usb: dwc3: gadget: Fix use-after-free in dwc3_gadget_free_endpoints due to race condition
In the Linux kernel, the following vulnerability has been resolved: usb: dwc3: gadget: Fix use-after-free in dwc3_gadget_free_endpoints due to race condition In dwc3_gadget_init_endpoint, &dep->nostream_work is bound with dwc3_nostream_work, and dwc3_gadget_endpoint_stream_event can queue this delayed work on system_percpu_wq when a DEPEVT_STREAM_NOSTREAM event is received. If we remove the gadget, dwc3_gadget_free_endpoints makes cleanup and the memory allocated for dep with kzalloc() is released by kfree(dep), while the delayed work mentioned above may still be pending or running. The sequence of operations that may lead to a UAF bug is as follows: CPU0 CPU1 | dwc3_thread_interrupt | dwc3_endpoint_interrupt | dwc3_gadget_endpoint_stream_event | queue_delayed_work(system_percpu_wq, | &dep->nostream_work) dwc3_gadget_free_endpoints | dwc3_free_trb_pool(dep) | list_del(&dep->endpoint.ep_list) | dwc3_debugfs_remove_endpoint_dir(dep) | kfree(dep) | // dep is freed | | dwc3_nostream_work | // use dep (use-after-free) Fix it by canceling the delayed work before kfree(dep) in dwc3_gadget_free_endpoints.
CVE-2026-89739
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-2026-89739
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": "f41ffcd656615754741f190afca00ca3c4bde9f1",
"lessThan": "5f359265f616873edf32db418bd1513fdae3ddec",
"versionType": "git"
},
{
"status": "affected",
"version": "dcfe437492e27d54f3ac491aed024da760f5c43c",
"lessThan": "448e95c0f3eaa8d99f16ccae92ab94545f14413b",
"versionType": "git"
},
{
"status": "affected",
"version": "dcfe437492e27d54f3ac491aed024da760f5c43c",
"lessThan": "93e08b13a7a30e4e78556d993720e0bc36231ec7",
"versionType": "git"
},
{
"status": "affected",
"version": "dcfe437492e27d54f3ac491aed024da760f5c43c",
"lessThan": "9c855832790cd488d87de1885974f4c37cfe7358",
"versionType": "git"
},
{
"status": "affected",
"version": "5212f8f452b87318e735ca304728f6f8fb55ff7b",
"versionType": "git"
},
{
"status": "affected",
"version": "6.6.160",
"lessThan": "6.7",
"versionType": "semver"
}
],
"programFiles": [
"drivers/usb/dwc3/gadget.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/dwc3/gadget.c"
],
"defaultStatus": "affected"
}
]- Related CVEs
- CVE-2026-89739
Source reference:
/cveMetadata/cveId
Publisher severity
No explicit severity was provided.
- Event
- #46718 · Revision 1
- Added to Heist Feed
- Publisher date