PT-2026-8203 · Linux · Linux Kernel

Published 2026-01-01 · Updated 2026-02-14 · CVE-2026-23195

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 6.19.0-rc7-next-20260129+ #11

Description An use-after-free (UAF) issue exists in the cgroup/dmem subsystem of the Linux kernel. The problem arises because a memory pool can be freed while still being referenced by callers, leading to a potential UAF condition. Specifically, the issue occurs when a pool is freed even if users still hold references to it before uncharge operations are completed. The fix involves adding a reference counter to each pool, ensuring it is only freed when the reference count reaches zero.

Recommendations Update to Linux kernel version 6.19.0-rc7-next-20260129+ #11 or a later version to address this vulnerability.

Exploit

Fix

Use After Free

Weakness Enumeration

CWE-416

Related Identifiers

CVE-2026-23195

Affected Products

Linux Kernel

References · 15

• 🔥 https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/23xxx/CVE-2026-23195.json · Exploit
• https://git.kernel.org/stable/c/d3081353acaa6a638dcf75726066ea556a2de8d5 · Patch
• https://ubuntu.com/security/CVE-2026-23195 · Vendor Advisory
• https://osv.dev/vulnerability/CVE-2026-23195 · Vendor Advisory
• https://cve.org/CVERecord?id=CVE-2026-23195 · Security Note
• https://security-tracker.debian.org/tracker/CVE-2026-23195 · Vendor Advisory
• https://git.kernel.org/stable/c/99a2ef500906138ba58093b9893972a5c303c734 · Patch
• https://nvd.nist.gov/vuln/detail/CVE-2026-23195 · Security Note
• https://osv.dev/vulnerability/UBUNTU-CVE-2026-23195 · Vendor Advisory
• https://osv.dev/vulnerability/DEBIAN-CVE-2026-23195 · Vendor Advisory
• https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git · Note
• https://twitter.com/vuldb/status/2022743442510745960 · Twitter Post
• https://twitter.com/CVEnew/status/2022716613896597559 · Twitter Post
• https://git.kernel.org/linus/99a2ef500906138ba58093b9893972a5c303c734 · Note
• https://t.me/CVEtracker/44731 · Telegram Post