CVE-2026-80824High· 7.0▾ TwilightA flaw was found in the Linux kernel's USB subsystem (usbfs). An unprivileged local attacker with read/write access to a /dev/bus/usb node could exploit a use-after-free vulnerability. This occurs because the usb_device structure is premat…
▾ Twilight zone — High severity, or a signal on a lesser flaw
impact 38.5 · likelihood 0 · exploitation 0
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Exploit-prediction probability, daily snapshots since Oct 19.
Disclosure to exploitation, from the record and what we observed since indexing it.
Disclosed via CSAF
0.2%
Last analysed / modified upstream
— → 7
none → high
A flaw was found in the Linux kernel's USB subsystem (usbfs). An unprivileged local attacker with read/write access to a /dev/bus/usb node could exploit a use-after-free vulnerability. This occurs because the usb_device structure is prematurely freed before all pending operations are completed. Successful exploitation of this memory corruption flaw could lead to a system crash or potentially privilege escalation.
kernel: usb: usbfs: fix use-after-free of usb_device in usbdev_release() — rated Important by Red Hat. Released 2026-09-04, updated 2026-10-26.
Affected:
Fixed:
No fix planned:
For details on how to apply this update, which includes the changes described in this advisory, refer to:
https://access.redhat.com/articles/11258
The system must be rebooted for this update to take effect.
Red Hat recommends treating all kernel errata as security-relevant. Given the kernel's fundamental role, any bug has a higher chance of impacting system security, even if that impact only becomes clear after a fix is published. Therefore, Red Hat prioritizes delivering fixes that improve our customers' overall security posture.
Because of this proactive approach, a patch may be associa… https://access.redhat.com/errata/RHSA-2026:89083
Workarounds / mitigations:
Field changes observed since this record was first indexed.
Connected by shared product, vendor, weakness, or advisory.
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