What is CVE-2023-52629?

CVE-2023-52629 is a High severity Linux kernel vulnerability with a CVSS score of 8.4 out of 10, classified as a Use After Free flaw (CWE-416), affecting Linux kernel versions from 2.6.20 onward and patched in 6.5.4 and 6.6. CVE-2023-52629 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

What is the CVSS score for CVE-2023-52629?

CVE-2023-52629 has a CVSS score of 8.4 out of 10, rated High severity. The vector string is CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

Is there a patch available for CVE-2023-52629?

Yes, CVE-2023-52629 has been patched. Fixed versions include 6.5.4 and 6.6. If you are running Linux kernel 2.6.20 or later up to the fix versions, apply the relevant patch for your kernel branch.

Is CVE-2023-52629 actively exploited?

CVE-2023-52629 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-2023-52629

High

In the Linux kernel, the following vulnerability has been resolved: sh: push-switch: Reorder cleanup operations to avoid use-after-free bug The original code puts flush_work() before timer_shutdown_sync() in switch_drv_remove(). Although we use flush_work() to stop the worker, it could be rescheduled in switch_timer(). As a result, a use-after-free bug can occur. The details are shown below: (cpu 0) | (cpu 1) switch_drv_remove() | flush_work() | ... | switch_timer // timer | schedule_work(&psw->work) timer_shutdown_sync() | ... | switch_work_handler // worker kfree(psw) // free | | psw->state = 0 // use This patch puts timer_shutdown_sync() before flush_work() to mitigate the bugs. As a result, the worker and timer will be stopped safely before the deallocate operations.

Package Linux Kernel

Published 2024-03-29

Last modified 2025-04-08

CVSS version 3.1

Patch available

Yes

CVSS 3.1 score

8.4

out of 10

High

Attack Vector

Local

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

Vector string

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

Weakness type

CWE-416

CVE-2023-52629 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 2.6.20 and later are affected. Fixed in 6.5.4, 6.6 and their respective stable series.

Affected from

≥ 2.6.20

Fixed in

✓ 6.5.4 6.5.x ✓ 6.6

References

2 total

Kernel Git
https://git.kernel.org/stable/c/246f80a0b17f8f582b2c0996db02998239057c65

Patch
Kernel Git
https://git.kernel.org/stable/c/610dbd8ac271aa36080aac50b928d700ee3fe4de

Patch

Details

CVE ID CVE-2023-52629

Severity High

CVSS score 8.4 / 10

CVSS version 3.1

Published 2024-03-29

Modified 2025-04-08

KEV No

Patch

Yes

Package linux

Frequently asked questions

What is CVE-2023-52629?

CVE-2023-52629 is a High severity Linux kernel vulnerability with a CVSS score of 8.4 out of 10 , classified as an Use After Free flaw (CWE-416) . It affects Linux kernel versions from 2.6.20 onward and has been patched in 6.5.4 and 6.6. CVE-2023-52629 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.
What is the CVSS score for CVE-2023-52629?

CVE-2023-52629 has a CVSS score of 8.4 out of 10, rated High severity (CVSS 3.1). The vector string is CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.
Is there a patch available for CVE-2023-52629?

Yes. CVE-2023-52629 has been patched. Fixed versions include 6.5.4 and 6.6. If you are running Linux kernel 2.6.20 or later up to the fix versions, apply the relevant patch for your kernel branch.
Is CVE-2023-52629 actively exploited?

No. CVE-2023-52629 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.