PT-2026-30182 · Linux · Linux Kernel

Dingisoul · Published 2026-03-06 · Updated 2026-04-20 · CVE-2026-31399

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 contained a use-after-free issue within the nd async device register() function during asynchronous initialization. This occurred when device add() failed, leading to a drop in the device reference count to zero before the parent pointer was accessed. The issue was identified using KASAN by Dingisoul and addressed by holding a reference to the parent pointer to ensure it remains valid regardless of the outcome of device add().

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

Use After Free

Weakness Enumeration

CWE-911

CWE-416

Related Identifiers

BDU:2026-05768

CVE-2026-31399

ECHO-9792-2894-348B

OESA-2026-1946

OESA-2026-1947

OESA-2026-1948

Affected Products

Linux Kernel

References · 43

• https://git.kernel.org/stable/c/e48bf8f1d2b12c1c5ba1f609edbd4cde5dadc20e · Patch
• https://osv.dev/vulnerability/ROOT-OS-UBUNTU-2404-CVE-2026-31399 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2026-23461 · Security Note
• https://ubuntu.com/security/CVE-2026-31399 · Vendor Advisory
• https://osv.dev/vulnerability/ROOT-OS-UBUNTU-2204-CVE-2026-31399 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2026-23441 · Security Note
• https://osv.dev/vulnerability/DEBIAN-CVE-2026-31399 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2026-31393 · Security Note
• https://nvd.nist.gov/vuln/detail/CVE-2026-23389 · Security Note
• https://osv.dev/vulnerability/OESA-2026-1947 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2026-23444 · Security Note
• https://nvd.nist.gov/vuln/detail/CVE-2026-31408 · Security Note
• https://git.kernel.org/stable/c/a8aec14230322ed8f1e8042b6d656c1631d41163 · Patch
• https://git.kernel.org/stable/c/6fc36c2a925ceaba203eb13d75a8f0879a2c121b · Patch
• https://nvd.nist.gov/vuln/detail/CVE-2026-23440 · Security Note