PT-2026-26123 · Linux · Linux Kernel

Published 2026-01-01 · Updated 2026-05-24 · CVE-2026-23263

Positive Technologies (AI Summary)

CVSS v3.1

5.5

Medium

Base vector

AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Name of the Vulnerable Software and Affected Versions Linux kernel (affected versions not specified)

Description A page array leak existed in the io uring/zcrx functionality of the Linux kernel. A previous fix addressed a page leakage issue but failed to release the associated page array, leading to a continued memory leak. The commit d9f595b9a65e resolved this by ensuring the page array is released when initialization fails.

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

Exploit

Improper Resource Release

Weakness Enumeration

CWE-404

Related Identifiers

BDU:2026-03447

CVE-2026-23263

Affected Products

Linux Kernel

References · 17

• 🔥 https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/23xxx/CVE-2026-23263.json · Exploit
• https://osv.dev/vulnerability/DEBIAN-CVE-2026-23263 · Vendor Advisory
• https://security-tracker.debian.org/tracker/CVE-2026-23263 · Vendor Advisory
• https://osv.dev/vulnerability/CVE-2026-23263 · Vendor Advisory
• https://ubuntu.com/security/CVE-2026-23263 · Vendor Advisory
• https://cve.org/CVERecord?id=CVE-2026-23263 · Security Note
• https://bdu.fstec.ru/vul/2026-03447 · Security Note
• https://nvd.nist.gov/vuln/detail/CVE-2026-23263 · Security Note
• https://osv.dev/vulnerability/UBUNTU-CVE-2026-23263 · Vendor Advisory
• https://twitter.com/dailycve/status/2058342782763204782 · Twitter Post
• https://twitter.com/CVEnew/status/2034365253350547882 · Twitter Post
• https://lore.kernel.org/linux-cve-announce/2026031820-CVE-2026-23263-5c88@gregkh · Note
• https://git.kernel.org/stable/c/64cf3016234ce8a6e4195ed1b2d9e2a1ae41b57d · Note
• https://git.kernel.org/linus/0ae91d8ab70922fb74c22c20bedcb69459579b1c · Note
• https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git · Note