159 lines
9.3 KiB
JSON
159 lines
9.3 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-2026-72446",
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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": "2026-08-09T03:40:39.930Z",
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"datePublished": "2026-08-15T05:56:56.470Z",
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"dateUpdated": "2026-08-17T05:44:17.542Z"
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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": "2026-08-17T05:44:17.542Z"
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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\nALSA: usb-audio: qcom: reject stream disable with no active interface\n\nhandle_uaudio_stream_req() resolves an interface index with\ninfo_idx_from_ifnum(), which returns -EINVAL when no interface matches.\nThe enable branch and the response: cleanup label both guard against a\nnegative index, but the disable branch does not: it forms\ninfo = &uadev[pcm_card_num].info[info_idx] and dereferences it.\n\nuadev[].info is a pointer allocated only when a stream is first enabled,\nso a negative info_idx on the disable path is unsafe in two ways:\n\n - If the card was never enabled, .info is NULL and &info[-EINVAL] is a\n wild pointer; reading info->data_ep_pipe faults (kernel oops).\n\n - If the card was enabled at least once (.info allocated) and the\n disable names an interface that does not match, &info[-EINVAL] points\n before the allocation; info->data_ep_pipe / info->sync_ep_pipe are an\n out-of-bounds slab read and, when non-zero, an out-of-bounds 4-byte\n write (both pipe fields are cleared to 0). That is memory corruption,\n not just a NULL dereference.\n\nThe request is reachable from unprivileged local userspace over\nAF_QIPCRTR. Reject a disable request with no resolved interface, matching\nthe guard the enable path already has."
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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 - Exploitation requires sending a crafted QMI stream-disable request via the AF_QIPCRTR local socket API into the kernel-registered UAUDIO QMI server; it is not reachable over the network or by plugging in USB alone.\nAC:L - An attacker can deterministically trigger the bug by sending enable=0 with a valid usb_token for a probed USB-audio card when no matching interface exists; no race or attacker-uncontrollable memory layout is required.\nPR:L - AF_QIPCRTR permits unprivileged local userspace to deliver QMI requests to the registered service without root or CAP_NET_ADMIN, and the fix commit explicitly states the path is reachable from unprivileged userspace.\nUI:N - Exploitation is a direct programmatic QMI disable request and does not require the victim to mount filesystems, open files, or perform any interactive action at trigger time.\nS:U - The flaw corrupts kernel heap memory within the same kernel security authority; it does not by itself cross a VM, IOMMU, or sandbox boundary to another security domain.\nC:H - When a card was previously enabled, a failed interface lookup yields a negative index that performs an out-of-bounds slab read of endpoint pipe fields before the allocated intf_info array, enabling kernel memory disclosure.\nI:H - The same out-of-bounds path can perform up to two conditional 4-byte writes clearing data_ep_pipe and sync_ep_pipe in adjacent slab memory, constituting exploitable kernel heap corruption rather than a benign crash.\nA:H - If the card was never enabled, info is NULL and indexing with -EINVAL dereferences a wild pointer reading data_ep_pipe, causing a kernel oops/panic and complete local denial of service."
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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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"sound/usb/qcom/qc_audio_offload.c"
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],
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"versions": [
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{
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"version": "326bbc348298ab0946c5560defe024a5f6ef28bb",
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"lessThan": "25a867aa5e67a84333fa6e5c21292c5bcff86b90",
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"status": "affected",
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"versionType": "git"
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},
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{
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"version": "326bbc348298ab0946c5560defe024a5f6ef28bb",
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"lessThan": "a22356d1f731553e99aa2707dbd38c659bdd28d8",
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"status": "affected",
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"versionType": "git"
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},
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{
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"version": "326bbc348298ab0946c5560defe024a5f6ef28bb",
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"lessThan": "bdb640be82e645e2828731648f485224d0c2587b",
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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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{
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"product": "Linux",
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"vendor": "Linux",
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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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"sound/usb/qcom/qc_audio_offload.c"
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],
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"versions": [
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{
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"version": "6.16",
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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": "6.16",
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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": "6.18.40",
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"lessThanOrEqual": "6.18.*",
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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": "7.1.5",
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"lessThanOrEqual": "7.1.*",
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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": "7.2",
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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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{
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"nodes": [
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{
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"operator": "OR",
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"negate": false,
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"cpeMatch": [
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{
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"vulnerable": true,
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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"versionStartIncluding": "6.16",
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"versionEndExcluding": "6.18.40"
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},
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{
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"vulnerable": true,
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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"versionStartIncluding": "6.16",
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"versionEndExcluding": "7.1.5"
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},
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{
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"vulnerable": true,
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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"versionStartIncluding": "6.16",
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"versionEndExcluding": "7.2"
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}
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]
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}
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]
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}
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],
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"references": [
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{
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"url": "https://git.kernel.org/stable/c/25a867aa5e67a84333fa6e5c21292c5bcff86b90"
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},
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{
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"url": "https://git.kernel.org/stable/c/a22356d1f731553e99aa2707dbd38c659bdd28d8"
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},
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{
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"url": "https://git.kernel.org/stable/c/bdb640be82e645e2828731648f485224d0c2587b"
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}
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],
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"title": "ALSA: usb-audio: qcom: reject stream disable with no active interface",
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"x_generator": {
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"engine": "bippy-1.2.0"
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}
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} |