What’s Vulnerable › Vulnerabilities

CVE-2026-23347: can: usb: f81604: correctly anchor the urb in the read bulk callback

• 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: 2026-03-25 · updated 2026-06-17

Description

In the Linux kernel, the following vulnerability has been resolved: can: usb: f81604: correctly anchor the urb in the read bulk callback When submitting an urb, that is using the anchor pattern, it needs to be anchored before submitting it otherwise it could be leaked if usb_kill_anchored_urbs() is called. This logic is correctly done elsewhere in the driver, except in the read bulk callback so do that here also.

Affected products

• Linux kernel: from 6.5.1 before 6.6.130; from 6.7 before 6.12.77; from 6.13 before 6.18.17; from 6.19 before 6.19.7; 6.5, 7.0-rc1, 7.0-rc2, 7.0-rc3, 7.0-rc4, 7.0-rc5 (+2) — fixed in 6.12.77, 6.18.17, 6.19.7, 6.6.130

How to fix

Upgrade to a fixed version: Linux kernel 6.12.77, 6.18.17, 6.19.7, 6.6.130. Check the vendor advisory for mitigations.

References

• https://git.kernel.org/stable/c/54ee74307165b348b2fddcd7942eb48fb4ee1237
• https://git.kernel.org/stable/c/7724645c4792914cd07f36718816c5369cc57970
• https://git.kernel.org/stable/c/952caa5da10bed22be09612433964f6877ba0dde
• https://git.kernel.org/stable/c/c001214e12202338425d6dda5d2a1919d674282d
• https://git.kernel.org/stable/c/f6d80b104f904a6da922907394eec66d3e2ffc57

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