PT-2026-36473 · Linux · Linux Kernel

Published 2026-03-24 · Updated 2026-06-11 · CVE-2026-43056

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 A use-after-free issue exists in the net: mana component. When the auxiliary device add() function fails, the add adev() function triggers a cleanup path that calls auxiliary device uninit(adev). Because the auxiliary device uses adev release() as its release callback, the struct mana adev is freed. A subsequent access to the id variable within the adev structure during the init fail process leads to a use-after-free condition.

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-416

CWE-825

Related Identifiers

ALSA-2026:25217

BDU:2026-07836

CVE-2026-43056

Affected Products

Linux Kernel

References · 45

• https://osv.dev/vulnerability/UBUNTU-CVE-2026-43056 · Vendor Advisory
• https://git.kernel.org/stable/c/d88541ffd56d62a61e77209080001eddd4d69815 · Patch
• https://git.kernel.org/stable/c/43f5b19fd190fea20d052bc84741b28031d5baa9 · Patch
• https://osv.dev/vulnerability/DEBIAN-CVE-2026-43056 · Vendor Advisory
• https://security-tracker.debian.org/tracker/CVE-2026-43056 · Vendor Advisory
• https://bdu.fstec.ru/vul/2026-07836 · Security Note
• https://osv.dev/vulnerability/ALSA-2026:25217 · Vendor Advisory
• https://git.kernel.org/stable/c/e5a75bf026c686b91a7dc6f9c5caf5016745d1fe · Patch
• https://osv.dev/vulnerability/BELL-CVE-2026-43056 · Vendor Advisory
• https://ubuntu.com/security/CVE-2026-43056 · Vendor Advisory
• https://cve.org/CVERecord?id=CVE-2026-43056 · Security Note
• https://git.kernel.org/stable/c/c4ea7d8907cf72b259bf70bd8c2e791e1c4ff70f · Patch
• https://git.kernel.org/stable/c/5f4061f8225d18695e5afe9bbf1cb7bd673d7872 · Patch
• https://errata.almalinux.org/9/ALSA-2026-25217.html · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2026-43056 · Security Note