CVE-2026-89737High· 7.0▾ TwilightA flaw was found in the Linux kernel's USB Type-C Thunderbolt driver. The `tbt_altmode_remove()` function fails to properly disable and drain work items before freeing associated plug and cable references. This oversight can lead to a use-…
▾ 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 Sep 12.
Disclosure to exploitation, from the record and what we observed since indexing it.
Disclosed via CSAF
0.2%
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none → high
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none → high
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none → high
Last analysed / modified upstream
A flaw was found in the Linux kernel's USB Type-C Thunderbolt driver. The tbt_altmode_remove() function fails to properly disable and drain work items before freeing associated plug and cable references. This oversight can lead to a use-after-free vulnerability, where the system attempts to access memory that has already been released. A local attacker could potentially exploit this to cause a system crash, leading to a denial of service, or possibly achieve arbitrary code execution.
kernel: usb: typec: thunderbolt: Disable work before freeing tbt on remove — rated Moderate by Red Hat. Released 2026-09-11, updated 2026-09-21.
Affected:
No fix planned:
Not affected:
Affected
Field changes observed since this record was first indexed.
Connected by shared product, vendor, weakness, or advisory.
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