High [CVE-2026-89737] Linux kernel: Thunderbolt driver use-after-free vulnerability
This high-severity Red Hat Linux advisory covers CVE-2026-89737.
Android app · Google Play
Monitor future Red Hat Linux CVEs from your phone.
Choose a whole vendor or a precise platform, then receive matching security advisories by phone notification, email, or both. Coverage follows 32 official vendor sources and 160+ reviewed platform categories.
Summary
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.
Red Hat severity: Moderate — CVSS 7 (CVSS:3.1/AV:P/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H). Weakness: CWE-825.
Affected versions
No affected-version range was extracted from the source record. The vendor advisory is authoritative — check it before change work.
Official advisory · medium-confidence parse· fetched 1 hour ago·verify at source
Fixed versions
No fixed release is recorded yet. That does not prove no patch exists — confirm against the vendor advisory.
Official advisory · medium-confidence parse· fetched 1 hour ago·verify at source
Mitigation
The source record does not include mitigation steps. That is not a statement that no fix exists — read the vendor advisory below for the authoritative guidance.
Official advisory · medium-confidence parse· fetched 1 hour ago·verify at source
Discussion(0)
No comments yet. Share field notes, upgrade gotchas, or questions — verify against the vendor advisory before acting on community advice.
Sign in to join the discussion.