PT-2025-37646 · Linux+4 · Linux Kernel+4

Published 2024-04-30 · Updated 2026-04-14 · CVE-2023-53204

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 (affected versions not specified)

Description A data-race condition exists in the Linux kernel related to the user->unix inflight variable within the AF UNIX socket family. The user->unix inflight variable is modified under a spin lock (unix gc lock), but is read locklessly by the too many unix fds() function. This can lead to inconsistencies and potential issues when handling a large number of UNIX domain sockets. The issue was identified through Kernel Concurrency Sanitizer (KCSAN) reporting. The functions involved include unix attach fds, unix scm to skb, unix dgram sendmsg, unix seqpacket sendmsg, sock sendmsg nosec, sock sendmsg, sys sendmsg, sys sendmsg, sys sendmsg, do sys sendmsg, se sys sendmsg, and x64 sys sendmsg.

Recommendations At the moment, there is no information about a newer version that contains a fix for this vulnerability.

Exploit

DoS

Race Condition

Weakness Enumeration

CWE-362

Related Identifiers

ALSA-2025_16880

BDU:2026-05871

CVE-2023-53204

RHSA-2024:2394

RHSA-2024_2394

SUSE-SU-2025:03600-1

SUSE-SU-2025:03634-1

SUSE-SU-2025:20851-1

SUSE-SU-2025:20861-1

SUSE-SU-2025:20870-1

SUSE-SU-2025:20898-1

SUSE-SU-2025:3751-1

SUSE-SU-2025:4057-1

SUSE-SU-2025:4132-1

SUSE-SU-2025:4141-1

SUSE-SU-2025:4189-1

Affected Products

Astra Linux

Linux Kernel

Red Hat

Red Os

Suse

References · 1564

• 🔥 https://github.com/CVEProject/cvelistV5/tree/main/cves/2023/53xxx/CVE-2023-53204.json · Exploit
• https://security-tracker.debian.org/tracker/CVE-2023-53204 · Vendor Advisory
• https://git.kernel.org/stable/c/03d133dfbcec9d439729cc64706c7eb6d1663a24 · Patch
• https://ubuntu.com/security/CVE-2023-53204 · Vendor Advisory
• https://git.kernel.org/stable/c/9151ed4b006125cba7c06c79df504340ea4e9386 · Patch
• https://osv.dev/vulnerability/SUSE-SU-2025:20898-1 · Vendor Advisory
• https://git.kernel.org/stable/c/0bc36c0650b21df36fbec8136add83936eaf0607 · Patch
• https://osv.dev/vulnerability/SUSE-SU-2025:20861-1 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2023-53204 · Security Note
• https://osv.dev/vulnerability/CVE-2023-53204 · Vendor Advisory
• https://osv.dev/vulnerability/DEBIAN-CVE-2023-53204 · Vendor Advisory
• https://osv.dev/vulnerability/SUSE-SU-2025:4141-1 · Vendor Advisory
• https://git.kernel.org/stable/c/ac92f239a079678a035c0faad9089354a874aede · Patch
• https://bdu.fstec.ru/vul/2026-05871 · Security Note
• https://osv.dev/vulnerability/SUSE-SU-2025:03600-1 · Vendor Advisory