PT-2026-39101 · Linux · Linux Kernel

CVE-2026-43440 · Published 2026-05-08 · Updated 2026-05-15

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 Linux kernel within the mana gd setup() function error path. The problem occurs because the service wq pointer is not set to NULL after destroy workqueue() is called during a setup error, which can lead to a double destroy if the pointer is checked after a failed setup.

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-2026-43440

Affected Products

Linux Kernel

References · 17

• 🔥 https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/43xxx/CVE-2026-43440.json · Exploit
• https://osv.dev/vulnerability/CVE-2026-43440 · Vendor Advisory
• https://git.kernel.org/stable/c/87c2302813abc55c46485711a678e3c312b00666 · Patch
• https://osv.dev/vulnerability/DEBIAN-CVE-2026-43440 · Vendor Advisory
• https://git.kernel.org/stable/c/59489ce60d7412ed82fb1d8002faa3102dcd4916 · Patch
• https://osv.dev/vulnerability/UBUNTU-CVE-2026-43440 · Vendor Advisory
• https://ubuntu.com/security/CVE-2026-43440 · Vendor Advisory
• https://cve.org/CVERecord?id=CVE-2026-43440 · Security Note
• https://security-tracker.debian.org/tracker/CVE-2026-43440 · Vendor Advisory
• https://git.kernel.org/stable/c/6c92392602b451e3869f15ab685f8f650e942b13 · Patch
• https://osv.dev/vulnerability/BELL-CVE-2026-43440 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2026-43440 · Security Note
• https://docs.bell-sw.com/security/cves/CVE-2026-43440 · Note
• https://twitter.com/CVEnew/status/2052767629035839526 · Twitter Post
• https://git.kernel.org/linus/87c2302813abc55c46485711a678e3c312b00666 · Note