What’s Vulnerable › Vulnerabilities

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

• Severity: medium (CVSS 5.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.1% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-05-08 · updated 2026-06-17

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.

Affected products

• Linux kernel: from 4.19 before 5.10.253; from 5.11 before 5.15.203; from 5.16 before 6.1.167; from 6.2 before 6.6.130; from 6.7 before 6.12.78; from 6.13 before 6.18.19 — fixed in 5.10.253, 5.15.203, 6.1.167, 6.12.78, 6.18.19, 6.19.9

How to fix

Upgrade to a fixed version: Linux kernel 5.10.253, 5.15.203, 6.1.167, 6.12.78. Check the vendor advisory for mitigations.

References

• https://git.kernel.org/stable/c/0535f84cb94c9d8bcba0a2a5b3fac81b7d97235d
• https://git.kernel.org/stable/c/39bd4097292fd8564cf2cfba9356f8ab11e38d12
• https://git.kernel.org/stable/c/6cb7dc91f057dd8ce44f6caa2995d8e22784ed0a
• https://git.kernel.org/stable/c/72c0a063489be183cfb99e7050aaef503bdb6449
• https://git.kernel.org/stable/c/7784caa413a89487dd14dd5c41db8753483b2acb
• https://git.kernel.org/stable/c/7fa72c369c23c27d1f64883c1e276af950557fb1
• https://git.kernel.org/stable/c/d4f1c45bdff3f393f9ab7e76795901c442b9eb76
• https://git.kernel.org/stable/c/e14a0dcdf468c3ad616bb06696c7c64c36e736d8

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