CVE-2026-43119: Linux kernel · Bluetooth: hci_sync: annotate data-races around hdev->req_status
Affects Linux kernelSource CVE Database V5
Not known to be exploited · fixed in ff5855e8891e1e2490741366d087fd2fbcaabc4a : update Linux kernel when convenient.
Data as of 30 Oct 2026, 12:48 UTC
Rated Medium by Threat Radar's AI analysis · No CVSS score from NVD or the CNA
Thin evidence
One scorer or none- Patch
- Available – fixed in ff5855e8891e1e2490741366d087fd2fbcaabc4a, e51042ddc0b20d9bda5eb6dcf85a2668f9c5dae4, b6807cfc195ef99e1ac37b2e1e60df40295daa8c +6
Exploitation evidence
Disclosed: evidence found.
CVE published 6 May 2026
Detectable: no evidence on record.
No public nuclei template indexed
Weaponized: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by Mirage: no evidence on record.
No attack traffic recorded by OffSeq Mirage sensors
A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 30 Oct 2026.
What to do
Upgrade to a fixed release listed under Affected software.
Affected software
| Product | Affected | Fixed in |
|---|---|---|
| LinuxLinux | Affected
| Fixed in
|
| LinuxLinux | Affected
| Fixed in– |
AI-suggested
A fix is available and has been applied in Linux kernel versions 4.20, 5.1, and 5.2 and their respective stable branches. Users should update to these fixed versions or later to remediate the issue. No additional mitigation steps are indicated.
Description
A data race vulnerability was identified in the Linux kernel's Bluetooth subsystem involving concurrent unsynchronized access to the hdev->req_status variable. This issue arises because multiple functions access this variable without proper locking, potentially leading to incorrect behavior due to compiler optimizations or concurrent execution on different CPUs. The vulnerability has been addressed by adding READ_ONCE()/WRITE_ONCE() annotations to ensure safe concurrent access.
References
- git.kernel.org/stable/c/ff5855e8891e1e2490741366d087fd2fbcaabc4a (opens in a new tab)
- git.kernel.org/stable/c/e51042ddc0b20d9bda5eb6dcf85a2668f9c5dae4 (opens in a new tab)
- git.kernel.org/stable/c/6e539907c0d11f514c5e0b049b27b04dff48a5b1 (opens in a new tab)
- git.kernel.org/stable/c/a7a1cdb4a64ca74eb95cc46648fccb8cd3f9af27 (opens in a new tab)
- git.kernel.org/stable/c/40734ce8efc34c4a0d0222855798c0dc14b65f2e (opens in a new tab)
- git.kernel.org/stable/c/b6807cfc195ef99e1ac37b2e1e60df40295daa8c (opens in a new tab)