PT-2026-37064 · Linux · Linux Kernel

Published 2026-05-05 · Updated 2026-05-26 · CVE-2026-43061

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 TX deadlock occurs when using DMA in the 8250 serial driver. The dmaengine terminate async function does not guarantee the execution of the dma tx complete callback, which is the only mechanism used to clear the dma->tx running variable. If a transaction is canceled and the callback fails to run, dma->tx running remains set, preventing the scheduling of new TX DMA transactions.

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

Improper Locking

Weakness Enumeration

CWE-667

Related Identifiers

CVE-2026-43061

Affected Products

Linux Kernel

References · 19

• https://osv.dev/vulnerability/BELL-CVE-2026-43061 · Vendor Advisory
• https://git.kernel.org/stable/c/b5ad887339503103d0fbe9827b16ad287597c275 · Patch
• https://git.kernel.org/stable/c/f76d91271bcacbd759a2e4ee3ea61faa6a727ccf · Patch
• https://nvd.nist.gov/vuln/detail/CVE-2026-43061 · Security Note
• https://ubuntu.com/security/CVE-2026-43061 · Vendor Advisory
• https://git.kernel.org/stable/c/2a72403b985aea6b4aac3171830492f9a387f9e1 · Patch
• https://osv.dev/vulnerability/DEBIAN-CVE-2026-43061 · Vendor Advisory
• https://cve.org/CVERecord?id=CVE-2026-43061 · Security Note
• https://git.kernel.org/stable/c/8190f9ab6ad90cb97652adbebd238b874a4ef70d · Patch
• https://git.kernel.org/stable/c/5f6b17562f03fc65c7d3474ef8f1959b19d1ca41 · Patch
• https://osv.dev/vulnerability/ROOT-OS-UBUNTU-2204-CVE-2026-43061 · Vendor Advisory
• https://osv.dev/vulnerability/UBUNTU-CVE-2026-43061 · Vendor Advisory
• https://git.kernel.org/stable/c/d2719a0a9c3439abf67843a5504b7afccd9ded93 · Patch
• https://security-tracker.debian.org/tracker/CVE-2026-43061 · Vendor Advisory
• https://git.kernel.org/stable/c/a424a34b8faddf97b5af41689087e7a230f79ba7 · Patch