What is CVE-2026-53327?

CVE-2026-53327 is a Medium severity Linux kernel vulnerability with a CVSS score of 5.5 out of 10, affecting Linux kernel versions from 5.15 onward and patched in 6.1.177, 6.6.144, 6.12.95 and others. CVE-2026-53327 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

What is the CVSS score for CVE-2026-53327?

CVE-2026-53327 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-2026-53327?

Yes, CVE-2026-53327 has been patched. Fixed versions include 6.1.177, 6.6.144, 6.12.95 and others. If you are running Linux kernel 5.15 or later up to the fix versions, apply the relevant patch for your kernel branch.

Is CVE-2026-53327 actively exploited?

CVE-2026-53327 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

CVE-2026-53327

Medium

In the Linux kernel, the following vulnerability has been resolved: debugobjects: Do not fill_pool() if pi_blocked_on On RT enabled kernels, fill_pool() ends up calling rtlock_lock(), which asserts if current::pi_blocked_on is set, because a task can obviously only block on one lock as otherwise the priority inheritenace chain gets corrupted. Prevent this by expanding the conditional to take current::pi_blocked_on into account.

Package Linux Kernel

Published 2026-07-01

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

Affected versions

Linux kernel versions 5.15 and later are affected. Fixed in 6.1.177, 6.6.144, 6.12.95, 6.18.37, 7.0.13, 7.1 and their respective stable series.

Affected from

≥ 5.15

Fixed in

✓ 6.1.177 6.1.x ✓ 6.6.144 6.6.x ✓ 6.12.95 6.12.x ✓ 6.18.37 6.18.x ✓ 7.0.13 7.0.x ✓ 7.1

References

6 total

Kernel Git
https://git.kernel.org/stable/c/33bee10644f8fff3b1a0187ad5ad34513e5e8e72

Patch
Kernel Git
https://git.kernel.org/stable/c/3a408cae608d9c075dd3a9e5cfc03b3cb0726863

Patch
Kernel Git
https://git.kernel.org/stable/c/3f6a3b24ab7b9d51f6f4778254bef0e5847beb55

Patch
Kernel Git
https://git.kernel.org/stable/c/5f41161059fd0f1bbf18c90f3180e38cc45a14eb

Patch
Kernel Git
https://git.kernel.org/stable/c/8a680d54f1adf3e3aa815578684556716fda6f0c

Patch

Showing 5 of 6 references View all on NVD

Details

CVE ID CVE-2026-53327

Severity Medium

CVSS score 5.5 / 10

CVSS version 3.1

Published 2026-07-01

Modified 2026-07-23

KEV No

Patch

Yes

Package linux

Frequently asked questions

What is CVE-2026-53327?

CVE-2026-53327 is a Medium severity Linux kernel vulnerability with a CVSS score of 5.5 out of 10 . It affects Linux kernel versions from 5.15 onward and has been patched in 6.1.177, 6.6.144, 6.12.95 and others. CVE-2026-53327 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.
What is the CVSS score for CVE-2026-53327?

CVE-2026-53327 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-2026-53327?

Yes. CVE-2026-53327 has been patched. Fixed versions include 6.1.177, 6.6.144, 6.12.95 and others. If you are running Linux kernel 5.15 or later up to the fix versions, apply the relevant patch for your kernel branch.
Is CVE-2026-53327 actively exploited?

No. CVE-2026-53327 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.