PT-2025-11271 · Linux+6 · Linux Kernel+6

Published 2023-07-20 · Updated 2026-03-14 · CVE-2023-52927

Positive Technologies (AI Summary)

CVSS v3.1

7.8

High

Base vector

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

Name of the Vulnerable Software and Affected Versions

Linux kernel versions prior to 6.1.133-1 (Debian bookworm) and versions prior to 6.1.137-1~deb11u1 (Debian 11 bullseye).

Description

The Linux kernel contains a vulnerability in the netfilter module where the exp (expectation) object may not be removed from the hash table in certain scenarios, specifically when the created connection tracking (ct) object is not confirmed, such as in Open vSwitch (OVS) and TC conntrack. This is resolved by allowing the exp object to remain in the hash table by setting the IPS CONFIRMED status in the template (tmpl).

Recommendations

• Upgrade to Linux kernel version 6.1.133-1 or later for Debian bookworm.
• Upgrade to Linux kernel version 6.1.137-1~deb11u1 or later for Debian 11 bullseye.

Exploit

Fix

Use After Free

RCE

Weakness Enumeration

CWE-416

CWE-20

Related Identifiers

BDU:2025-11958

CVE-2023-52927

DLA-4193-1

DSA-5900-1

ECHO-CAD7-E893-4B9C

OESA-2026-1341

OPENSUSE-SU-2025_1177-1

OPENSUSE-SU-2025_1178-1

OPENSUSE-SU-2025_1180-1

SUSE-SU-2025:01919-1

SUSE-SU-2025:01951-1

SUSE-SU-2025:01967-1

SUSE-SU-2025:02334-1

SUSE-SU-2025:02588-1

SUSE-SU-2025:02848-1

SUSE-SU-2025:02849-1

SUSE-SU-2025:02850-1

SUSE-SU-2025:02851-1

SUSE-SU-2025:02852-1

SUSE-SU-2025:1177-1

SUSE-SU-2025:1178-1

SUSE-SU-2025:1180-1

SUSE-SU-2025:20190-1

SUSE-SU-2025:20192-1

SUSE-SU-2025:20260-1

SUSE-SU-2025:20270-1

SUSE-SU-2025:2588-1

SUSE-SU-2025_01951-1

SUSE-SU-2025_01967-1

SUSE-SU-2025_02334-1

SUSE-SU-2025_02588-1

SUSE-SU-2025_02848-1

SUSE-SU-2025_02849-1

SUSE-SU-2025_1177-1

SUSE-SU-2025_1178-1

SUSE-SU-2025_1180-1

USN-7494-1

USN-7494-2

USN-7494-3

USN-7494-4

USN-7494-5

USN-7495-1

USN-7495-2

USN-7495-3

USN-7496-1

USN-7496-2

USN-7496-3

USN-7496-4

USN-7496-5

USN-7512-1

USN-7517-1

USN-7517-2

USN-7517-3

USN-7518-1

USN-7539-1

USN-7540-1

USN-7602-1

USN-7640-1

Affected Products

Astra Linux

Debian

Linuxmint

Linux Kernel

Red Os

Suse

Ubuntu

References · 2253

• 🔥 https://github.com/CVEProject/cvelistV5/tree/main/cves/2023/52xxx/CVE-2023-52927.json · Exploit
• 🔥 https://github.com/seadragnol/security-research/tree/master/pocs/linux/kernelctf/CVE-2023-52927_cos · Exploit
• 🔥 https://seadragnol.github.io/posts/CVE-2023-52927 · Exploit
• https://ubuntu.com/security/CVE-2024-56594 · Vendor Advisory
• https://ubuntu.com/security/CVE-2024-50205 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2022-50616 · Security Note
• https://nvd.nist.gov/vuln/detail/CVE-2026-23038 · Security Note
• https://nvd.nist.gov/vuln/detail/CVE-2025-68819 · Security Note
• https://ubuntu.com/security/CVE-2025-22045 · Vendor Advisory
• https://ubuntu.com/security/CVE-2025-22056 · Vendor Advisory
• https://ubuntu.com/security/CVE-2024-56780 · Vendor Advisory
• https://ubuntu.com/security/CVE-2025-21718 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2025-39860 · Security Note
• https://ubuntu.com/security/CVE-2024-50287 · Vendor Advisory
• https://ubuntu.com/security/CVE-2024-56581 · Vendor Advisory