What is CVE-2026-23083?

CVE-2026-23083 is a High severity Linux kernel vulnerability with a CVSS score of 7.8 out of 10, affecting Linux kernel versions from 3.18 onward and patched in 5.10.249, 5.15.199, 6.1.162 and others. CVE-2026-23083 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

What is the CVSS score for CVE-2026-23083?

CVE-2026-23083 has a CVSS score of 7.8 out of 10, rated High severity. The vector string is CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.

Is there a patch available for CVE-2026-23083?

Yes, CVE-2026-23083 has been patched. Fixed versions include 5.10.249, 5.15.199, 6.1.162 and others. If you are running Linux kernel 3.18 or later up to the fix versions, apply the relevant patch for your kernel branch.

Is CVE-2026-23083 actively exploited?

CVE-2026-23083 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

CVE-2026-23083

High

In the Linux kernel, the following vulnerability has been resolved: fou: Don't allow 0 for FOU_ATTR_IPPROTO. fou_udp_recv() has the same problem mentioned in the previous patch. If FOU_ATTR_IPPROTO is set to 0, skb is not freed by fou_udp_recv() nor "resubmit"-ted in ip_protocol_deliver_rcu(). Let's forbid 0 for FOU_ATTR_IPPROTO.

Package Linux Kernel

Published 2026-02-04

Last modified 2026-03-18

CVSS version 3.1

Patch available

Yes

CVSS 3.1 score

7.8

out of 10

High

Attack Vector

Local

Attack Complexity

Low

Privileges Required

Low

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

Vector string

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

Affected versions

Linux kernel versions 3.18 and later are affected. Fixed in 5.10.249, 5.15.199, 6.1.162, 6.6.122, 6.12.68, 6.18.8, 6.19 and their respective stable series.

Affected from

≥ 3.18

Fixed in

✓ 5.10.249 5.10.x ✓ 5.15.199 5.15.x ✓ 6.1.162 6.1.x ✓ 6.6.122 6.6.x ✓ 6.12.68 6.12.x ✓ 6.18.8 6.18.x ✓ 6.19

References

The following references provide additional information about CVE-2026-23083 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/1cc98b8887cabb1808d2f4a37cd10a7be7574771
Patch
Kernel patch commit
https://git.kernel.org/stable/c/611ef4bd9c73d9e6d87bed57a635ff1fdd8c91ea
Patch
Kernel patch commit
https://git.kernel.org/stable/c/6e983789b7588ee59cbf303583546c043bad8e19
Patch

7 patch commits total View all on NVD

Details

CVE ID CVE-2026-23083

Severity High

CVSS score 7.8 / 10

CVSS version 3.1

Published 2026-02-04

Modified 2026-03-18

KEV No

Patch

Yes

Package linux

Frequently asked questions

What is CVE-2026-23083?

CVE-2026-23083 is a High severity Linux kernel vulnerability with a CVSS score of 7.8 out of 10 . It affects Linux kernel versions from 3.18 onward and has been patched in 5.10.249, 5.15.199, 6.1.162 and others. CVE-2026-23083 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.
What is the CVSS score for CVE-2026-23083?

CVE-2026-23083 has a CVSS score of 7.8 out of 10, rated High severity (CVSS 3.1). The vector string is CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.
Is there a patch available for CVE-2026-23083?

Yes — CVE-2026-23083 has been patched. Fixed versions include 5.10.249, 5.15.199, 6.1.162 and others. If you are running Linux kernel 3.18 or later up to the fix versions, apply the relevant patch for your kernel branch.
Is CVE-2026-23083 actively exploited?

No — CVE-2026-23083 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.