VulnerabilityPublished 8 May 2026Updated 6 Nov 2026

CVE-2026-43429: Linux kernel · USB: usbtmc: Use usb_bulk_msg_killable() with user-specified timeouts

Affects Linux kernelSource CVE Database V5

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Not known to be exploited · fixed in e14a0dcdf468c3ad616bb06696c7c64c36e736d8 : update Linux kernel when convenient.

Data as of 6 Nov 2026, 15:49 UTC

Severity

Unrated

Rated by Threat Radar · No CVSS score from NVD or the CNA

Thin evidence

One scorer or none

Exploitation: No evidence of active exploitation and no public proof of concept
Automatable: Attackers cannot reliably automate steps 1–4 of the kill chain
Technical impact: Limited control over the software or limited information exposure

CISA SSVC assessment, 2026-11-06.

Patch

Available – fixed in e14a0dcdf468c3ad616bb06696c7c64c36e736d8, d4f1c45bdff3f393f9ab7e76795901c442b9eb76, 7784caa413a89487dd14dd5c41db8753483b2acb +5

Exploitation evidence

Disclosed: evidence found.
CVE published 8 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 6 Nov 2026.

Disclosed: The CVE record is public on cve.org. Its publication is t = 0.
Detectable: A public nuclei template can find exposed instances, for defenders and attackers alike.
Weaponized: A Metasploit exploit module or Exploit-DB entry exists (Metasploit scanner modules do not count), or CISA SSVC or the CVSS exploit maturity reports a public proof of concept.
Exploited in the wild: CISA KEV lists it, CISA SSVC rates exploitation active, or a source reports attacks.
Observed by OffSeq Mirage: OffSeq Mirage honeypot sensors recorded attack traffic for this CVE, or found exposed hosts without attack traffic.

Moments are spaced evenly, not to scale; a dashed line marks a gap of six months or more. Deltas count from t = 0. Sources that give only a date (CISA KEV, Exploit-DB, or a time of exactly 00:00Z) read “same day” rather than hours. Metasploit modules carry the flaw’s disclosure date, not their release date, and nuclei templates carry no date, so both appear above but not on the timeline.

What to do

Upgrade to a fixed release listed under Affected software.

Affected software

Product	Affected	Fixed in
LinuxLinux	Affected ≥ 048c6d88a0214757926f264823829e79154fcd4f, < e14a0dcdf468c3ad616bb06696c7c64c36e736d8	Fixed in e14a0dcdf468c3ad616bb06696c7c64c36e736d8
LinuxLinux	Affected ≥ 048c6d88a0214757926f264823829e79154fcd4f, < d4f1c45bdff3f393f9ab7e76795901c442b9eb76	Fixed in d4f1c45bdff3f393f9ab7e76795901c442b9eb76
LinuxLinux	Affected ≥ 048c6d88a0214757926f264823829e79154fcd4f, < 7784caa413a89487dd14dd5c41db8753483b2acb	Fixed in 7784caa413a89487dd14dd5c41db8753483b2acb
LinuxLinux	Affected ≥ 048c6d88a0214757926f264823829e79154fcd4f, < 0535f84cb94c9d8bcba0a2a5b3fac81b7d97235d	Fixed in 0535f84cb94c9d8bcba0a2a5b3fac81b7d97235d
LinuxLinux	Affected ≥ 048c6d88a0214757926f264823829e79154fcd4f, < 72c0a063489be183cfb99e7050aaef503bdb6449	Fixed in 72c0a063489be183cfb99e7050aaef503bdb6449
LinuxLinux	Affected ≥ 048c6d88a0214757926f264823829e79154fcd4f, < 39bd4097292fd8564cf2cfba9356f8ab11e38d12	Fixed in 39bd4097292fd8564cf2cfba9356f8ab11e38d12

Description

In the Linux kernel, the following vulnerability has been resolved: USB: usbtmc: Use usb_bulk_msg_killable() with user-specified timeouts The usbtmc driver accepts timeout values specified by the user in an ioctl command, and uses these timeouts for some usb_bulk_msg() calls. Since the user can specify arbitrarily long timeouts and usb_bulk_msg() uses unkillable waits, call usb_bulk_msg_killable() instead to avoid the possibility of the user hanging a kernel thread indefinitely.

References

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