. CVE-2026-31692 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

What is the CVSS score for CVE-2026-31692?

CVE-2026-31692 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-2026-31692?

Yes, CVE-2026-31692 has been patched. Fixed versions include 6.18.24, 6.19.14 and 7.0. If you are running Linux kernel 2.6.33 or later up to the fix versions, apply the relevant patch for your kernel branch.

Is CVE-2026-31692 actively exploited?

CVE-2026-31692 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

CVE-2026-31692

Medium

In the Linux kernel, the following vulnerability has been resolved: rtnetlink: add missing netlink_ns_capable() check for peer netns rtnl_newlink() lacks a CAP_NET_ADMIN capability check on the peer network namespace when creating paired devices (veth, vxcan, netkit). This allows an unprivileged user with a user namespace to create interfaces in arbitrary network namespaces, including init_net. Add a netlink_ns_capable() check for CAP_NET_ADMIN in the peer namespace before allowing device creation to proceed.

Package Linux Kernel

Published 2026-04-30

Last modified 2026-05-06

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 2.6.33 and later are affected. Fixed in 6.18.24, 6.19.14, 7.0 and their respective stable series.

Affected from

≥ 2.6.33

Fixed in

✓ 6.18.24 6.18.x ✓ 6.19.14 6.19.x ✓ 7.0

References

The following references provide additional information about CVE-2026-31692 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/0975b64ffb34560042090a5986c3a02e6c80f36f
Patch
Kernel patch commit
https://git.kernel.org/stable/c/7b735ef81286007794a227ce2539419479c02a5f
Patch
Kernel patch commit
https://git.kernel.org/stable/c/d04cc16d3624218a5458b2b664ae431f1b3b334d
Patch

Details

CVE ID CVE-2026-31692

Severity Medium

CVSS score 5.5 / 10

CVSS version 3.1

Published 2026-04-30

Modified 2026-05-06

KEV No

Patch

Yes

Package linux

Frequently asked questions

What is CVE-2026-31692?

CVE-2026-31692 is a Medium severity Linux kernel vulnerability with a CVSS score of 5.5 out of 10 . It affects Linux kernel versions from 2.6.33 onward and has been patched in 6.18.24, 6.19.14 and 7.0. CVE-2026-31692 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.
What is the CVSS score for CVE-2026-31692?

CVE-2026-31692 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-2026-31692?

Yes — CVE-2026-31692 has been patched. Fixed versions include 6.18.24, 6.19.14 and 7.0. If you are running Linux kernel 2.6.33 or later up to the fix versions, apply the relevant patch for your kernel branch.
Is CVE-2026-31692 actively exploited?

No — CVE-2026-31692 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.