usb: gadget: uvc: fix dangling pointers in uvc_function_bind() and uvc_function_unbind()
In the Linux kernel, the following vulnerability has been resolved: usb: gadget: uvc: fix dangling pointers in uvc_function_bind() and uvc_function_unbind() In uvc_function_bind() error path, we use usb_ep_free_request which uses uvc->control_req but does not set it to NULL afterwards. Thus, uvc->control_req is a dangling pointer causing a UAF. Also we do not set the uvc->control_buf pointer to NULL after freeing it, which is another dangling pointer. Fix it by setting uvc->control_req to NULL after we run usb_ep_free_request() and uvc->control_buf to NULL after kfree. Do the same for uvc_function_unbind().
CVE-2026-89733
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-2026-89733
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": "0f9df939385527049c8062a099fbfa1479fe7ce0",
"lessThan": "ddb1b0d5d858584ed0d3a5aaa042ee693998c7e2",
"versionType": "git"
},
{
"status": "affected",
"version": "0f9df939385527049c8062a099fbfa1479fe7ce0",
"lessThan": "85dd5e8bd6776d02854f2847d83429f1f712e99c",
"versionType": "git"
},
{
"status": "affected",
"version": "0f9df939385527049c8062a099fbfa1479fe7ce0",
"lessThan": "502a7f5b79b7ba751988789e982924f8f496129f",
"versionType": "git"
},
{
"status": "affected",
"version": "0f9df939385527049c8062a099fbfa1479fe7ce0",
"lessThan": "bec7708eb3b5295d12e931db24381b7c94c72953",
"versionType": "git"
},
{
"status": "affected",
"version": "0f9df939385527049c8062a099fbfa1479fe7ce0",
"lessThan": "8e88ed8a374de67270d38689f2a81018909cafbb",
"versionType": "git"
},
{
"status": "affected",
"version": "0f9df939385527049c8062a099fbfa1479fe7ce0",
"lessThan": "9897b7da8c0ad8356c1b8649379fcb5a689462cb",
"versionType": "git"
},
{
"status": "affected",
"version": "0f9df939385527049c8062a099fbfa1479fe7ce0",
"lessThan": "38f822ddce9355893d734279a26ddec45182197e",
"versionType": "git"
},
{
"status": "affected",
"version": "0f9df939385527049c8062a099fbfa1479fe7ce0",
"lessThan": "bdab5605259ba5d6ff927c1a85cc83eb3ecfdacc",
"versionType": "git"
},
{
"status": "affected",
"version": "1efa8a5aac93d9e67075995d7d4902b57ce184f7",
"versionType": "git"
},
{
"status": "affected",
"version": "e7a4b0efe62e56a0acc81d16091c6efc2a282be8",
"versionType": "git"
},
{
"status": "affected",
"version": "065f5561a20659cf17aae5f72b32b5c2695c8e00",
"versionType": "git"
},
{
"status": "affected",
"version": "3.2.36",
"lessThan": "3.3",
"versionType": "semver"
},
{
"status": "affected",
"version": "3.4.25",
"lessThan": "3.5",
"versionType": "semver"
},
{
"status": "affected",
"version": "3.7.2",
"lessThan": "3.8",
"versionType": "semver"
}
],
"programFiles": [
"drivers/usb/gadget/function/f_uvc.c"
],
"defaultStatus": "unaffected"
},
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "3.8"
},
{
"status": "unaffected",
"version": "0",
"lessThan": "3.8",
"versionType": "semver"
},
{
"status": "unaffected",
"version": "5.10.270",
"versionType": "semver",
"lessThanOrEqual": "5.10.*"
},
{
"status": "unaffected",
"version": "5.15.221",
"versionType": "semver",
"lessThanOrEqual": "5.15.*"
},
{
"status": "unaffected",
"version": "6.1.188",
"versionType": "semver",
"lessThanOrEqual": "6.1.*"
},
{
"status": "unaffected",
"version": "6.6.157",
"versionType": "semver",
"lessThanOrEqual": "6.6.*"
},
{
"status": "unaffected",
"version": "6.12.109",
"versionType": "semver",
"lessThanOrEqual": "6.12.*"
},
{
"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/gadget/function/f_uvc.c"
],
"defaultStatus": "affected"
}
]- Related CVEs
- CVE-2026-89733
Source reference:
/cveMetadata/cveId
Publisher severity
high
Source reference: /containers/cna/metrics
- Event
- #35210 · Revision 1
- Added to Heist Feed
- Publisher date