{"id":"CVE-2026-80828","title":"ALSA: usb-audio: Complete cleanup after system-resume errors","summary":"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 …","severity":"none","vendor":"Linux","product":"Linux","affected":["Linux >= 88a8516a2128a6d078a106ead48092240e8a138f < 3fa521c3c54b42e16cad8ade76551113a783752b","Linux >= 88a8516a2128a6d078a106ead48092240e8a138f < 3f06f3f5b16212f180764654a9398ff5f7a855c8","Linux >= 88a8516a2128a6d078a106ead48092240e8a138f < f1c05c41d07b874635d681ae328d13ec550470c5","Linux >= 88a8516a2128a6d078a106ead48092240e8a138f < 5a625fc2284e35f33693efd9534aebaca3b005d4","Linux >= 88a8516a2128a6d078a106ead48092240e8a138f < 6d3e202670b819c414076a5d07dffac8a39274ad","Linux >= 88a8516a2128a6d078a106ead48092240e8a138f < 6c94877b6bab9185898bcad4b082ff5592558921","Linux >= 88a8516a2128a6d078a106ead48092240e8a138f < d1f643b1c0258bd519146f7a342bbb394d413912","Linux >= 88a8516a2128a6d078a106ead48092240e8a138f < 1739a976312e110c93a8dee66a1cdf893a1b187e","Linux 2.6.39"],"published":"2026-09-04","updated":"2026-10-19","sourceUpdated":"2026-10-19T08:44:20.734Z","source":"CVEORG","sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-80828","references":[{"url":"https://git.kernel.org/stable/c/3fa521c3c54b42e16cad8ade76551113a783752b"},{"url":"https://git.kernel.org/stable/c/3f06f3f5b16212f180764654a9398ff5f7a855c8"},{"url":"https://git.kernel.org/stable/c/f1c05c41d07b874635d681ae328d13ec550470c5"},{"url":"https://git.kernel.org/stable/c/5a625fc2284e35f33693efd9534aebaca3b005d4"},{"url":"https://git.kernel.org/stable/c/6d3e202670b819c414076a5d07dffac8a39274ad"},{"url":"https://git.kernel.org/stable/c/6c94877b6bab9185898bcad4b082ff5592558921"},{"url":"https://git.kernel.org/stable/c/d1f643b1c0258bd519146f7a342bbb394d413912"},{"url":"https://git.kernel.org/stable/c/1739a976312e110c93a8dee66a1cdf893a1b187e"}],"tags":["cve.org"],"epss":0.0019,"epssPercentile":0.08089,"ingestedAt":"2026-10-19T09:16:01.502Z","slug":"CVE-2026-80828","body":"## Overview\n\nIn 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.\n\n## Affected\n\n- `Linux >= 88a8516a2128a6d078a106ead48092240e8a138f < 3fa521c3c54b42e16cad8ade76551113a783752b`\n- `Linux >= 88a8516a2128a6d078a106ead48092240e8a138f < 3f06f3f5b16212f180764654a9398ff5f7a855c8`\n- `Linux >= 88a8516a2128a6d078a106ead48092240e8a138f < f1c05c41d07b874635d681ae328d13ec550470c5`\n- `Linux >= 88a8516a2128a6d078a106ead48092240e8a138f < 5a625fc2284e35f33693efd9534aebaca3b005d4`\n- `Linux >= 88a8516a2128a6d078a106ead48092240e8a138f < 6d3e202670b819c414076a5d07dffac8a39274ad`\n- `Linux >= 88a8516a2128a6d078a106ead48092240e8a138f < 6c94877b6bab9185898bcad4b082ff5592558921`\n- `Linux >= 88a8516a2128a6d078a106ead48092240e8a138f < d1f643b1c0258bd519146f7a342bbb394d413912`\n- `Linux >= 88a8516a2128a6d078a106ead48092240e8a138f < 1739a976312e110c93a8dee66a1cdf893a1b187e`\n- `Linux 2.6.39`\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"sunlit","depthScore":3,"depthScoreParts":{"impact":2.8,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}