276 lines
14 KiB
JSON
276 lines
14 KiB
JSON
{
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"dataType": "CVE_RECORD",
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"dataVersion": "5.2",
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"cveMetadata": {
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"cveId": "CVE-2024-38628",
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"assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
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"state": "PUBLISHED",
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"assignerShortName": "Linux",
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"dateReserved": "2024-06-18T19:36:34.946Z",
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"datePublished": "2024-06-21T10:18:19.558Z",
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"dateUpdated": "2026-08-05T11:33:16.721Z"
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},
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"containers": {
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"cna": {
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"providerMetadata": {
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"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
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"shortName": "Linux",
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"dateUpdated": "2026-08-05T11:33:16.721Z"
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},
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"descriptions": [
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{
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"lang": "en",
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"value": "In the Linux kernel, the following vulnerability has been resolved:\n\nusb: gadget: u_audio: Fix race condition use of controls after free during gadget unbind.\n\nHang on to the control IDs instead of pointers since those are correctly\nhandled with locks."
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}
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],
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"metrics": [
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{
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"cvssV3_1": {
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"version": "3.1",
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"vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
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"baseScore": 7.8,
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"baseSeverity": "HIGH"
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},
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"scenarios": [
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{
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"lang": "en",
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"value": "AV:L - The free side of the race is driven by local gadget teardown (`configfs` UDC unbind / `afunc_unbind` → `g_audio_cleanup`) and by the userspace close of the ALSA control fd that gates the deferred `snd_card_free_when_closed()`, while the use side is reachable locally through `dummy_hcd`/`raw-gadget` acting as an in-software USB host. This matches established kernel.org scoring for USB gadget bind/unbind use-after-frees (e.g. CVE-2025-38555, CVE-2026-63894).\nAC:L - The attacker controls both sides of the race — the moment of the free (unbind plus closing the last `/dev/snd/control*` descriptor, which is what actually triggers `snd_card_do_free()` and releases the kcontrols) and the moment of the use (UAC volume/mute `SET_CUR` transfers, altsetting changes, or bus suspend) — so it can be retried and won reliably.\nPR:L - An unprivileged local user can hold and release the ALSA control descriptor to pin the exact instant the kcontrols are freed and can drive the USB-side control transfers via the loopback host stack, consistent with the PR:L assigned to other gadget teardown use-after-frees reached through the same configfs path.\nUI:N - The attacker performs every step itself — unbind, fd close, and the UAC control traffic — with no action required from any other user.\nS:U - The use-after-free corrupts kernel heap memory within the same kernel security authority; no VM, IOMMU, or sandbox boundary is crossed.\nC:H - The stale `snd_kcontrol` is read after free and its `id` field (including the 64-byte name) is copied into a `snd_ctl_event` delivered to userspace readers of the control device, leaking groomable freed slab contents; a controlled use-after-free read of this kind is a general kernel memory disclosure primitive.\nI:H - `set_active()` and `u_audio_set_volume/mute()` acquire `prm->lock` and write `prm->active`/`volume`/`mute` into the already-`kfree()`d `snd_uac_chip`, and `snd_ctl_notify()` performs list insertion on the freed `snd_card`, giving write-after-free and list-corruption primitives that can be leveraged for control-flow hijacking.\nA:H - Use of freed kcontrol, `snd_card`, and `snd_uac_chip` objects — including spinlock operations and list walks on freed memory — reliably produces KASAN splats, list corruption, and kernel panics."
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}
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]
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}
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],
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"affected": [
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{
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"product": "Linux",
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"vendor": "Linux",
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"defaultStatus": "unaffected",
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"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
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"programFiles": [
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"drivers/usb/gadget/function/u_audio.c"
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],
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"versions": [
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{
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"version": "02de698ca8123782c0c6fb8ed99080e2f032b0d2",
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"lessThan": "89e66809684485590ea0b32c3178e42cba36ac09",
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"status": "affected",
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"versionType": "git"
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},
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{
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{
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"defaultStatus": "affected",
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"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
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"programFiles": [
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"drivers/usb/gadget/function/u_audio.c"
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],
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"versions": [
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{
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"version": "5.15",
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"status": "affected"
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},
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{
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"version": "0",
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"lessThan": "5.15",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "6.1.93",
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"lessThanOrEqual": "6.1.*",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "6.6.33",
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"lessThanOrEqual": "6.6.*",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "6.9.4",
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"lessThanOrEqual": "6.9.*",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "6.10",
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"lessThanOrEqual": "*",
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"status": "unaffected",
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"versionType": "original_commit_for_fix"
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}
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]
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}
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],
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"cpeApplicability": [
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"nodes": [
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"operator": "OR",
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"negate": false,
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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"versionStartIncluding": "5.15",
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"references": [
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{
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"url": "https://git.kernel.org/stable/c/89e66809684485590ea0b32c3178e42cba36ac09"
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},
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{
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"url": "https://git.kernel.org/stable/c/453d3fa9266e53f85377b911c19b9a4563fa88c0"
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{
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"url": "https://git.kernel.org/stable/c/bea73b58ab67fe581037ad9cdb93c2557590c068"
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{
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"url": "https://git.kernel.org/stable/c/1b739388aa3f8dfb63a9fca777e6dfa6912d0464"
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}
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],
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"title": "usb: gadget: u_audio: Fix race condition use of controls after free during gadget unbind.",
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"x_generator": {
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"engine": "bippy-1.2.0"
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{
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{
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"descriptions": [
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{
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"type": "CWE",
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"cweId": "CWE-362",
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"lang": "en",
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"description": "CWE-362 Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')"
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}
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}
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{
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"attackVector": "LOCAL",
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"baseSeverity": "MEDIUM",
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"vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
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"integrityImpact": "NONE",
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"userInteraction": "NONE",
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"attackComplexity": "LOW",
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"availabilityImpact": "HIGH",
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{
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"type": "ssvc",
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"content": {
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"timestamp": "2024-06-24T15:20:09.528911Z",
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"id": "CVE-2024-38628",
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"options": [
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{
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"Exploitation": "none"
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{
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{
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"Technical Impact": "partial"
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"version": "2.0.3"
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"title": "CISA ADP Vulnrichment",
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"shortName": "CISA-ADP",
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"dateUpdated": "2024-11-05T16:32:35.156Z"
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"dateUpdated": "2024-08-02T04:12:26.065Z"
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"title": "CVE Program Container",
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"references": [
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