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CVE-2023-52629

HIGH
Published 2024-03-29T09:13:45.848Z
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CVSS Score

V3.1
8.4
/10
CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Base Score Metrics
Exploitability: N/A Impact: N/A

EPSS Score

v2025.03.14
0.000
probability
of exploitation in the wild

There is a 0.0% chance that this vulnerability will be exploited in the wild within the next 30 days.

Updated: 2025-06-25
Exploit Probability
Percentile: 0.022
Higher than 2.2% of all CVEs

Attack Vector Metrics

Attack Vector
LOCAL
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED

Impact Metrics

Confidentiality
HIGH
Integrity
HIGH
Availability
HIGH

Description

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.

Available Exploits

No exploits available for this CVE.

Related News

No news articles found for this CVE.

Affected Products

Linux

Linux

Affected Versions:

9f5e8eee5cfe1328660c71812d87c2a67bda389f 9f5e8eee5cfe1328660c71812d87c2a67bda389f
Linux

Linux

Affected Versions:

2.6.20 0 6.5.4 6.6
linux

linux_kernel

Affected Versions:

9f5e8eee5cfe 9f5e8eee5cfe 2.6.20 0 6.54 0

GitHub Security Advisories

Community-driven vulnerability intelligence from GitHub

⚠ Unreviewed HIGH

GHSA-384v-9gx5-rmx4

Advisory Details

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.

CVSS Scoring

CVSS Score

7.5

CVSS Vector

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

References

ADVISORY https://nvd.nist.gov/vuln/detail/CVE-2023-52629
WEB https://git.kernel.org/stable/c/246f80a0b17f8f582b2c0996db02998239057c65
WEB https://git.kernel.org/stable/c/610dbd8ac271aa36080aac50b928d700ee3fe4de

Advisory provided by GitHub Security Advisory Database. Published: March 29, 2024, Modified: August 1, 2024

References

https://git.kernel.org/stable/c/610dbd8ac271aa36080aac50b928d700ee3fe4de
https://git.kernel.org/stable/c/246f80a0b17f8f582b2c0996db02998239057c65
Published: 2024-03-29T09:13:45.848Z
Last Modified: 2025-05-04T07:40:19.394Z
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