PT-2023-5515 · Linux+5 · Linux Kernel+5

Kevin Rich · Published 2023-09-08 · Updated 2025-12-11 · CVE-2023-5197

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 (affected versions not specified)

Description A use-after-free vulnerability in the Linux kernel's netfilter: nf tables component can be exploited to achieve local privilege escalation. The issue arises from the addition and removal of rules from chain bindings within the same transaction, leading to use-after-free.

Recommendations Upgrade past commit f15f29fd4779be8a418b66e9d52979bb6d6c2325 to resolve the issue. As a temporary workaround, consider restricting access to the netfilter: nf tables component to minimize the risk of exploitation.

Exploit

Fix

LPE

Use After Free

Weakness Enumeration

CWE-416

Related Identifiers

ALT-PU-2023-7004

ALT-PU-2023-7787

ALT-PU-2023-7838

ALT-PU-2024-14046

ALT-PU-2024-6818

AZL-30057

BDU:2023-06163

CVE-2023-5197

DLA-3711-1

DSA-5594-1

LSN-0099-1

MGASA-2023-0295

MGASA-2023-0296

OESA-2023-1843

OESA-2023-1844

OESA-2023-1845

OPENSUSE-SU-2024_0858-1

SUSE-SU-2024:0855-1

SUSE-SU-2024:0858-1

SUSE-SU-2024:0900-1

SUSE-SU-2024:0900-2

SUSE-SU-2024:0910-1

SUSE-SU-2024:0977-1

USN-6443-1

USN-6444-1

USN-6444-2

USN-6445-1

USN-6445-2

USN-6446-1

USN-6446-2

USN-6446-3

USN-6454-1

USN-6454-2

USN-6454-3

USN-6454-4

USN-6466-1

USN-6479-1

Affected Products

Alt Linux

Astra Linux

Linuxmint

Linux Kernel

Suse

Ubuntu

References · 281

• 🔥 https://github.com/google/security-research/tree/master/pocs/linux/kernelctf · Exploit
• https://nvd.nist.gov/vuln/detail/CVE-2023-5197 · Security Note
• https://osv.dev/vulnerability/USN-6446-1 · Vendor Advisory
• https://ubuntu.com/security/notices/USN-6443-1 · Vendor Advisory
• https://osv.dev/vulnerability/USN-6466-1 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2023-4623 · Security Note
• https://osv.dev/vulnerability/OESA-2023-1843 · Vendor Advisory
• https://ubuntu.com/security/CVE-2023-3866 · Vendor Advisory
• https://ubuntu.com/security/CVE-2023-4128 · Vendor Advisory
• https://ubuntu.com/security/CVE-2023-3212 · Vendor Advisory
• https://ubuntu.com/security/CVE-2023-5197 · Vendor Advisory
• https://osv.dev/vulnerability/OESA-2023-1844 · Vendor Advisory
• https://ubuntu.com/security/CVE-2023-4569 · Vendor Advisory
• https://osv.dev/vulnerability/CVE-2023-5197 · Vendor Advisory
• https://ubuntu.com/security/CVE-2023-38430 · Vendor Advisory