VULN/vuln-cve
1
0 Fork 0
Code Pull Requests Actions Activity
Files
c1444140e59c61ba154436ea0cd6284d8a97c3f0
vuln-cve/data/2026/89xxx/CVE-2026-89733.json
T

312 lines
16 KiB
JSON
Raw Blame History

{
"dataType": "CVE_RECORD",
"dataVersion": "5.2",
"cveMetadata": {
"cveId": "CVE-2026-89733",
"assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"state": "PUBLISHED",
"assignerShortName": "Linux",
"dateReserved": "2026-09-11T19:38:34.760Z",
"datePublished": "2026-09-11T19:46:42.613Z",
"dateUpdated": "2026-10-19T08:51:46.538Z"
},
"containers": {
"cna": {
"providerMetadata": {
"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"shortName": "Linux",
"dateUpdated": "2026-10-19T08:51:46.538Z"
},
"descriptions": [
{
"lang": "en",
"value": "In the Linux kernel, the following vulnerability has been resolved:\n\nusb: gadget: uvc: fix dangling pointers in uvc_function_bind() and uvc_function_unbind()\n\nIn uvc_function_bind() error path, we use usb_ep_free_request which\nuses uvc->control_req but does not set it to NULL afterwards. Thus,\nuvc->control_req is a dangling pointer causing a UAF. Also we do not set\nthe uvc->control_buf pointer to NULL after freeing it, which is another\ndangling pointer. Fix it by setting uvc->control_req to NULL after we run\nusb_ep_free_request() and uvc->control_buf to NULL after kfree. Do the\nsame for uvc_function_unbind()."
}
],
"metrics": [
{
"cvssV3_1": {
"version": "3.1",
"vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
"baseScore": 7.8,
"baseSeverity": "HIGH"
},
"scenarios": [
{
"lang": "en",
"value": "AV:L - The UAF is reached by local writes to /sys/kernel/config/usb_gadget/<g>/UDC that drive uvc_function_bind()/uvc_function_unbind(); no USB host traffic or physical attachment is required, matching prior gadget bind dangling-pointer scores and being higher severity than Physical.\nAC:L - The attacker controls the successful bind, the unbind that leaves uvc->control_req dangling, and a later bind that fails before reallocating (e.g. exhausting usb_ep_autoconfig(), as in the syzkaller \"Unable to allocate streaming EP\" crash), so the error path double-frees the usb_request with no race.\nPR:L - gadget_dev_desc_UDC_store() and uvc_function_bind() perform no capability check; access is gated only by configfs permissions, and Android/embedded USB gadget HALs routinely delegate /sys/kernel/config/usb_gadget to non-root system or daemon accounts.\nUI:N - The attacker performs the configfs UDC bind/unbind writes themselves; no victim action, cable plug, or other-user interaction is required.\nS:U - The dangling usb_request double-free corrupts kernel heap within the same kernel security authority and does not cross a VM, IOMMU, or sandbox boundary.\nC:H - usb_ep_free_request() on the stale control_req is a use-after-free of a usb_request slab object; an attacker who sprays that cache controls the freed object and can convert the UAF into kernel memory disclosure.\nI:H - The same stale pointer is a double-free through ep->ops->free_request, yielding classic heap-corruption primitives (object overlap and arbitrary free) that can be leveraged into arbitrary write and control-flow hijack.\nA:H - The syzkaller report is a KASAN slab-use-after-free oops in usb_ep_free_request() on the bind error path, and the double free independently panics the kernel, which the attacker can retrigger via configfs."
}
]
}
],
"affected": [
{
"product": "Linux",
"vendor": "Linux",
"defaultStatus": "unaffected",
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"programFiles": [
"drivers/usb/gadget/function/f_uvc.c"
],
"versions": [
{
"version": "0f9df939385527049c8062a099fbfa1479fe7ce0",
"lessThan": "ddb1b0d5d858584ed0d3a5aaa042ee693998c7e2",
"status": "affected",
"versionType": "git"
},
{
"version": "0f9df939385527049c8062a099fbfa1479fe7ce0",
"lessThan": "85dd5e8bd6776d02854f2847d83429f1f712e99c",
"status": "affected",
"versionType": "git"
},
{
"version": "0f9df939385527049c8062a099fbfa1479fe7ce0",
"lessThan": "502a7f5b79b7ba751988789e982924f8f496129f",
"status": "affected",
"versionType": "git"
},
{
"version": "0f9df939385527049c8062a099fbfa1479fe7ce0",
"lessThan": "bec7708eb3b5295d12e931db24381b7c94c72953",
"status": "affected",
"versionType": "git"
},
{
"version": "0f9df939385527049c8062a099fbfa1479fe7ce0",
"lessThan": "8e88ed8a374de67270d38689f2a81018909cafbb",
"status": "affected",
"versionType": "git"
},
{
"version": "0f9df939385527049c8062a099fbfa1479fe7ce0",
"lessThan": "9897b7da8c0ad8356c1b8649379fcb5a689462cb",
"status": "affected",
"versionType": "git"
},
{
"version": "0f9df939385527049c8062a099fbfa1479fe7ce0",
"lessThan": "38f822ddce9355893d734279a26ddec45182197e",
"status": "affected",
"versionType": "git"
},
{
"version": "0f9df939385527049c8062a099fbfa1479fe7ce0",
"lessThan": "bdab5605259ba5d6ff927c1a85cc83eb3ecfdacc",
"status": "affected",
"versionType": "git"
},
{
"version": "1efa8a5aac93d9e67075995d7d4902b57ce184f7",
"status": "affected",
"versionType": "git"
},
{
"version": "e7a4b0efe62e56a0acc81d16091c6efc2a282be8",
"status": "affected",
"versionType": "git"
},
{
"version": "065f5561a20659cf17aae5f72b32b5c2695c8e00",
"status": "affected",
"versionType": "git"
},
{
"version": "3.2.36",
"lessThan": "3.3",
"status": "affected",
"versionType": "semver"
},
{
"version": "3.4.25",
"lessThan": "3.5",
"status": "affected",
"versionType": "semver"
},
{
"version": "3.7.2",
"lessThan": "3.8",
"status": "affected",
"versionType": "semver"
}
]
},
{
"product": "Linux",
"vendor": "Linux",
"defaultStatus": "affected",
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"programFiles": [
"drivers/usb/gadget/function/f_uvc.c"
],
"versions": [
{
"version": "3.8",
"status": "affected"
},
{
"version": "0",
"lessThan": "3.8",
"status": "unaffected",
"versionType": "semver"
},
{
"version": "5.10.270",
"lessThanOrEqual": "5.10.*",
"status": "unaffected",
"versionType": "semver"
},
{
"version": "5.15.221",
"lessThanOrEqual": "5.15.*",
"status": "unaffected",
"versionType": "semver"
},
{
"version": "6.1.188",
"lessThanOrEqual": "6.1.*",
"status": "unaffected",
"versionType": "semver"
},
{
"version": "6.6.157",
"lessThanOrEqual": "6.6.*",
"status": "unaffected",
"versionType": "semver"
},
{
"version": "6.12.109",
"lessThanOrEqual": "6.12.*",
"status": "unaffected",
"versionType": "semver"
},
{
"version": "6.18.50",
"lessThanOrEqual": "6.18.*",
"status": "unaffected",
"versionType": "semver"
},
{
"version": "7.2.4",
"lessThanOrEqual": "7.2.*",
"status": "unaffected",
"versionType": "semver"
},
{
"version": "7.3",
"lessThanOrEqual": "*",
"status": "unaffected",
"versionType": "original_commit_for_fix"
}
]
}
],
"cpeApplicability": [
{
"nodes": [
{
"operator": "OR",
"negate": false,
"cpeMatch": [
{
"vulnerable": true,
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionStartIncluding": "3.8",
"versionEndExcluding": "5.10.270"
},
{
"vulnerable": true,
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionStartIncluding": "3.8",
"versionEndExcluding": "5.15.221"
},
{
"vulnerable": true,
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionStartIncluding": "3.8",
"versionEndExcluding": "6.1.188"
},
{
"vulnerable": true,
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionStartIncluding": "3.8",
"versionEndExcluding": "6.6.157"
},
{
"vulnerable": true,
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionStartIncluding": "3.8",
"versionEndExcluding": "6.12.109"
},
{
"vulnerable": true,
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionStartIncluding": "3.8",
"versionEndExcluding": "6.18.50"
},
{
"vulnerable": true,
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionStartIncluding": "3.8",
"versionEndExcluding": "7.2.4"
},
{
"vulnerable": true,
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionStartIncluding": "3.8",
"versionEndExcluding": "7.3"
},
{
"vulnerable": true,
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionStartIncluding": "3.2.36"
},
{
"vulnerable": true,
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionStartIncluding": "3.4.25"
},
{
"vulnerable": true,
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionStartIncluding": "3.7.2"
}
]
}
]
}
],
"references": [
{
"url": "https://git.kernel.org/stable/c/ddb1b0d5d858584ed0d3a5aaa042ee693998c7e2"
},
{
"url": "https://git.kernel.org/stable/c/85dd5e8bd6776d02854f2847d83429f1f712e99c"
},
{
"url": "https://git.kernel.org/stable/c/502a7f5b79b7ba751988789e982924f8f496129f"
},
{
"url": "https://git.kernel.org/stable/c/bec7708eb3b5295d12e931db24381b7c94c72953"
},
{
"url": "https://git.kernel.org/stable/c/8e88ed8a374de67270d38689f2a81018909cafbb"
},
{
"url": "https://git.kernel.org/stable/c/9897b7da8c0ad8356c1b8649379fcb5a689462cb"
},
{
"url": "https://git.kernel.org/stable/c/38f822ddce9355893d734279a26ddec45182197e"
},
{
"url": "https://git.kernel.org/stable/c/bdab5605259ba5d6ff927c1a85cc83eb3ecfdacc"
}
],
"title": "usb: gadget: uvc: fix dangling pointers in uvc_function_bind() and uvc_function_unbind()",
"x_generator": {
"engine": "bippy-1.2.0"
}
}
}
}
View Git Blame Copy Permalink