PT-2025-49722 · Linux+1 · Linux Kernel+1

CVE-2023-53831 · Published 2023-08-30 · Updated 2026-07-01

Positive Technologies (AI Summary)

CVSS v2.0

6.0

Medium

Base vector

AV:L/AC:H/Au:S/C:C/I:C/A:C

Name of the Vulnerable Software and Affected Versions Linux kernel versions prior to 6.1.40-syzkaller

Description The Linux kernel contains an issue where the sk family is read only once in the sk mc loop() function. This was discovered by syzbot while testing with IPV6 ADDRFORM. The issue occurs within the networking subsystem and may lead to unexpected behavior.

Recommendations Update to a version newer than 6.1.40-syzkaller.

Exploit

Fix

Improper Resource Release

Weakness Enumeration

CWE-404

CWE-820

Related Identifiers

BDU:2026-10317

CVE-2023-53831

SUSE-SU-2026:0278-1

SUSE-SU-2026:0281-1

SUSE-SU-2026:0293-1

SUSE-SU-2026:0315-1

SUSE-SU-2026:20477-1

SUSE-SU-2026:20498-1

SUSE-SU-2026:20845-1

SUSE-SU-2026:20876-1

Affected Products

Linux Kernel

Red Os

References · 1473

• 🔥 https://github.com/CVEProject/cvelistV5/tree/main/cves/2023/53xxx/CVE-2023-53831.json · Exploit
• https://security-tracker.debian.org/tracker/CVE-2023-53831 · Vendor Advisory
• https://cve.org/CVERecord?id=CVE-2023-53831 · Security Note
• https://osv.dev/vulnerability/SUSE-SU-2026:20477-1 · Vendor Advisory
• https://osv.dev/vulnerability/SUSE-SU-2026:0293-1 · Vendor Advisory
• https://osv.dev/vulnerability/BELL-CVE-2023-53831 · Vendor Advisory
• https://osv.dev/vulnerability/CVE-2023-53831 · Vendor Advisory
• https://osv.dev/vulnerability/SUSE-SU-2026:20845-1 · Vendor Advisory
• https://osv.dev/vulnerability/UBUNTU-CVE-2023-53831 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2023-53831 · Security Note
• https://ubuntu.com/security/CVE-2023-53831 · Vendor Advisory
• https://osv.dev/vulnerability/SUSE-SU-2026:20876-1 · Vendor Advisory
• https://osv.dev/vulnerability/DEBIAN-CVE-2023-53831 · Vendor Advisory
• https://bdu.fstec.ru/vul/2026-10317 · Security Note
• https://osv.dev/vulnerability/SUSE-SU-2026:0278-1 · Vendor Advisory