What is CVE-2023-52926?

CVE-2023-52926 is a High severity Linux kernel vulnerability with a CVSS score of 7.8 out of 10, classified as a Use After Free flaw (CWE-416), affecting Linux kernel versions from 5.1 onward and patched in 6.1.122, 6.6.68 and 6.7. CVE-2023-52926 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

What is the CVSS score for CVE-2023-52926?

CVE-2023-52926 has a CVSS score of 7.8 out of 10, rated High severity. The vector string is CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.

Is there a patch available for CVE-2023-52926?

Yes, CVE-2023-52926 has been patched. Fixed versions include 6.1.122, 6.6.68 and 6.7. If you are running Linux kernel 5.1 or later up to the fix versions, apply the relevant patch for your kernel branch.

Is CVE-2023-52926 actively exploited?

CVE-2023-52926 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

What is Use After Free (CWE-416)?

The product references memory after it has been freed, which may cause it to crash, use unexpected values, or execute code. See MITRE CWE for full details: https://cwe.mitre.org/data/definitions/416.html

CVE-2023-52926

High

In the Linux kernel, the following vulnerability has been resolved: IORING_OP_READ did not correctly consume the provided buffer list when read i/o returned < 0 (except for -EAGAIN and -EIOCBQUEUED return). This can lead to a potential use-after-free when the completion via io_rw_done runs at separate context.

Package Linux Kernel

Published 2025-02-24

Last modified 2025-11-03

CVSS version 3.1

Patch available

Yes

CVSS 3.1 score

7.8

out of 10

High

Attack Vector

Local

Attack Complexity

Low

Privileges Required

Low

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

Vector string

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Weakness type

CWE-416

CVE-2023-52926 is a Use After Free vulnerability

What is Use After Free?

The product references memory after it has been freed, which may cause it to crash, use unexpected values, or execute code. Learn more on MITRE CWE

Affected versions

Linux kernel versions 5.1 and later are affected. Fixed in 6.1.122, 6.6.68, 6.7 and their respective stable series.

Affected from

≥ 5.1

Fixed in

✓ 6.1.122 6.1.x ✓ 6.6.68 6.6.x ✓ 6.7

References

The following references provide additional information about CVE-2023-52926 including vendor advisories, patch commits, exploit details, and third-party analysis. Links are sourced from the NIST NVD database.

Debian Security
https://lists.debian.org/debian-lts-announce/2025/03/msg00001.html
Kernel patch commit
https://git.kernel.org/stable/c/6c27fc6a783c8a77c756dd5461b15e465020d075
Patch
Kernel patch commit
https://git.kernel.org/stable/c/72060434a14caea20925e492310d6e680e3f9007
Patch
Kernel patch commit
https://git.kernel.org/stable/c/a08d195b586a217d76b42062f88f375a3eedda4d
Patch

Details

CVE ID CVE-2023-52926

Severity High

CVSS score 7.8 / 10

CVSS version 3.1

Published 2025-02-24

Modified 2025-11-03

KEV No

Patch

Yes

Package linux

Frequently asked questions

What is CVE-2023-52926?

CVE-2023-52926 is a High severity Linux kernel vulnerability with a CVSS score of 7.8 out of 10 , classified as an Use After Free flaw (CWE-416) . It affects Linux kernel versions from 5.1 onward and has been patched in 6.1.122, 6.6.68 and 6.7. CVE-2023-52926 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.
What is the CVSS score for CVE-2023-52926?

CVE-2023-52926 has a CVSS score of 7.8 out of 10, rated High severity (CVSS 3.1). The vector string is CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.
Is there a patch available for CVE-2023-52926?

Yes — CVE-2023-52926 has been patched. Fixed versions include 6.1.122, 6.6.68 and 6.7. If you are running Linux kernel 5.1 or later up to the fix versions, apply the relevant patch for your kernel branch.
Is CVE-2023-52926 actively exploited?

No — CVE-2023-52926 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.
What is Use After Free (CWE-416)?

The product references memory after it has been freed, which may cause it to crash, use unexpected values, or execute code. View CWE-416 on MITRE CWE →