What is CVE-2023-53501?

CVE-2023-53501 is a Medium severity Linux kernel vulnerability with a CVSS score of 4.7 out of 10, affecting Linux kernel versions from 5.15 onward and patched in 5.15.132, 6.1.53, 6.4.16 and others. CVE-2023-53501 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

What is the CVSS score for CVE-2023-53501?

CVE-2023-53501 has a CVSS score of 4.7 out of 10, rated Medium severity. The vector string is CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H.

Is there a patch available for CVE-2023-53501?

Yes, CVE-2023-53501 has been patched. Fixed versions include 5.15.132, 6.1.53, 6.4.16 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-2023-53501 actively exploited?

CVE-2023-53501 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

CVE-2023-53501

Medium

In the Linux kernel, the following vulnerability has been resolved: iommu/amd/iommu_v2: Fix pasid_state refcount dec hit 0 warning on pasid unbind When unbinding pasid - a race condition exists vs outstanding page faults. To prevent this, the pasid_state object contains a refcount. * set to 1 on pasid bind * incremented on each ppr notification start * decremented on each ppr notification done * decremented on pasid unbind Since refcount_dec assumes that refcount will never reach 0: the current implementation causes the following to be invoked on pasid unbind: REFCOUNT_WARN("decrement hit 0; leaking memory") Fix this issue by changing refcount_dec to refcount_dec_and_test to explicitly handle refcount=1.

Package Linux Kernel

Published 2025-10-01

Last modified 2026-01-23

CVSS version 3.1

Patch available

Yes

CVSS 3.1 score

4.7

out of 10

Medium

Attack Vector

Local

Attack Complexity

High

Privileges Required

Low

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

None

Availability

High

Vector string

CVSS:3.1/AV:L/AC:H/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 5.15.132, 6.1.53, 6.4.16, 6.5.3, 6.6 and their respective stable series.

Affected from

≥ 5.15

Fixed in

✓ 5.15.132 5.15.x ✓ 6.1.53 6.1.x ✓ 6.4.16 6.4.x ✓ 6.5.3 6.5.x ✓ 6.6

References

The following references provide additional information about CVE-2023-53501 including vendor advisories, patch commits, exploit details, and third-party analysis. Links are sourced from the NIST NVD database.

Kernel patch commit
https://git.kernel.org/stable/c/13ed255248dfbbb7f23f9170c7a537fb9ca22c73
Patch
Kernel patch commit
https://git.kernel.org/stable/c/534103bcd52ca9c1fecbc70e717b4a538dc4ded8
Patch
Kernel patch commit
https://git.kernel.org/stable/c/98d86bf32187db27946ca817c2467a5f2f7aa02f
Patch

5 patch commits total View all on NVD

Details

CVE ID CVE-2023-53501

Severity Medium

CVSS score 4.7 / 10

CVSS version 3.1

Published 2025-10-01

Modified 2026-01-23

KEV No

Patch

Yes

Package linux

Frequently asked questions

What is CVE-2023-53501?

CVE-2023-53501 is a Medium severity Linux kernel vulnerability with a CVSS score of 4.7 out of 10 . It affects Linux kernel versions from 5.15 onward and has been patched in 5.15.132, 6.1.53, 6.4.16 and others. CVE-2023-53501 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.
What is the CVSS score for CVE-2023-53501?

CVE-2023-53501 has a CVSS score of 4.7 out of 10, rated Medium severity (CVSS 3.1). The vector string is CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H.
Is there a patch available for CVE-2023-53501?

Yes — CVE-2023-53501 has been patched. Fixed versions include 5.15.132, 6.1.53, 6.4.16 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-2023-53501 actively exploited?

No — CVE-2023-53501 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.