PT-2025-41130 · Linux+1 · Linux Kernel+1

Published 2025-10-07 · Updated 2025-11-28 · CVE-2023-53686

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 6.5.0-rc7-syzkaller-gfe4469582053

Description The Linux kernel contains a flaw in the net/handshake/netlink.c component, specifically within the handshake nl done doit() function. This issue can lead to a null pointer dereference when the socket lookup fails. The vulnerability occurs when attempting to call trace handshake cmd done err() before verifying the socket's validity, potentially causing a system crash. The root cause is an improper check for a valid socket before dereferencing it.

Recommendations Update the Linux kernel to version 6.5.0-rc7-syzkaller-gfe4469582053 or a later version that includes the fix.

Exploit

Fix

NULL Pointer Dereference

Weakness Enumeration

CWE-476

Related Identifiers

CVE-2023-53686

SUSE-SU-2025:21040-1

SUSE-SU-2025:21052-1

SUSE-SU-2025:21056-1

SUSE-SU-2025:21064-1

SUSE-SU-2025:4057-1

SUSE-SU-2025:4128-1

SUSE-SU-2025:4132-1

SUSE-SU-2025:4140-1

SUSE-SU-2025:4141-1

SUSE-SU-2025:4301-1

Affected Products

Linux Kernel

Suse

References · 1010

• 🔥 https://github.com/CVEProject/cvelistV5/tree/main/cves/2023/53xxx/CVE-2023-53686.json · Exploit
• https://git.kernel.org/stable/c/82ba0ff7bf0483d962e592017bef659ae022d754 · Patch
• https://osv.dev/vulnerability/SUSE-SU-2025:4301-1 · Vendor Advisory
• https://osv.dev/vulnerability/SUSE-SU-2025:4128-1 · Vendor Advisory
• https://git.kernel.org/stable/c/93d69f18edcca282351394c5870bec24cc99d745 · Patch
• https://osv.dev/vulnerability/SUSE-SU-2025:4141-1 · Vendor Advisory
• https://osv.dev/vulnerability/DEBIAN-CVE-2023-53686 · Vendor Advisory
• https://osv.dev/vulnerability/CVE-2023-53686 · Vendor Advisory
• https://security-tracker.debian.org/tracker/CVE-2023-53686 · Vendor Advisory
• https://osv.dev/vulnerability/SUSE-SU-2025:21052-1 · Vendor Advisory
• https://osv.dev/vulnerability/SUSE-SU-2025:4057-1 · Vendor Advisory
• https://cve.org/CVERecord?id=CVE-2023-53686 · Security Note
• https://osv.dev/vulnerability/BELL-CVE-2023-53686 · Vendor Advisory
• https://osv.dev/vulnerability/SUSE-SU-2025:4140-1 · Vendor Advisory
• https://osv.dev/vulnerability/SUSE-SU-2025:21064-1 · Vendor Advisory