What is CVE-2026-45974?

CVE-2026-45974 is a Medium severity Linux kernel vulnerability with a CVSS score of 5.5 out of 10, affecting Linux kernel versions from 5.9.7 onward and patched in 5.10.252, 5.15.202, 6.1.165 and others. CVE-2026-45974 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

What is the CVSS score for CVE-2026-45974?

CVE-2026-45974 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-2026-45974?

Yes, CVE-2026-45974 has been patched. Fixed versions include 5.10.252, 5.15.202, 6.1.165 and others. If you are running Linux kernel 5.9.7 or later up to the fix versions, apply the relevant patch for your kernel branch.

Is CVE-2026-45974 actively exploited?

CVE-2026-45974 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

CVE-2026-45974

Medium

In the Linux kernel, the following vulnerability has been resolved: btrfs: fix invalid leaf access in btrfs_quota_enable() if ref key not found If btrfs_search_slot_for_read() returns 1, it means we did not find any key greater than or equals to the key we asked for, meaning we have reached the end of the tree and therefore the path is not valid. If this happens we need to break out of the loop and stop, instead of continuing and accessing an invalid path.

Package Linux Kernel

Published 2026-05-27

Last modified 2026-06-16

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 5.9.7, 5.10 and later are affected. Fixed in 5.10.252, 5.15.202, 6.1.165, 6.6.128, 6.12.75, 6.18.14, 6.19.4, 7.0 and their respective stable series.

Affected from

≥ 5.9.7 ≥ 5.10

Fixed in

✓ 5.10.252 5.10.x ✓ 5.15.202 5.15.x ✓ 6.1.165 6.1.x ✓ 6.6.128 6.6.x ✓ 6.12.75 6.12.x ✓ 6.18.14 6.18.x ✓ 6.19.4 6.19.x ✓ 7.0

References

8 total

Kernel Git
https://git.kernel.org/stable/c/023545e272f369d487e6a986c1e321c6e04be1da

Patch
Kernel Git
https://git.kernel.org/stable/c/0761447f6f51e1c7997960d8e6559337deed6729

Patch
Kernel Git
https://git.kernel.org/stable/c/1ee1d006c9fe4d6be5527ab1c84216b80cccbe40

Patch
Kernel Git
https://git.kernel.org/stable/c/b2bd557b75b760e4b9d209112bda19314bd64558

Patch
Kernel Git
https://git.kernel.org/stable/c/b5b8ade9da452086e78f5d519b90d3769e354853

Patch

Showing 5 of 8 references View all on NVD

Details

CVE ID CVE-2026-45974

Severity Medium

CVSS score 5.5 / 10

CVSS version 3.1

Published 2026-05-27

Modified 2026-06-16

KEV No

Patch

Yes

Package linux

Frequently asked questions

What is CVE-2026-45974?

CVE-2026-45974 is a Medium severity Linux kernel vulnerability with a CVSS score of 5.5 out of 10 . It affects Linux kernel versions from 5.9.7 onward and has been patched in 5.10.252, 5.15.202, 6.1.165 and others. CVE-2026-45974 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.
What is the CVSS score for CVE-2026-45974?

CVE-2026-45974 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-2026-45974?

Yes. CVE-2026-45974 has been patched. Fixed versions include 5.10.252, 5.15.202, 6.1.165 and others. If you are running Linux kernel 5.9.7 or later up to the fix versions, apply the relevant patch for your kernel branch.
Is CVE-2026-45974 actively exploited?

No. CVE-2026-45974 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.