ALSA: aloop: Fix peer runtime UAF during format-change stop_CVE-2026-46090

{
    "lastseen": "",
    "description": "In the Linux kernel, the following vulnerability has been resolved:\n\nALSA: aloop: Fix peer runtime UAF during format-change stop\n\nloopback_check_format() may stop the capture side when playback starts\nwith parameters that no longer match a running capture stream. Commit\n826af7fa62e3 (\"ALSA: aloop: Fix racy access at PCM trigger\") moved\nthe peer lookup under cable->lock, but the actual snd_pcm_stop() still\nruns after dropping that lock.\n\nA concurrent close can clear the capture entry from cable->streams[] and\ndetach or free its runtime while the playback trigger path still holds a\nstale peer substream pointer.\n\nKeep a per-cable count of in-flight peer stops before dropping\ncable->lock, and make free_cable() wait for those stops before\ndetaching the runtime. This preserves the existing behavior while\nmaking the peer runtime lifetime explicit.",
    "published": "2026-05-27T12:58:34.428Z",
    "modified": "2026-05-30T10:47:24.830Z",
    "type": "cve",
    "title": "ALSA: aloop: Fix peer runtime UAF during format-change stop",
    "source": "Linux",
    "references": "https://git.kernel.org/stable/c/03f52a9c170431e8f10e156b9dc0dae80b3e9198\nhttps://git.kernel.org/stable/c/bdd9503c3d222d2735b56c7a8b4422ccf3de6e5c\nhttps://git.kernel.org/stable/c/5d45e34bf001344e2966dabca1897561bbc9e913\nhttps://git.kernel.org/stable/c/e5c33cdc6f402eab8abd36ecf436b22c9d3a8aff",
    "id": "CVE-2026-46090",
    "bulletinFamily": "",
    "cwe": null,
    "cvelist": null,
    "sourceData": "Linux Linux 597603d615d2b19a9e451d8cfac24372856a522d\nLinux Linux 597603d615d2b19a9e451d8cfac24372856a522d\nLinux Linux 597603d615d2b19a9e451d8cfac24372856a522d\nLinux Linux 597603d615d2b19a9e451d8cfac24372856a522d\nLinux Linux 2.6.37",
    "sourceHref": "",
    "cvss": {
        "score": 7.8,
        "severity": "HIGH",
        "vector": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
        "version": "3.1"
    },
    "cvss2": [],
    "cvss3": {
        "version": "",
        "vectorString": "",
        "baseScore": 0,
        "baseSeverity": "",
        "attackVector": "",
        "attackComplexity": "",
        "privilegesRequired": "",
        "userInteraction": "",
        "scope": "",
        "confidentialityImpact": "",
        "integrityImpact": "",
        "availabilityImpact": "",
        "cvssV3": {
            "version": "",
            "vectorString": "",
            "baseScore": 0,
            "baseSeverity": "",
            "attackVector": "",
            "attackComplexity": "",
            "privilegesRequired": "",
            "userInteraction": "",
            "scope": "",
            "confidentialityImpact": "",
            "integrityImpact": "",
            "availabilityImpact": ""
        }
    },
    "href": "",
    "category_name": "CVE",
    "post_link": "",
    "product": "Linux",
    "version": "597603d615d2b19a9e451d8cfac24372856a522d",
    "vendor": "Linux",
    "ai_description": "",
    "ai_severity": "",
    "ai_vendor": "",
    "ai_product": "",
    "ai_version": "",
    "ai_score": 0
}