PT-2025-18900 · Linux+1 · Linux Kernel+1

Published 2023-03-08 · Updated 2025-05-06 · CVE-2023-53136

Positive Technologies (AI Summary)

CVSS v3.1

7.1

High

Base vector

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

Name of the Vulnerable Software and Affected Versions Linux kernel (affected versions not specified)

Description The issue is related to a memory leak in the Linux kernel, specifically in the af unix module. The problem arises when queue oob() calls maybe add creds(), which potentially holds a reference on a pid, but skb->destructor is not set. This results in a memory leak when kfree skb() or consume skb() is called. The leak was reported by syzbot and is related to struct pid leaks in OOB support.

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

Exploit

Out of bounds Read

Memory Leak

Weakness Enumeration

CWE-125

CWE-401

Related Identifiers

BDU:2026-03865

CVE-2023-53136

Affected Products

Astra Linux

Linux Kernel

References · 23

• 🔥 https://github.com/CVEProject/cvelistV5/tree/main/cves/2023/53xxx/CVE-2023-53136.json · Exploit
• https://osv.dev/vulnerability/UBUNTU-CVE-2023-53136 · Vendor Advisory
• https://osv.dev/vulnerability/CVE-2023-53136 · Vendor Advisory
• https://git.kernel.org/stable/c/ac1968ac399205fda9ee3b18f7de7416cb3a5d0d · Patch
• https://security-tracker.debian.org/tracker/CVE-2023-53136 · Vendor Advisory
• https://git.kernel.org/stable/c/a59d6306263c38e5c0592ea4451ca26a0778c947 · Patch
• https://ubuntu.com/security/CVE-2023-53136 · Vendor Advisory
• https://git.kernel.org/stable/c/f3969427fb06a2c3cd6efd7faab63505cfa76e76 · Patch
• https://nvd.nist.gov/vuln/detail/CVE-2023-53136 · Security Note
• https://cve.org/CVERecord?id=CVE-2023-53136 · Security Note
• https://osv.dev/vulnerability/DEBIAN-CVE-2023-53136 · Vendor Advisory
• https://git.kernel.org/stable/c/2aab4b96900272885bc157f8b236abf1cdc02e08 · Patch
• https://osv.dev/vulnerability/BELL-CVE-2023-53136 · Vendor Advisory
• https://bdu.fstec.ru/vul/2026-03865 · Security Note
• https://t.me/cvetracker/22950 · Telegram Post