CVE-2026-80583 (GCVE-0-2026-80583)
Vulnerability from cvelistv5
Published
2026-08-26 14:37
Modified
2026-08-27 12:40
Severity ?
VLAI Severity ?
EPSS score ?
Summary
In the Linux kernel, the following vulnerability has been resolved:
ASoC: codecs: lpass-tx-macro: Fix enum kcontrol accesses
The "DEC0 MODE" to "DEC7 MODE" controls are enumerated, but
tx_macro_dec_mode_get() and tx_macro_dec_mode_put() access their
value through ucontrol->value.integer.value[0] (a long) instead of
ucontrol->value.enumerated.item[0] (an unsigned int).
This same pattern was fixed in the sibling drivers by
commit bcfe5f76cc40 ("ASoC: codecs: rx-macro: fix accessing array
out of bounds for enum type") and
commit 0ea5eff7c606 ("ASoC: codecs: va-macro: fix accessing array
out of bounds for enum type"), but tx-macro was missed.
On 64-bit kernels built with CONFIG_SND_CTL_DEBUG, the elem value
sanity check catches the 4 bytes written past the enumerated item
and every read of these controls fails with -EINVAL:
snd-sm8250 sound: control 2:0:0:DEC0 MODE:0: access overflow
References
Impacted products
| Vendor | Product | Version | ||
|---|---|---|---|---|
| Linux | Linux |
Version: c39667ddcfc516fee084e449179d54430a558298 Version: c39667ddcfc516fee084e449179d54430a558298 Version: c39667ddcfc516fee084e449179d54430a558298 Version: c39667ddcfc516fee084e449179d54430a558298 Version: c39667ddcfc516fee084e449179d54430a558298 Version: c39667ddcfc516fee084e449179d54430a558298 Version: c39667ddcfc516fee084e449179d54430a558298 |
||
{
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"programFiles": [
"sound/soc/codecs/lpass-tx-macro.c"
],
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{
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"status": "unaffected",
"version": "7.1.10",
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{
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"version": "7.2",
"versionType": "original_commit_for_fix"
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}
],
"cpeApplicability": [
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"descriptions": [
{
"lang": "en",
"value": "In the Linux kernel, the following vulnerability has been resolved:\n\nASoC: codecs: lpass-tx-macro: Fix enum kcontrol accesses\n\nThe \"DEC0 MODE\" to \"DEC7 MODE\" controls are enumerated, but\ntx_macro_dec_mode_get() and tx_macro_dec_mode_put() access their\nvalue through ucontrol-\u003evalue.integer.value[0] (a long) instead of\nucontrol-\u003evalue.enumerated.item[0] (an unsigned int).\n\nThis same pattern was fixed in the sibling drivers by\ncommit bcfe5f76cc40 (\"ASoC: codecs: rx-macro: fix accessing array\nout of bounds for enum type\") and\ncommit 0ea5eff7c606 (\"ASoC: codecs: va-macro: fix accessing array\nout of bounds for enum type\"), but tx-macro was missed.\n\nOn 64-bit kernels built with CONFIG_SND_CTL_DEBUG, the elem value\nsanity check catches the 4 bytes written past the enumerated item\nand every read of these controls fails with -EINVAL:\n\n snd-sm8250 sound: control 2:0:0:DEC0 MODE:0: access overflow"
}
],
"metrics": [
{
"cvssV3_1": {
"baseScore": 7.8,
"baseSeverity": "HIGH",
"vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
"version": "3.1"
},
"scenarios": [
{
"lang": "en",
"value": "AV:L - Exploitation requires local SNDRV_CTL_IOCTL_ELEM_READ or SNDRV_CTL_IOCTL_ELEM_WRITE on /dev/snd/controlC* through snd_ctl_ioctl() to tx_macro_dec_mode_get/put(); the Qualcomm LPASS TX macro audio codec driver has no network, Bluetooth, or physical-input attack path.\nAC:L - A single ioctl targeting DEC0-7 MODE deterministically triggers the 8-byte integer access against a 4-byte enumerated field on 64-bit kernels; the attacker controls both sides with no race, timing, or memory-layout dependency.\nPR:L - snd_ctl_open() performs no capability check; exploitation needs only local access to /dev/snd/controlC*, typically granted to the audio group on Qualcomm sc8250/sc8280 Chromebooks and Linux dev boards where this driver is present, not real root.\nUI:N - Once the attacker has ALSA control-device access they issue elem read/write ioctls themselves to DEC MODE controls; no separate victim action such as plugging hardware or opening a file is required.\nS:U - The out-of-bounds ctl-value access and resulting microphone ADC mode corruption remain within the host kernel and Qualcomm audio subsystem; there is no crossing of VM, container, or IOMMU security boundaries.\nC:H - tx_macro_dec_mode_put() reads ucontrol-\u003evalue.integer.value[0] (8 bytes) for ENUM controls, performing a 4-byte out-of-bounds read past enumerated.item[0]; per kernel CVSS guidance out-of-bounds reads are scored High even when bounded.\nI:H - tx_macro_dec_mode_get() writes 8 bytes via integer.value[0], overflowing enumerated.item[0] by 4 bytes in kernel memory; put stores values into tx-\u003edec_mode[] that program CDC_TXn_ADC_MODE on phone/Chromebook microphones, constituting memory corruption scored High.\nA:H - With CONFIG_SND_CTL_DEBUG every DEC0-7 MODE read fails with -EINVAL (access overflow), denying microphone ADC queries; on production 64-bit aarch64 builds the 4-byte union overrun corrupts ctl values and can break Qualcomm LPASS TX audio capture availability."
}
]
}
],
"providerMetadata": {
"dateUpdated": "2026-08-27T12:40:21.902Z",
"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"shortName": "Linux"
},
"references": [
{
"url": "https://git.kernel.org/stable/c/dbc81b518f6936131bfd858be71cd4295136809c"
},
{
"url": "https://git.kernel.org/stable/c/f84f2c81d792cf1e65571108a3bdd2c29e09e995"
},
{
"url": "https://git.kernel.org/stable/c/48b76879f5bfc8584b99052510ac645c6ade8d2b"
},
{
"url": "https://git.kernel.org/stable/c/2ed3601e9db08fbdb071bd3d7bd8f115d6d871b0"
},
{
"url": "https://git.kernel.org/stable/c/b6baab796d11fb84c0e9444ffca91af5eab22c25"
},
{
"url": "https://git.kernel.org/stable/c/3ee3c26ceee562079596abc9bc3307dd56dab4ed"
},
{
"url": "https://git.kernel.org/stable/c/1ba381759e45d5d0442452cfa5c42e836191a568"
}
],
"title": "ASoC: codecs: lpass-tx-macro: Fix enum kcontrol accesses",
"x_generator": {
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}
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"cveMetadata": {
"assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"assignerShortName": "Linux",
"cveId": "CVE-2026-80583",
"datePublished": "2026-08-26T14:37:39.704Z",
"dateReserved": "2026-08-26T14:34:25.769Z",
"dateUpdated": "2026-08-27T12:40:21.902Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.2"
}
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Sightings
| Author | Source | Type | Date |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or seen somewhere by the user.
- Confirmed: The vulnerability is confirmed from an analyst perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: This vulnerability was exploited and seen by the user reporting the sighting.
- Patched: This vulnerability was successfully patched by the user reporting the sighting.
- Not exploited: This vulnerability was not exploited or seen by the user reporting the sighting.
- Not confirmed: The user expresses doubt about the veracity of the vulnerability.
- Not patched: This vulnerability was not successfully patched by the user reporting the sighting.
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