CVE-2026-93117
usb: fix UAF when probe runs concurrent to dyn ID removal
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.
INFO
Published Date :
Sept. 17, 2026, 5:18 p.m.
Last Modified :
Sept. 17, 2026, 5:18 p.m.
Remotely Exploit :
No
Source :
416baaa9-dc9f-4396-8d5f-8c081fb06d67
Solution
- Update the Linux kernel to include the fix.
- Document ID validity during the probe.
- Ensure ID validity within usb_dynids_lock.
- Copy dynamic IDs in usb_probe_interface.
References to Advisories, Solutions, and Tools
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CVE-2026-93117.
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2026-93117 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2026-93117
weaknesses.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
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CVE-2026-93117 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2026-93117 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
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New CVE Received by 416baaa9-dc9f-4396-8d5f-8c081fb06d67
Sep. 17, 2026
Action Type Old Value New Value Added 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. Added Affected New affected value received. <a href="https://github.com/CVEProject/cvelistV5/blob/main/cves/2026/93xxx/CVE-2026-93117.json">CVE-2026-93117</a> Added Reference https://git.kernel.org/stable/c/44904468e58d3dc3a0229782acbeb9677b060541 Added Reference https://git.kernel.org/stable/c/64320c6e721bdec4c43a789c866c8a099dd0c843 Added Reference https://git.kernel.org/stable/c/7e795801295c84a6bbc10a3e7a4c99c50bfe45ac Added Reference https://git.kernel.org/stable/c/9b82ddf76827e2a8ff033a8131ecf24f2d6cae26 Added Reference https://git.kernel.org/stable/c/e6a9c6b79b70046afdf5a1dbd03b1104536f30c0 Added Reference https://git.kernel.org/stable/c/ef8154d8b52d60338c1fd8d793cd8e891c604c14