CVE-2026-80583 (GCVE-0-2026-80583)

Vulnerability from cvelistv5 – Published: 2026-08-26 14:37 – Updated: 2026-08-27 12:40
VLAI
Title
ASoC: codecs: lpass-tx-macro: Fix enum kcontrol accesses
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
Severity
7.8 (High)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Assigner
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: c39667ddcfc516fee084e449179d54430a558298 , < dbc81b518f6936131bfd858be71cd4295136809c (git)
Affected: c39667ddcfc516fee084e449179d54430a558298 , < f84f2c81d792cf1e65571108a3bdd2c29e09e995 (git)
Affected: c39667ddcfc516fee084e449179d54430a558298 , < 48b76879f5bfc8584b99052510ac645c6ade8d2b (git)
Affected: c39667ddcfc516fee084e449179d54430a558298 , < 2ed3601e9db08fbdb071bd3d7bd8f115d6d871b0 (git)
Affected: c39667ddcfc516fee084e449179d54430a558298 , < b6baab796d11fb84c0e9444ffca91af5eab22c25 (git)
Affected: c39667ddcfc516fee084e449179d54430a558298 , < 3ee3c26ceee562079596abc9bc3307dd56dab4ed (git)
Affected: c39667ddcfc516fee084e449179d54430a558298 , < 1ba381759e45d5d0442452cfa5c42e836191a568 (git)
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Linux Linux Affected: 5.12
Unaffected: 0 , < 5.12 (semver)
Unaffected: 5.15.218 , ≤ 5.15.* (semver)
Unaffected: 6.1.185 , ≤ 6.1.* (semver)
Unaffected: 6.6.154 , ≤ 6.6.* (semver)
Unaffected: 6.12.106 , ≤ 6.12.* (semver)
Unaffected: 6.18.47 , ≤ 6.18.* (semver)
Unaffected: 7.1.10 , ≤ 7.1.* (semver)
Unaffected: 7.2 , ≤ * (original_commit_for_fix)
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          "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"
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              "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."
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    "dateUpdated": "2026-08-27T12:40:21.902Z",
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    "redhat_vex": {
      "aggregate_severity": "Moderate",
      "current_release_date": "2026-08-27T11:52:47+00:00",
      "cve": "CVE-2026-80583",
      "id": "CVE-2026-80583",
      "initial_release_date": "2026-08-26T00:00:00+00:00",
      "product_status:known_not_affected": "274",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "kernel: ASoC: codecs: lpass-tx-macro: Fix enum kcontrol accesses",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-80583.json",
      "version": "3"
    }
  }
}



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Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

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  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
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Detection rules are retrieved from Rulezet.