usb: typec: thunderbolt: Disable work before freeing tbt on remove
In the Linux kernel, the following vulnerability has been resolved: usb: typec: thunderbolt: Disable work before freeing tbt on remove tbt_altmode_remove() drops the plug and cable references without draining tbt->work. The work function dereferences those references, and can also requeue itself in its error path. The VDM callbacks can queue the same work item. Disable and drain tbt->work before dropping the references. This waits for an existing invocation and prevents subsequent schedule_work() calls from queueing it during teardown. This issue was found by an in-house static analysis tool and confirmed by manual code review.
CVE-2026-89737
Primary source · Revision 1
Imported from structured advisory data. Source references identify upstream records or fields; verify affected versions and your deployed configuration.
Security context
Source reference: cve:CVE-2026-89737
Linux
Source reference: /containers/cna/affected/0/product
- Affected versions
- Not stated in this record
- Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
Linux
Source reference: /containers/cna/affected/1/product
- Affected versions
- Not stated in this record
- Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
Structured affected-version data
Original package identities and version rules from this source.
[
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "100e257386595b3f1865ca8a991e2ba74f9701ff",
"lessThan": "ebb840d982a612261cfc8a7687735a140c6c7024",
"versionType": "git"
},
{
"status": "affected",
"version": "100e257386595b3f1865ca8a991e2ba74f9701ff",
"lessThan": "0a25484fe22f621e151367a59a82330a22ac80bc",
"versionType": "git"
},
{
"status": "affected",
"version": "100e257386595b3f1865ca8a991e2ba74f9701ff",
"lessThan": "92090f6ff2acc81e9dd99881dcfb4f8c1bdaabd3",
"versionType": "git"
}
],
"programFiles": [
"drivers/usb/typec/altmodes/thunderbolt.c"
],
"defaultStatus": "unaffected"
},
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "6.14"
},
{
"status": "unaffected",
"version": "0",
"lessThan": "6.14",
"versionType": "semver"
},
{
"status": "unaffected",
"version": "6.18.50",
"versionType": "semver",
"lessThanOrEqual": "6.18.*"
},
{
"status": "unaffected",
"version": "7.2.4",
"versionType": "semver",
"lessThanOrEqual": "7.2.*"
},
{
"status": "unaffected",
"version": "7.3",
"versionType": "original_commit_for_fix",
"lessThanOrEqual": "*"
}
],
"programFiles": [
"drivers/usb/typec/altmodes/thunderbolt.c"
],
"defaultStatus": "affected"
}
]- Related CVEs
- CVE-2026-89737
Source reference:
/cveMetadata/cveId
Publisher severity
No explicit severity was provided.
- Event
- #35214 · Revision 1
- Added to Heist Feed
- Publisher date