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vuln-cve/data/2024/43xxx/CVE-2024-43883.json
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{
"dataType": "CVE_RECORD",
"dataVersion": "5.2",
"cveMetadata": {
"cveId": "CVE-2024-43883",
"assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"state": "PUBLISHED",
"assignerShortName": "Linux",
"dateReserved": "2024-08-17T09:11:59.287Z",
"datePublished": "2024-08-23T13:08:10.508Z",
"dateUpdated": "2026-08-05T11:36:58.793Z"
},
"containers": {
"cna": {
"providerMetadata": {
"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"shortName": "Linux",
"dateUpdated": "2026-08-05T11:36:58.793Z"
},
"descriptions": [
{
"lang": "en",
"value": "In the Linux kernel, the following vulnerability has been resolved:\n\nusb: vhci-hcd: Do not drop references before new references are gained\n\nAt a few places the driver carries stale pointers\nto references that can still be used. Make sure that does not happen.\nThis strictly speaking closes ZDI-CAN-22273, though there may be\nsimilar races in the driver."
}
],
"metrics": [
{
"cvssV3_1": {
"version": "3.1",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
"baseScore": 9.8,
"baseSeverity": "CRITICAL"
},
"scenarios": [
{
"lang": "en",
"value": "AV:N - vhci-hcd is a virtual host controller whose transport is an unauthenticated TCP socket, not a physical port; `vhci_rx_pdu()` processes attacker-supplied PDUs from the remote USB/IP peer and converts a malformed command or short read directly into `VDEV_EVENT_ERROR_TCP` → `vhci_device_reset()`, the vulnerable put path. A malicious or compromised USB/IP server (or an on-path attacker, since USB/IP has no integrity protection) drives the bug entirely over the network.\nAC:L - The attacker controls both sides of the race — it forces unlimited re-enumerations by failing URBs (usb-storage error recovery and hub retry loops re-issue SET_ADDRESS/GET_DESCRIPTOR to devnum 0) and fires the reset event on demand with a single bad PDU byte. It also observes the GET_DESCRIPTOR-to-device-0 CMD_SUBMIT on the wire, so it knows precisely when the put/assign window opens, and can retry indefinitely.\nPR:N - The USB/IP client performs no authentication on received PDUs — `vhci_rx_loop()` just reads and dispatches whatever the peer sends, so the remote attacker needs no credentials on the target. Even in the local framing, `USBDEVFS_RESET` is gated only on `FMODE_WRITE` of the usbfs node with no capability check.\nUI:N - In the targeted deployments (thin clients, VDI USB redirection, device farms, industrial gateways) the attachment is established automatically by a service, and the attacker triggers both re-enumeration and the reset event itself during normal operation. No victim action is required at attack time.\nS:U - The use-after-free corrupts kernel heap memory within the same kernel security authority; there is no crossing of a VM, IOMMU, or sandbox boundary.\nC:H - The double `usb_put_dev()` frees a live `struct usb_device` while `vdev->udev` and in-flight URBs still reference it, and the remote controls RET_SUBMIT buffer contents/sizes for reliable slab reclaim, yielding an arbitrary read primitive. `port_show_vhci()` additionally prints `dev_name()` from the freed object into `/sys/devices/platform/vhci_hcd.0/status`, directly leaking reclaimed heap content.\nI:H - After the premature free, `usb_get_dev()` performs a refcount increment into freed memory (a write at a controlled offset), and subsequent dereferences of `udev->dev.driver`, `udev->bus`, and the kobject release path give function-pointer control. This is a classic UAF exploitable for heap corruption and control-flow hijack to kernel code execution.\nA:H - The reference-count underflow and stale-pointer dereference produce refcount_t warnings, oopses, and panics, and `vdev->udev` can also be observed as NULL/freed by concurrent readers. The remote peer can trigger this repeatedly, making a reliable kernel crash trivial."
}
]
}
],
"affected": [
{
"product": "Linux",
"vendor": "Linux",
"defaultStatus": "unaffected",
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"programFiles": [
"drivers/usb/usbip/vhci_hcd.c"
],
"versions": [
{
"version": "7606ee8aa33287dd3e6eb44c78541b87a413a325",
"lessThan": "5a3c473b28ae1c1f7c4dc129e30cb19ae6e96f89",
"status": "affected",
"versionType": "git"
},
{
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"status": "affected",
"versionType": "git"
},
{
"version": "7606ee8aa33287dd3e6eb44c78541b87a413a325",
"lessThan": "4dacdb9720aaab10b6be121eae55820174d97174",
"status": "affected",
"versionType": "git"
},
{
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"lessThan": "e8c1e606dab8c56cf074b43b98d0805de7322ba2",
"status": "affected",
"versionType": "git"
},
{
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"lessThan": "585e6bc7d0a9bf73a8be3d3fb34e86b90cc61a14",
"status": "affected",
"versionType": "git"
},
{
"version": "7606ee8aa33287dd3e6eb44c78541b87a413a325",
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"status": "affected",
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},
{
"version": "7606ee8aa33287dd3e6eb44c78541b87a413a325",
"lessThan": "c3d0857b7fc2c49f68f89128a5440176089a8f54",
"status": "affected",
"versionType": "git"
},
{
"version": "7606ee8aa33287dd3e6eb44c78541b87a413a325",
"lessThan": "afdcfd3d6fcdeca2735ca8d994c5f2d24a368f0a",
"status": "affected",
"versionType": "git"
},
{
"version": "96ea4801d2035f89fc4ec4a67f49a18c35cb6715",
"status": "affected",
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},
{
"version": "075b4e6a982d38121250c090f7b9294314ac1b19",
"status": "affected",
"versionType": "git"
},
{
"version": "436e52f1a628233f080605dd736594df250897ca",
"status": "affected",
"versionType": "git"
},
{
"version": "1c8d316294916da7e2a2f1f178ca3f3bd6d7b531",
"status": "affected",
"versionType": "git"
},
{
"version": "927c3fa44e24300eb827ab9f9dacce6dff9c9bb7",
"status": "affected",
"versionType": "git"
},
{
"version": "2.6.32.30",
"lessThan": "2.6.33",
"status": "affected",
"versionType": "semver"
},
{
"version": "2.6.33.8",
"lessThan": "2.6.34",
"status": "affected",
"versionType": "semver"
},
{
"version": "2.6.34.10",
"lessThan": "2.6.35",
"status": "affected",
"versionType": "semver"
},
{
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"lessThan": "2.6.36",
"status": "affected",
"versionType": "semver"
},
{
"version": "2.6.37.3",
"lessThan": "2.6.38",
"status": "affected",
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}
]
},
{
"product": "Linux",
"vendor": "Linux",
"defaultStatus": "affected",
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"programFiles": [
"drivers/usb/usbip/vhci_hcd.c"
],
"versions": [
{
"version": "2.6.38",
"status": "affected"
},
{
"version": "0",
"lessThan": "2.6.38",
"status": "unaffected",
"versionType": "semver"
},
{
"version": "4.19.320",
"lessThanOrEqual": "4.19.*",
"status": "unaffected",
"versionType": "semver"
},
{
"version": "5.4.282",
"lessThanOrEqual": "5.4.*",
"status": "unaffected",
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},
{
"version": "5.10.224",
"lessThanOrEqual": "5.10.*",
"status": "unaffected",
"versionType": "semver"
},
{
"version": "5.15.165",
"lessThanOrEqual": "5.15.*",
"status": "unaffected",
"versionType": "semver"
},
{
"version": "6.1.105",
"lessThanOrEqual": "6.1.*",
"status": "unaffected",
"versionType": "semver"
},
{
"version": "6.6.46",
"lessThanOrEqual": "6.6.*",
"status": "unaffected",
"versionType": "semver"
},
{
"version": "6.10.5",
"lessThanOrEqual": "6.10.*",
"status": "unaffected",
"versionType": "semver"
},
{
"version": "6.11",
"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": "2.6.38",
"versionEndExcluding": "4.19.320"
},
{
"vulnerable": true,
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionStartIncluding": "2.6.38",
"versionEndExcluding": "5.4.282"
},
{
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionStartIncluding": "2.6.38",
"versionEndExcluding": "5.10.224"
},
{
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionStartIncluding": "2.6.38",
"versionEndExcluding": "5.15.165"
},
{
"vulnerable": true,
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionStartIncluding": "2.6.38",
"versionEndExcluding": "6.1.105"
},
{
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionStartIncluding": "2.6.38",
"versionEndExcluding": "6.6.46"
},
{
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionStartIncluding": "2.6.38",
"versionEndExcluding": "6.10.5"
},
{
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionStartIncluding": "2.6.38",
"versionEndExcluding": "6.11"
},
{
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionStartIncluding": "2.6.32.30"
},
{
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionStartIncluding": "2.6.33.8"
},
{
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionStartIncluding": "2.6.34.10"
},
{
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionStartIncluding": "2.6.35.12"
},
{
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionStartIncluding": "2.6.37.3"
}
]
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}
],
"references": [
{
"url": "https://git.kernel.org/stable/c/5a3c473b28ae1c1f7c4dc129e30cb19ae6e96f89"
},
{
"url": "https://git.kernel.org/stable/c/9c3746ce8d8fcb3a2405644fc0eec7fc5312de80"
},
{
"url": "https://git.kernel.org/stable/c/4dacdb9720aaab10b6be121eae55820174d97174"
},
{
"url": "https://git.kernel.org/stable/c/e8c1e606dab8c56cf074b43b98d0805de7322ba2"
},
{
"url": "https://git.kernel.org/stable/c/585e6bc7d0a9bf73a8be3d3fb34e86b90cc61a14"
},
{
"url": "https://git.kernel.org/stable/c/128e82e41cf7d74a562726c1587d9d2ede1a0a37"
},
{
"url": "https://git.kernel.org/stable/c/c3d0857b7fc2c49f68f89128a5440176089a8f54"
},
{
"url": "https://git.kernel.org/stable/c/afdcfd3d6fcdeca2735ca8d994c5f2d24a368f0a"
}
],
"title": "usb: vhci-hcd: Do not drop references before new references are gained",
"x_generator": {
"engine": "bippy-1.2.0"
}
},
"adp": [
{
"metrics": [
{
"other": {
"type": "ssvc",
"content": {
"id": "CVE-2024-43883",
"role": "CISA Coordinator",
"options": [
{
"Exploitation": "none"
},
{
"Automatable": "no"
},
{
"Technical Impact": "partial"
}
],
"version": "2.0.3",
"timestamp": "2024-09-10T15:32:14.861945Z"
}
}
}
],
"title": "CISA ADP Vulnrichment",
"providerMetadata": {
"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"shortName": "CISA-ADP",
"dateUpdated": "2024-09-12T17:33:09.242Z"
}
},
{
"title": "CVE Program Container",
"references": [
{
"url": "https://lists.debian.org/debian-lts-announce/2025/01/msg00001.html"
},
{
"url": "https://lists.debian.org/debian-lts-announce/2024/10/msg00003.html"
}
],
"providerMetadata": {
"orgId": "af854a3a-2127-422b-91ae-364da2661108",
"shortName": "CVE",
"dateUpdated": "2025-11-03T22:06:39.422Z"
}
}
]
}
}
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