CVE-2026-89623: Linux kernel · HID: mcp2221: stop device IO before hid_hw_stop
Affects Linux kernelSource CVE Database V5
Not known to be exploited · fixed in dca151633c0fde90935311c60e7cfc064aa56134 : update Linux kernel when convenient.
Data as of 26 Oct 2026, 14:00 UTC
Rated Medium by Threat Radar's AI analysis · CVSS not yet scored by NVD
- EPSS
- 0.2% chance of exploitation in 30 days – higher than 10% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
- Patch
- Available – fixed in dca151633c0fde90935311c60e7cfc064aa56134, c99ba6c234d4d537c317336376b78c088174034a, 85d963499f1feeea287c0a37c3eac3fc1898eca9 +3
Exploitation evidence
Disclosed: evidence found.
CVE published 11 Sep 2026
Detectable: no evidence on record.
No public nuclei template indexed
Weaponised: 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 26 Oct 2026.
What to do
Upgrade to a fixed release listed under Affected software.
Affected software
| Product | Affected | Fixed in |
|---|---|---|
| LinuxLinux | Affected
| Fixed in
|
| LinuxLinux | Affected
| Fixed in– |
AI-suggested
This vulnerability has been fixed in Linux kernel version 6.6.157 and later. Users should update to version 6.6.157 or newer to remediate this issue. No additional mitigation steps are required as the fix is available.
Description
A use-after-free vulnerability in the Linux kernel's HID driver for the mcp2221 device was addressed by ensuring device IO is stopped before hardware teardown during probe failure or device removal. The fix involves quiescing device IO at the start of the cleanup callback to prevent race conditions with incoming HID reports. Additional guarding prevents spurious warnings during normal device removal.
References
- git.kernel.org/stable/c/85d963499f1feeea287c0a37c3eac3fc1898eca9 (opens in a new tab)
- git.kernel.org/stable/c/0ae90a19e6b5a8557d25d95facb7e01c9c07af38 (opens in a new tab)
- git.kernel.org/stable/c/c99ba6c234d4d537c317336376b78c088174034a (opens in a new tab)
- git.kernel.org/stable/c/2eda1513f573945c1e3a0090341f3d28740463b1 (opens in a new tab)
- git.kernel.org/stable/c/dca151633c0fde90935311c60e7cfc064aa56134 (opens in a new tab)