PT-2025-41067 · Linux+2 · Linux Kernel+2

Published 2023-11-07 · Updated 2025-10-08 · CVE-2023-53623

Positive Technologies (AI Summary)

CVSS v3.1

4.7

Medium

Base vector

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

Name of the Vulnerable Software and Affected Versions Linux kernel versions 5.10.y and later

Description The Linux kernel contains a flaw in the mm/swap component related to a race condition between swapoff and get swap pages when handling swap info struct. Specifically, the si->lock is not consistently held when deleting a swap info structure from the available list, potentially allowing another thread to re-add it. This can lead to memory corruption and, in the worst case, a kernel panic. The issue can be triggered by concurrently running swapon-swapoff operations, such as with the stress-ng-swap tool, or by calling madvise(MADV PAGEOUT) on touched memory blocks. A panic message involving plist check prev next node may be observed when CONFIG PLIST DEBUG is enabled.

Recommendations Versions prior to 5.10.y are not affected.

Exploit

Fix

Race Condition

Weakness Enumeration

CWE-362

Related Identifiers

ALSA-2025_16880

CESA-2024_3138

CVE-2023-53623

RHSA-2023:6583

RHSA-2023_6583

RHSA-2024:3138

RHSA-2024_3138

Affected Products

Centos

Linux Kernel

Red Hat

References · 22

• 🔥 https://github.com/CVEProject/cvelistV5/tree/main/cves/2023/53xxx/CVE-2023-53623.json · Exploit
• https://security-tracker.debian.org/tracker/CVE-2023-53623 · Vendor Advisory
• https://osv.dev/vulnerability/BELL-CVE-2023-53623 · Vendor Advisory
• https://ubuntu.com/security/CVE-2023-53623 · Vendor Advisory
• https://git.kernel.org/stable/c/111a79d9b92f0a679fe300ccd3119ae9741f3d54 · Patch
• https://osv.dev/vulnerability/CVE-2023-53623 · Vendor Advisory
• https://osv.dev/vulnerability/DEBIAN-CVE-2023-53623 · Vendor Advisory
• https://git.kernel.org/stable/c/4bdf1514b4268d29360ba9e43becdd49955bc7ae · Patch
• https://osv.dev/vulnerability/UBUNTU-CVE-2023-53623 · Vendor Advisory
• https://git.kernel.org/stable/c/6fe7d6b992113719e96744d974212df3fcddc76c · Patch
• https://nvd.nist.gov/vuln/detail/CVE-2023-53623 · Security Note
• https://git.kernel.org/stable/c/85cc118ce6f1a627901b6db50c9d01f2ad78cdbf · Patch
• https://git.kernel.org/stable/c/b9927d3a60ca9ed35625470888629c074e687ba0 · Patch
• https://git.kernel.org/stable/c/a55f268abdb74ac5633b75a09fefb58458e9d2a2 · Patch
• https://git.kernel.org/stable/c/ea8c42b3b6d95ced3a4f555f04686d00ef0bb206 · Patch