ASoC: soc-core: flush delayed work before removing DAIs and widgets_CVE-2026-43459

{
    "lastseen": "",
    "description": "In the Linux kernel, the following vulnerability has been resolved:\n\nASoC: soc-core: flush delayed work before removing DAIs and widgets\n\nWhen a sound card is unbound while a PCM stream is open, a\nuse-after-free can occur in snd_soc_dapm_stream_event(), called from\nthe close_delayed_work workqueue handler.\n\nDuring unbind, snd_soc_unbind_card() flushes delayed work and then\ncalls soc_cleanup_card_resources(). Inside cleanup,\nsnd_card_disconnect_sync() releases all PCM file descriptors, and\nthe resulting PCM close path can call snd_soc_dapm_stream_stop()\nwhich schedules new delayed work with a pmdown_time timer delay.\nSince this happens after the flush in snd_soc_unbind_card(), the\nnew work is not caught. soc_remove_link_components() then frees\nDAPM widgets before this work fires, leading to the use-after-free.\n\nThe existing flush in soc_free_pcm_runtime() also cannot help as it\nruns after soc_remove_link_components() has already freed the widgets.\n\nAdd a flush in soc_cleanup_card_resources() after\nsnd_card_disconnect_sync() (after which no new PCM closes can\nschedule further delayed work) and before soc_remove_link_dais()\nand soc_remove_link_components() (which tear down the structures the\ndelayed work accesses).",
    "published": "2026-05-08T14:22:22.651Z",
    "modified": "2026-05-11T06:34:44.345Z",
    "type": "cve",
    "title": "ASoC: soc-core: flush delayed work before removing DAIs and widgets",
    "source": "Linux",
    "references": "https://git.kernel.org/stable/c/bf80a89da97285d9b877e0c6995e870d46b8025c\nhttps://git.kernel.org/stable/c/3887e514978d28216246360b46a9cb534969eb5a\nhttps://git.kernel.org/stable/c/231568afbc0cd25b8fb2a94ebf9738eabe1cf007\nhttps://git.kernel.org/stable/c/317a9298c54bb00319da73e5a7179f00e67fcbdf\nhttps://git.kernel.org/stable/c/eab71e11ce2447c1e01809cbc11eab4234cf8dc8\nhttps://git.kernel.org/stable/c/7d33e6140945482a07f8089ee86e13e02553ffdb\nhttps://git.kernel.org/stable/c/c054f0607c8bb1b1aa529bc109e4149298a1cccd\nhttps://git.kernel.org/stable/c/95bc5c225513fc3c4ce169563fb5e3929fbb938b",
    "id": "CVE-2026-43459",
    "bulletinFamily": "",
    "cwe": null,
    "cvelist": null,
    "sourceData": "Linux Linux e894efef9ac7c10b7727798dcc711cccf07569f9\nLinux Linux e894efef9ac7c10b7727798dcc711cccf07569f9\nLinux Linux e894efef9ac7c10b7727798dcc711cccf07569f9\nLinux Linux e894efef9ac7c10b7727798dcc711cccf07569f9\nLinux Linux e894efef9ac7c10b7727798dcc711cccf07569f9\nLinux Linux e894efef9ac7c10b7727798dcc711cccf07569f9\nLinux Linux e894efef9ac7c10b7727798dcc711cccf07569f9\nLinux Linux e894efef9ac7c10b7727798dcc711cccf07569f9\nLinux Linux 4.20",
    "sourceHref": "",
    "cvss": {
        "score": 7.3,
        "severity": "HIGH",
        "vector": "CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:H",
        "version": "3.1"
    },
    "cvss2": [],
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        "baseScore": 0,
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        "privilegesRequired": "",
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        "scope": "",
        "confidentialityImpact": "",
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        "availabilityImpact": "",
        "cvssV3": {
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    },
    "href": "",
    "category_name": "CVE",
    "post_link": "",
    "product": "Linux",
    "version": "e894efef9ac7c10b7727798dcc711cccf07569f9",
    "vendor": "Linux",
    "ai_description": "",
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    "ai_score": 0
}