PT-2025-13345 · Linux+3 · Linux Kernel+3

Published 2024-04-30 · Updated 2026-02-12 · CVE-2023-52999

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 the fixed version

Description A use-after-free (UaF) issue has been identified in the Linux kernel's netns ops registration error path. When net assign generic() fails, the error path in ops init() attempts to clear the gen pointer slot, but the gen pointer itself has not been modified yet, leading to an out-of-bounds error. This issue was discovered through code inspection and verified with explicit error injection on a kasan-enabled kernel.

Recommendations For Linux kernel versions prior to the fixed version, apply the patch that skips the gen pointer de-reference in the error path to resolve the issue. As a temporary workaround, consider restricting access to the vulnerable ops init() function until a patch is available.

Exploit

Fix

DoS

Use After Free

Weakness Enumeration

CWE-416

Related Identifiers

ALSA-2025_16880

BDU:2025-06318

CVE-2023-52999

RHSA-2024:2394

RHSA-2024_2394

SUSE-SU-2026:0473-1

Affected Products

Astra Linux

Linux Kernel

Red Hat

Red Os

References · 324

• 🔥 https://github.com/CVEProject/cvelistV5/tree/main/cves/2023/52xxx/CVE-2023-52999.json · Exploit
• https://osv.dev/vulnerability/BELL-CVE-2023-52999 · Vendor Advisory
• https://osv.dev/vulnerability/CVE-2023-52999 · Vendor Advisory
• https://git.kernel.org/stable/c/12075708f2e77ee6a9f8bb2cf512c38be3099794 · Patch
• https://git.kernel.org/stable/c/ad0dfe9bcf0d78e699c7efb64c90ed062dc48bea · Patch
• https://nvd.nist.gov/vuln/detail/CVE-2023-52999 · Security Note
• https://git.kernel.org/stable/c/ddd49cbbd4c1ceb38032018b589b44208e54f55e · Patch
• https://osv.dev/vulnerability/SUSE-SU-2026:0473-1 · Vendor Advisory
• https://osv.dev/vulnerability/UBUNTU-CVE-2023-52999 · Vendor Advisory
• https://git.kernel.org/stable/c/d4c008f3b7f7d4ffd311eb2dae5e75b3cbddacd0 · Patch
• https://git.kernel.org/stable/c/71ab9c3e2253619136c31c89dbb2c69305cc89b1 · Patch
• https://git.kernel.org/stable/c/66689a72ba73575e76d4f6a8748d3fa2690ec1c4 · Patch
• https://cve.org/CVERecord?id=CVE-2023-52999 · Security Note
• https://security-tracker.debian.org/tracker/CVE-2023-52999 · Vendor Advisory
• https://bdu.fstec.ru/vul/2025-06318 · Security Note