CVE-2026-80828

Full vulnerability record from the local CVENow database.

Description

In the Linux kernel, the following vulnerability has been resolved: ALSA: usb-audio: Complete cleanup after system-resume errors A failed system resume can leave the card unusable until reboot. usb_audio_resume() jumps to err_out when snd_usb_pcm_resume() or snd_usb_mixer_resume() fails. The error path skips the out: block, which restores D0 and decrements chip->num_suspended_intf. The card stays in SNDRV_CTL_POWER_D3hot, so later control access blocks in snd_power_ref_and_wait(). USB core logs an interface resume callback error. It does not retry that callback, so a later callback cannot complete the skipped cleanup. usb_audio_suspend() increments num_suspended_intf before returning success. A system-resume callback must consume the system-suspend count even if a component resume fails. Otherwise, the stranded count skews later suspend and resume cycles. Do not apply this cleanup to runtime-resume errors. Runtime PM can retry -EAGAIN or -EBUSY without another suspend callback. The count must continue to describe that suspended interface. Other runtime-resume errors latch runtime_error in the PM core and do not cause an immediate callback retry. Both parts of the system-resume error path are longstanding. Commit 88a8516a2128a ("ALSA: usbaudio: implement USB autosuspend") introduced err_out past the D0 restore. Commit 862b2509d157c ("ALSA: usb-audio: Fix inconsistent card PM state after resume") later moved num_suspended_intf-- into the out: block. The error path now skips both operations. No third-party code is needed to reach the error path. snd_usb_mixer_resume() ends in snd_usb_mixer_activate(), which returns the result of usb_submit_urb() for devices that have a mixer status URB. Its mixer->private_resume hook can also fail through scarlett2_init_notify(). snd_usb_pcm_resume() issues a SET_CUR request to a UAC3 power domain. It can return -EPIPE or -EIO when the device stalls the request. Route a component error through out: only when system_suspend is nonzero. Continue to return runtime-resume errors through err_out. Later component resume stages remain skipped. The original error still reaches USB core. A later transfer can fail if the device did not recover. I reproduced the system-resume failure on an Audient iD14 MkI with an out-of-tree diagnostic mixer resume hook. An injected -EIO on the unpatched core left control readers in uninterruptible sleep in snd_power_ref_and_wait() until a reboot. With this patch, the same failure restored control access. A second system suspend and resume also succeeded after I disabled fault injection.

Severity

Not scored

CVSS score

Not available

Vulnerability status

Received

Source identifier

416baaa9-dc9f-4396-8d5f-8c081fb06d67

Published

2026-09-04 16:18:10.833000

Last modified

2026-10-19 09:17:17.833000

View original CVE JSON

{
  "id": "CVE-2026-80828",
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "published": "2026-09-04T16:18:10.833",
  "lastModified": "2026-10-19T09:17:17.833",
  "vulnStatus": "Received",
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nALSA: usb-audio: Complete cleanup after system-resume errors\n\nA failed system resume can leave the card unusable until reboot.\nusb_audio_resume() jumps to err_out when snd_usb_pcm_resume() or\nsnd_usb_mixer_resume() fails. The error path skips the out: block, which\nrestores D0 and decrements chip->num_suspended_intf.\n\nThe card stays in SNDRV_CTL_POWER_D3hot, so later control access blocks in\nsnd_power_ref_and_wait(). USB core logs an interface resume callback error.\nIt does not retry that callback, so a later callback cannot complete the\nskipped cleanup.\n\nusb_audio_suspend() increments num_suspended_intf before returning success.\nA system-resume callback must consume the system-suspend count even if a\ncomponent resume fails. Otherwise, the stranded count skews later suspend\nand resume cycles.\n\nDo not apply this cleanup to runtime-resume errors. Runtime PM can retry\n-EAGAIN or -EBUSY without another suspend callback. The count must continue\nto describe that suspended interface. Other runtime-resume errors latch\nruntime_error in the PM core and do not cause an immediate callback retry.\n\nBoth parts of the system-resume error path are longstanding. Commit\n88a8516a2128a (\"ALSA: usbaudio: implement USB autosuspend\") introduced\nerr_out past the D0 restore. Commit 862b2509d157c (\"ALSA: usb-audio: Fix\ninconsistent card PM state after resume\") later moved\nnum_suspended_intf-- into the out: block. The error path now skips both\noperations.\n\nNo third-party code is needed to reach the error path.\nsnd_usb_mixer_resume() ends in snd_usb_mixer_activate(), which returns the\nresult of usb_submit_urb() for devices that have a mixer status URB. Its\nmixer->private_resume hook can also fail through scarlett2_init_notify().\nsnd_usb_pcm_resume() issues a SET_CUR request to a UAC3 power domain. It\ncan return -EPIPE or -EIO when the device stalls the request.\n\nRoute a component error through out: only when system_suspend is nonzero.\nContinue to return runtime-resume errors through err_out. Later component\nresume stages remain skipped. The original error still reaches USB core.\nA later transfer can fail if the device did not recover.\n\nI reproduced the system-resume failure on an Audient iD14 MkI with an\nout-of-tree diagnostic mixer resume hook. An injected -EIO on the unpatched\ncore left control readers in uninterruptible sleep in\nsnd_power_ref_and_wait() until a reboot. With this patch, the same failure\nrestored control access. A second system suspend and resume also succeeded\nafter I disabled fault injection."
    }
  ],
  "affected": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "affectedData": [
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "unaffected",
          "programFiles": [
            "sound/usb/card.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "versions": [
            {
              "version": "88a8516a2128a6d078a106ead48092240e8a138f",
              "lessThan": "3fa521c3c54b42e16cad8ade76551113a783752b",
              "versionType": "git",
              "status": "affected"
            },
            {
              "version": "88a8516a2128a6d078a106ead48092240e8a138f",
              "lessThan": "3f06f3f5b16212f180764654a9398ff5f7a855c8",
              "versionType": "git",
              "status": "affected"
            },
            {
              "version": "88a8516a2128a6d078a106ead48092240e8a138f",
              "lessThan": "f1c05c41d07b874635d681ae328d13ec550470c5",
              "versionType": "git",
              "status": "affected"
            },
            {
              "version": "88a8516a2128a6d078a106ead48092240e8a138f",
              "lessThan": "5a625fc2284e35f33693efd9534aebaca3b005d4",
              "versionType": "git",
              "status": "affected"
            },
            {
              "version": "88a8516a2128a6d078a106ead48092240e8a138f",
              "lessThan": "6d3e202670b819c414076a5d07dffac8a39274ad",
              "versionType": "git",
              "status": "affected"
            },
            {
              "version": "88a8516a2128a6d078a106ead48092240e8a138f",
              "lessThan": "6c94877b6bab9185898bcad4b082ff5592558921",
              "versionType": "git",
              "status": "affected"
            },
            {
              "version": "88a8516a2128a6d078a106ead48092240e8a138f",
              "lessThan": "d1f643b1c0258bd519146f7a342bbb394d413912",
              "versionType": "git",
              "status": "affected"
            },
            {
              "version": "88a8516a2128a6d078a106ead48092240e8a138f",
              "lessThan": "1739a976312e110c93a8dee66a1cdf893a1b187e",
              "versionType": "git",
              "status": "affected"
            }
          ]
        },
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "affected",
          "programFiles": [
            "sound/usb/card.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "versions": [
            {
              "version": "2.6.39",
              "status": "affected"
            },
            {
              "version": "0",
              "lessThan": "2.6.39",
              "versionType": "semver",
              "status": "unaffected"
            },
            {
              "version": "5.15.220",
              "lessThanOrEqual": "5.15.*",
              "versionType": "semver",
              "status": "unaffected"
            },
            {
              "version": "6.1.187",
              "lessThanOrEqual": "6.1.*",
              "versionType": "semver",
              "status": "unaffected"
            },
            {
              "version": "6.6.156",
              "lessThanOrEqual": "6.6.*",
              "versionType": "semver",
              "status": "unaffected"
            },
            {
              "version": "6.12.108",
              "lessThanOrEqual": "6.12.*",
              "versionType": "semver",
              "status": "unaffected"
            },
            {
              "version": "6.18.49",
              "lessThanOrEqual": "6.18.*",
              "versionType": "semver",
              "status": "unaffected"
            },
            {
              "version": "7.1.13",
              "lessThanOrEqual": "7.1.*",
              "versionType": "semver",
              "status": "unaffected"
            },
            {
              "version": "7.2.3",
              "lessThanOrEqual": "7.2.*",
              "versionType": "semver",
              "status": "unaffected"
            },
            {
              "version": "7.3",
              "lessThanOrEqual": "*",
              "versionType": "original_commit_for_fix",
              "status": "unaffected"
            }
          ]
        }
      ]
    }
  ],
  "metrics": {},
  "references": [
    {
      "url": "https://git.kernel.org/stable/c/1739a976312e110c93a8dee66a1cdf893a1b187e",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/3f06f3f5b16212f180764654a9398ff5f7a855c8",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/3fa521c3c54b42e16cad8ade76551113a783752b",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/5a625fc2284e35f33693efd9534aebaca3b005d4",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/6c94877b6bab9185898bcad4b082ff5592558921",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/6d3e202670b819c414076a5d07dffac8a39274ad",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/d1f643b1c0258bd519146f7a342bbb394d413912",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/f1c05c41d07b874635d681ae328d13ec550470c5",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    }
  ]
}