PT-2026-30156 · Linux · Linux Kernel

Published 2026-04-03 · Updated 2026-05-26 · CVE-2026-23462

Positive Technologies (AI Summary)

CVSS v3.1

8.8

High

Base vector

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

Name of the Vulnerable Software and Affected Versions Linux kernel versions 7.0.0-rc1 through 7.0.0-rc1

Description The Linux kernel contains a use-after-free (UAF) flaw within the Bluetooth HIDP subsystem. The issue arises from a failure to drop the l2cap conn reference when the user's remove callback is invoked, leading to a potential UAF condition. The provided trace indicates the vulnerability occurs during the disconnection process, specifically within the hci unregister dev and vhci release functions.

Recommendations Update to a newer version of the Linux kernel that addresses this issue.

Fix

Use After Free

Weakness Enumeration

CWE-416

Related Identifiers

CVE-2026-23462

ECHO-71DC-C825-1B34

Affected Products

Linux Kernel

References · 21

• https://osv.dev/vulnerability/DEBIAN-CVE-2026-23462 · Vendor Advisory
• https://git.kernel.org/stable/c/18b1263ece6431bd78fa6b61faaef5281203741c · Patch
• https://cve.org/CVERecord?id=CVE-2026-23462 · Security Note
• https://ubuntu.com/security/CVE-2026-23462 · Vendor Advisory
• https://osv.dev/vulnerability/BELL-CVE-2026-23462 · Vendor Advisory
• https://osv.dev/vulnerability/UBUNTU-CVE-2026-23462 · Vendor Advisory
• https://security-tracker.debian.org/tracker/CVE-2026-23462 · Vendor Advisory
• https://osv.dev/vulnerability/ROOT-OS-UBUNTU-2204-CVE-2026-23462 · Vendor Advisory
• https://osv.dev/vulnerability/ROOT-OS-UBUNTU-2404-CVE-2026-23462 · Vendor Advisory
• https://git.kernel.org/stable/c/21a47a119f33df9bb157326846390d7e8e1b45ba · Patch
• https://git.kernel.org/stable/c/f8b6ed2f06d3baa44f347a0fa2af52433f386463 · Patch
• https://git.kernel.org/stable/c/d955ccbf91ab74d76fe9e4eab2846a7d8a173075 · Patch
• https://git.kernel.org/stable/c/dbf666e4fc9bdd975a61bf682b3f75cb0145eedd · Patch
• https://nvd.nist.gov/vuln/detail/CVE-2026-23462 · Security Note
• https://git.kernel.org/stable/c/4d37fa7582aa960ba23e10a7a2596a29f37ad281 · Patch