PT-2025-40754 · Linux+4 · Linux Kernel+4

Published 2025-09-29 · Updated 2025-12-04 · CVE-2023-53591

Positive Technologies (AI Summary)

CVSS v3.1

5.5

Medium

Base vector

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

Name of the Vulnerable Software and Affected Versions Linux kernel versions prior to 6.3.0-rc3+

Description The Linux kernel contained a deadlock issue within the net/mlx5e module, specifically in the tc route query code. The issue stemmed from an ABBA deadlock occurring when peer flows were created while holding the devcom read-write semaphore. The code was refactored to use RCU (Read-Copy-Update) for lockless execution, involving RCUifying the devcom data pointer and wrapping usages of the paired boolean in READ ONCE and WRITE ONCE macros. The mlx5e tc query route vport function was updated to utilize the new mlx5 devcom get peer data rcu API to resolve the deadlock. The deadlock was detected during testing and reported with a warning message indicating a circular locking dependency.

Recommendations Update to a version later than 6.3.0-rc3+ to address this issue.

Exploit

Fix

Improper Locking

Weakness Enumeration

CWE-667

Related Identifiers

ALSA-2025_16880

CVE-2023-53591

RHSA-2023:6583

RHSA-2023:7077

SUSE-SU-2025:4149-1

SUSE-SU-2025:4320-1

Affected Products

Centos

Linux Kernel

Red Hat

Suse

Mlx5E

References · 438

• 🔥 https://github.com/CVEProject/cvelistV5/tree/main/cves/2023/53xxx/CVE-2023-53591.json · Exploit
• https://osv.dev/vulnerability/SUSE-SU-2025:4149-1 · Vendor Advisory
• https://cve.org/CVERecord?id=CVE-2023-53591 · Security Note
• https://osv.dev/vulnerability/CVE-2023-53591 · Vendor Advisory
• https://git.kernel.org/stable/c/69966bce28da6aadccfd968b75d128a79da32d17 · Patch
• https://ubuntu.com/security/CVE-2023-53591 · Vendor Advisory
• https://osv.dev/vulnerability/DEBIAN-CVE-2023-53591 · Vendor Advisory
• https://osv.dev/vulnerability/BELL-CVE-2023-53591 · Vendor Advisory
• https://git.kernel.org/stable/c/362063df6ceec80b0b6798b61ae03504dcc125a5 · Patch
• https://nvd.nist.gov/vuln/detail/CVE-2023-53591 · Security Note
• https://git.kernel.org/stable/c/691c041bf20899fc13c793f92ba61ab660fa3a30 · Patch
• https://security-tracker.debian.org/tracker/CVE-2023-53591 · Vendor Advisory
• https://git.kernel.org/stable/c/a7236e420a7d8082b1df4b3e05c739dd2642a662 · Patch
• https://osv.dev/vulnerability/UBUNTU-CVE-2023-53591 · Vendor Advisory
• https://osv.dev/vulnerability/SUSE-SU-2025:4320-1 · Vendor Advisory