PT-2026-26577 · Linux · Linux Kernel

Published 2026-01-01 · Updated 2026-05-23 · CVE-2026-23272

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 An issue exists in the netfilter nf tables component where set->nelems is unconditionally incremented before insertion. If the set is full, a new element is published and subsequently removed without waiting for the Read-Copy-Update (RCU) grace period—a mechanism that ensures all readers have finished accessing a piece of data before it is deleted—while an RCU reader may already be traversing it.

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

Exploit

Related Identifiers

CVE-2026-23272

OPENSUSE-SU-2026:20572-1

SUSE-SU-2026:1342-1

SUSE-SU-2026:1557-1

SUSE-SU-2026:1563-1

SUSE-SU-2026:1573-1

SUSE-SU-2026:1574-1

SUSE-SU-2026:1575-1

SUSE-SU-2026:1606-1

SUSE-SU-2026:1643-1

SUSE-SU-2026:1661-1

SUSE-SU-2026:1668-1

SUSE-SU-2026:21114-1

SUSE-SU-2026:21123-1

SUSE-SU-2026:21237-1

SUSE-SU-2026:21255-1

SUSE-SU-2026:21352-1

SUSE-SU-2026:21361-1

Affected Products

Linux Kernel

References · 231

• 🔥 https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/23xxx/CVE-2026-23272.json · Exploit
• https://osv.dev/vulnerability/SUSE-SU-2026:21114-1 · Vendor Advisory
• https://osv.dev/vulnerability/SUSE-SU-2026:1606-1 · Vendor Advisory
• https://ubuntu.com/security/CVE-2026-23272 · Vendor Advisory
• https://osv.dev/vulnerability/BELL-CVE-2026-23272 · Vendor Advisory
• https://osv.dev/vulnerability/SUSE-SU-2026:21255-1 · Vendor Advisory
• https://osv.dev/vulnerability/SUSE-SU-2026:1574-1 · Vendor Advisory
• https://osv.dev/vulnerability/CVE-2026-23272 · Vendor Advisory
• https://security-tracker.debian.org/tracker/CVE-2026-23272 · Vendor Advisory
• https://osv.dev/vulnerability/openSUSE-SU-2026:20572-1 · Vendor Advisory
• https://osv.dev/vulnerability/SUSE-SU-2026:21123-1 · Vendor Advisory
• https://cve.org/CVERecord?id=CVE-2026-23272 · Security Note
• https://osv.dev/vulnerability/ROOT-OS-UBUNTU-2204-CVE-2026-23272 · Vendor Advisory
• https://osv.dev/vulnerability/SUSE-SU-2026:1575-1 · Vendor Advisory
• https://osv.dev/vulnerability/SUSE-SU-2026:1573-1 · Vendor Advisory