What is CVE-2026-52905?

CVE-2026-52905 is a Medium severity Linux kernel vulnerability with a CVSS score of 5.5 out of 10, affecting Linux kernel versions from 6.18 onward and patched in 6.18.30, 7.0.4 and 7.1. CVE-2026-52905 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

What is the CVSS score for CVE-2026-52905?

CVE-2026-52905 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-2026-52905?

Yes, CVE-2026-52905 has been patched. Fixed versions include 6.18.30, 7.0.4 and 7.1. If you are running Linux kernel 6.18 or later up to the fix versions, apply the relevant patch for your kernel branch.

Is CVE-2026-52905 actively exploited?

CVE-2026-52905 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

CVE-2026-52905

Medium

In the Linux kernel, the following vulnerability has been resolved: mm/damon/core: disallow non-power of two min_region_sz on damon_start() Commit d8f867fa0825 ("mm/damon: add damon_ctx->min_sz_region") introduced a bug that allows unaligned DAMON region address ranges. Commit c80f46ac228b ("mm/damon/core: disallow non-power of two min_region_sz") fixed it, but only for damon_commit_ctx() use case. Still, DAMON sysfs interface can emit non-power of two min_region_sz via damon_start(). Fix the path by adding the is_power_of_2() check on damon_start(). The issue was discovered by sashiko [1].

Package Linux Kernel

Published 2026-06-09

Last modified 2026-07-23

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

Weakness type

CWE-1284

CVE-2026-52905 is classified as CWE-1284

See CWE-1284 on MITRE CWE for full details on this weakness type.

Affected versions

Linux kernel versions 6.18 and later are affected. Fixed in 6.18.30, 7.0.4, 7.1 and their respective stable series.

Affected from

≥ 6.18

Fixed in

✓ 6.18.30 6.18.x ✓ 7.0.4 7.0.x ✓ 7.1

References

3 total

Kernel Git
https://git.kernel.org/stable/c/1de2db19a6028abe7d905875922faef5b873de67

Patch
Kernel Git
https://git.kernel.org/stable/c/89b6226b6c2a4add3939f361653a47c212d6ab75

Patch
Kernel Git
https://git.kernel.org/stable/c/95093e5cb4c5b50a5b1a4b79f2942b62744bd66a

Patch

Details

CVE ID CVE-2026-52905

Severity Medium

CVSS score 5.5 / 10

CVSS version 3.1

Published 2026-06-09

Modified 2026-07-23

KEV No

Patch

Yes

Package linux

Frequently asked questions

What is CVE-2026-52905?

CVE-2026-52905 is a Medium severity Linux kernel vulnerability with a CVSS score of 5.5 out of 10 . It affects Linux kernel versions from 6.18 onward and has been patched in 6.18.30, 7.0.4 and 7.1. CVE-2026-52905 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.
What is the CVSS score for CVE-2026-52905?

CVE-2026-52905 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-2026-52905?

Yes. CVE-2026-52905 has been patched. Fixed versions include 6.18.30, 7.0.4 and 7.1. If you are running Linux kernel 6.18 or later up to the fix versions, apply the relevant patch for your kernel branch.
Is CVE-2026-52905 actively exploited?

No. CVE-2026-52905 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.