What is CVE-2026-45897?

CVE-2026-45897 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-2026-45897 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

What is the CVSS score for CVE-2026-45897?

CVE-2026-45897 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-2026-45897?

Yes, CVE-2026-45897 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-2026-45897 actively exploited?

CVE-2026-45897 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

CVE-2026-45897

Medium

In the Linux kernel, the following vulnerability has been resolved: netfilter: nft_counter: serialize reset with spinlock Add a global static spinlock to serialize counter fetch+reset operations, preventing concurrent dump-and-reset from underrunning values. The lock is taken before fetching the total so that two parallel resets cannot both read the same counter values and then both subtract them. A global lock is used for simplicity since resets are infrequent. If this becomes a bottleneck, it can be replaced with a per-net lock later.

Package Linux Kernel

Published 2026-05-27

Last modified 2026-06-25

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/0cdc6d5a26f2d1f7f15a43526841b679445c32e2

Patch
Kernel Git
https://git.kernel.org/stable/c/779c60a5190c42689534172f4b49e927c9959e4e

Patch

Details

CVE ID CVE-2026-45897

Severity Medium

CVSS score 5.5 / 10

CVSS version 3.1

Published 2026-05-27

Modified 2026-06-25

KEV No

Patch

Yes

Package linux

Frequently asked questions

What is CVE-2026-45897?

CVE-2026-45897 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-2026-45897 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.
What is the CVSS score for CVE-2026-45897?

CVE-2026-45897 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-2026-45897?

Yes. CVE-2026-45897 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-2026-45897 actively exploited?

No. CVE-2026-45897 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.