PT-2026-39014 · Linux · Linux Kernel

Published 2026-05-08 · Updated 2026-05-26 · CVE-2026-43353

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 race condition exists in the HCI DMA dequeue path within the hci dma dequeue xfer() function. This function, which is not serialized, can be invoked for multiple transfers that timeout simultaneously. When a timeout occurs, the function stops the ring, processes incomplete transfers, and restarts the ring. Parallel calls to this function can interfere with each other, leading to the ring being stopped or restarted at unexpected times.

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

Race Condition

Weakness Enumeration

CWE-362

Related Identifiers

CVE-2026-43353

Affected Products

Linux Kernel

References · 15

• https://ubuntu.com/security/CVE-2026-43353 · Vendor Advisory
• https://osv.dev/vulnerability/DEBIAN-CVE-2026-43353 · Vendor Advisory
• https://cve.org/CVERecord?id=CVE-2026-43353 · Security Note
• https://osv.dev/vulnerability/BELL-CVE-2026-43353 · Vendor Advisory
• https://git.kernel.org/stable/c/b684b420a5bb0ea1b0e13abfdb8ce41c5266e62e · Patch
• https://osv.dev/vulnerability/ROOT-OS-UBUNTU-2204-CVE-2026-43353 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2026-43353 · Security Note
• https://git.kernel.org/stable/c/4faa1e9c67a2229f6749190aedaf88ce0391efd2 · Patch
• https://git.kernel.org/stable/c/1dca8aee80eea76d2aae21265de5dd64f6ba0f09 · Patch
• https://osv.dev/vulnerability/UBUNTU-CVE-2026-43353 · Vendor Advisory
• https://security-tracker.debian.org/tracker/CVE-2026-43353 · Vendor Advisory
• https://git.kernel.org/linus/1dca8aee80eea76d2aae21265de5dd64f6ba0f09 · Note
• https://docs.bell-sw.com/security/cves/CVE-2026-43353 · Note
• https://twitter.com/hetmehtaa/status/2055151398283837677 · Twitter Post
• https://twitter.com/CVEnew/status/2052811018246521228 · Twitter Post