What is CVE-2026-45901?

CVE-2026-45901 is a Medium severity Linux kernel vulnerability with a CVSS score of 5.5 out of 10, affecting Linux kernel versions from 6.1.107 onward and patched in 6.19.4 and 7.0. CVE-2026-45901 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

What is the CVSS score for CVE-2026-45901?

CVE-2026-45901 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-2026-45901?

Yes, CVE-2026-45901 has been patched. Fixed versions include 6.19.4 and 7.0. If you are running Linux kernel 6.1.107 or later up to the fix versions, apply the relevant patch for your kernel branch.

Is CVE-2026-45901 actively exploited?

CVE-2026-45901 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

CVE-2026-45901

Medium

In the Linux kernel, the following vulnerability has been resolved: netfilter: nf_tables: revert commit_mutex usage in reset path It causes circular lock dependency between commit_mutex, nfnl_subsys_ipset and nlk_cb_mutex when nft reset, ipset list, and iptables-nft with '-m set' rule run at the same time. Previous patches made it safe to run individual reset handlers concurrently so commit_mutex is no longer required to prevent this.

Package Linux Kernel

Published 2026-05-27

Last modified 2026-06-24

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 6.1.107, 6.6.48, 6.7 and later are affected. Fixed in 6.19.4, 7.0 and their respective stable series.

Affected from

≥ 6.1.107 ≥ 6.6.48 ≥ 6.7

Fixed in

✓ 6.19.4 6.19.x ✓ 7.0

References

2 total

Kernel Git
https://git.kernel.org/stable/c/7f261bb906bf527c4a6e2a646e2d5f3679f2a8bc

Patch
Kernel Git
https://git.kernel.org/stable/c/ee3978b6a0dcd4215cb7cedcba705a12174786a7

Patch

Details

CVE ID CVE-2026-45901

Severity Medium

CVSS score 5.5 / 10

CVSS version 3.1

Published 2026-05-27

Modified 2026-06-24

KEV No

Patch

Yes

Package linux

Frequently asked questions

What is CVE-2026-45901?

CVE-2026-45901 is a Medium severity Linux kernel vulnerability with a CVSS score of 5.5 out of 10 . It affects Linux kernel versions from 6.1.107 onward and has been patched in 6.19.4 and 7.0. CVE-2026-45901 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.
What is the CVSS score for CVE-2026-45901?

CVE-2026-45901 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-2026-45901?

Yes. CVE-2026-45901 has been patched. Fixed versions include 6.19.4 and 7.0. If you are running Linux kernel 6.1.107 or later up to the fix versions, apply the relevant patch for your kernel branch.
Is CVE-2026-45901 actively exploited?

No. CVE-2026-45901 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.