What’s Vulnerable › Vulnerabilities

CVE-2026-93117: usb: fix UAF when probe runs concurrent to dyn ID removal

• Severity: unknown
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.2% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-09-17 · updated 2026-10-19

Description

In the Linux kernel, the following vulnerability has been resolved: usb: fix UAF when probe runs concurrent to dyn ID removal Dynamic IDs are only guaranteed to be valid when usb_dynids_lock is held, as remove_id_store can free the node. Thus, make a copy in usb_probe_interface. Clarify the documentation that the id parameter is only valid during the probe. USB serial has the same pattern, but it does not need fixing as the IDs cannot be removed via sysfs.

Affected products

• Linux kernel: 2.6.33 — fixed in 7.3

How to fix

Upgrade to a fixed version: Linux kernel 7.3. Check the vendor advisory for mitigations.

References

• https://git.kernel.org/stable/c/44904468e58d3dc3a0229782acbeb9677b060541
• https://git.kernel.org/stable/c/64320c6e721bdec4c43a789c866c8a099dd0c843
• https://git.kernel.org/stable/c/7e795801295c84a6bbc10a3e7a4c99c50bfe45ac
• https://git.kernel.org/stable/c/9b82ddf76827e2a8ff033a8131ecf24f2d6cae26
• https://git.kernel.org/stable/c/e6a9c6b79b70046afdf5a1dbd03b1104536f30c0
• https://git.kernel.org/stable/c/ef8154d8b52d60338c1fd8d793cd8e891c604c14

Get alerted when CVE-2026-93117 or the next vulnerability affects your stack