{"id":"CVE-2026-98266","title":"In the Linux kernel, the following vulnerability has been resolved:\n\nALSA: core: Fix potential UAF after asynchronous card release\n\nUsually a sound driver releases the resources assigned to the card via\nsnd_card_free(), and it synchroniz…","summary":"In the Linux kernel, the following vulnerability has been resolved:\n\nALSA: core: Fix potential UAF after asynchronous card release\n\nUsually a sound driver releases the resources assigned to the card via\nsnd_card_free(), and it synchroniz…","severity":"high","vendor":"Linux","product":"Linux","affected":["Linux >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < 5c0df40aa577e405c458e44e8d458dd78407f4af","Linux >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < 2dec4642589a663e064e4411d92d6e8fa250d53b","Linux >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < 398b21608955c9712a012355b69a39407367edc9","Linux >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < fd95e68df6fe66344161a1329cbe5e5805e7b704","Linux 2.6.12"],"published":"2026-10-06","updated":"2026-10-07","sourceUpdated":"2026-10-07T07:17:07.540","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-98266","references":[{"url":"https://git.kernel.org/stable/c/2dec4642589a663e064e4411d92d6e8fa250d53b","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/398b21608955c9712a012355b69a39407367edc9","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/5c0df40aa577e405c458e44e8d458dd78407f4af","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/fd95e68df6fe66344161a1329cbe5e5805e7b704","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-98266.json"},{"url":"https://access.redhat.com/security/cve/CVE-2026-98266"},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2546483"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-98266"},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-98266"},{"url":"https://git.kernel.org/pub/scm/linux/security/vulns.git/plain/cve/published/2026/CVE-2026-98266.mbox"}],"tags":["nvd","cve.org","csaf","vex","red-hat"],"epss":0.00168,"epssPercentile":0.0603,"ingestedAt":"2026-10-06T08:50:17.424Z","cvss":7,"cvssVector":"CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H","cvssSource":"vendor","cwe":["CWE-825"],"slug":"CVE-2026-98266","body":"## Overview\n\nIn the Linux kernel, the following vulnerability has been resolved:\n\nALSA: core: Fix potential UAF after asynchronous card release\n\nUsually a sound driver releases the resources assigned to the card via\nsnd_card_free(), and it synchronizes with the whole release procedure.\nHowever, when the card is released asynchronously via\nsnd_card_free_when_closed() like USB-audio driver, the situation is\nslightly different; although the snd_card_disconnect() call at the\ndisconnection guarantees that any newer accesses will be gated, the\nin-flight tasks might be still accessing to the underlying card->dev\ndevice even after the disconnection, which would cause a\nuse-after-free in the end, as reported by fuzzers.\n\nFor addressing the bug above, this patch takes the refcount of\ncard->dev at initialization of the card object, and releases at its\ndestructor.   This assures the availability of the card->dev in its\nwhole lifecycle.\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.\n\n## Vendor advisories\n\n- **Red Hat VEX** · Moderate · affected: Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 6, Red Hat Enterprise Linux 7, Red Hat Enterprise Linux 8, Red Hat Enterprise Linux 9, Red Hat OpenShift Container Platform 4 · no fix planned: Red Hat Enterprise Linux 6, Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 7, Red Hat Enterprise Linux 8, … · updated 2026-10-10 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-98266.json)","depth":"twilight","depthScore":39,"depthScoreParts":{"impact":38.5,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[{"seq":219087,"id":"CVE-2026-98266","ts":1791707055283,"field":"cvss","old":null,"new":"7"},{"seq":219086,"id":"CVE-2026-98266","ts":1791707055283,"field":"severity","old":"none","new":"high"}]}