PT-2026-27709 · Linux · Linux Kernel

Published 2026-01-01 · Updated 2026-04-20 · CVE-2026-23344

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 The Linux kernel contains a use-after-free issue within the crypto/ccp module. Specifically, the error path in the sev tsm init locked() function dereferences a pointer (t) after the associated memory has been freed using kfree(). This occurs when attempting to access t->tio en and t->tio init done after the memory has been released. The issue was identified by the Smatch static analyzer.

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

Exploit

Use After Free

Weakness Enumeration

CWE-416

Related Identifiers

CVE-2026-23344

Affected Products

Linux Kernel

References · 16

• 🔥 https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/23xxx/CVE-2026-23344.json · Exploit
• https://ubuntu.com/security/CVE-2026-23344 · Vendor Advisory
• https://git.kernel.org/stable/c/889b0e2721e793eb46cf7d17b965aa3252af3ec8 · Patch
• https://osv.dev/vulnerability/DEBIAN-CVE-2026-23344 · Vendor Advisory
• https://osv.dev/vulnerability/UBUNTU-CVE-2026-23344 · Vendor Advisory
• https://osv.dev/vulnerability/ROOT-OS-UBUNTU-2204-CVE-2026-23344 · Vendor Advisory
• https://osv.dev/vulnerability/ROOT-OS-UBUNTU-2404-CVE-2026-23344 · Vendor Advisory
• https://git.kernel.org/stable/c/79a26fe3175b9ed7c0c9541b197cb9786237c0f7 · Patch
• https://osv.dev/vulnerability/CVE-2026-23344 · Vendor Advisory
• https://cve.org/CVERecord?id=CVE-2026-23344 · Security Note
• https://security-tracker.debian.org/tracker/CVE-2026-23344 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2026-23344 · Security Note
• https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git · Note
• https://twitter.com/CVEnew/status/2036763503600546196 · Twitter Post
• https://git.kernel.org/linus/889b0e2721e793eb46cf7d17b965aa3252af3ec8 · Note