PT-2026-38951 · Linux · Linux Kernel

Published 2026-05-08 · Updated 2026-05-15 · CVE-2026-43309

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 system hang can occur when stopping a RAID array using the device-mapper's dm-raid target. This happens when a dm-raid managed device tree is suspended from top to bottom and the top-level RAID device is subsequently removed. The dm-raid destructor calls the md stop() function, which attempts to flush the write-intent bitmap by writing to metadata sub-devices. Because these sub-devices are already suspended, they cannot complete the write-intent operations, resulting in an indefinite block.

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

Related Identifiers

CVE-2026-43309

Affected Products

Linux Kernel

References · 15

• https://cve.org/CVERecord?id=CVE-2026-43309 · Security Note
• https://osv.dev/vulnerability/UBUNTU-CVE-2026-43309 · Vendor Advisory
• https://git.kernel.org/stable/c/cefcb9297fbdb6d94b61787b4f8d84f55b741470 · Patch
• https://git.kernel.org/stable/c/338378dfffbdbb8d37a18f0a0c0358812671f91e · Patch
• https://git.kernel.org/stable/c/24783dd06de870d646c25207bae186f78195f912 · Patch
• https://osv.dev/vulnerability/BELL-CVE-2026-43309 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2026-43309 · Security Note
• https://security-tracker.debian.org/tracker/CVE-2026-43309 · Vendor Advisory
• https://osv.dev/vulnerability/DEBIAN-CVE-2026-43309 · Vendor Advisory
• https://ubuntu.com/security/CVE-2026-43309 · Vendor Advisory
• https://twitter.com/hetmehtaa/status/2055151398283837677 · Twitter Post
• https://docs.bell-sw.com/security/cves/CVE-2026-43309 · Note
• https://twitter.com/CVEnew/status/2053174631108944154 · Twitter Post
• https://git.kernel.org/linus/cefcb9297fbdb6d94b61787b4f8d84f55b741470 · Note
• https://t.me/cveNotify/163648 · Telegram Post