CVE-2026-98266
In the Linux kernel, the following vulnerability has been resolved:
ALSA: core: Fix potential UAF after asynchronous card release
Usually a sound driver releases the resources assigned to the card via snd_card_free(), and it synchronizes with the whole release procedure. However, when the card is released asynchronously via snd_card_free_when_closed() like USB-audio driver, the situation is slightly different; although the snd_card_disconnect() call at the disconnection guarantees that any newer accesses will be gated, the in-flight tasks might be still accessing to the underlying card->dev device even after the disconnection, which would cause a use-after-free in the end, as reported by fuzzers.
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For addressing the bug above, this patch takes the refcount of card->dev at initialization of the card object, and releases at its destructor. This assures the availability of the card->dev in its whole lifecycle.
CVSS
NVD no ha asignado puntuación CVSS a esta CVE (habitual desde el cambio de política de abril de 2026).
Probabilidad de explotación (EPSS)
- Probabilidad de explotación en los próximos 30 días: 0.21%
- Percentil entre todas las CVEs puntuadas: 10
- Fecha de la puntuación: 6/10/2026
EPSS (Exploit Prediction Scoring System, de FIRST) estima la probabilidad de que una vulnerabilidad sea explotada en 30 días. Complementa a CVSS (impacto) y a CISA KEV (explotación confirmada).
Tecnologías afectadas (1)
⚠ Inferidas por IA a partir de la descripción — NVD aún no ha analizado esta CVE; no son CPE verificados.
Referencias
JSON original (NVD)
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{
"id": "CVE-2026-98266",
"cveTags": [],
"metrics": {},
"affected": [
{
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"affectedData": [
{
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"vendor": "Linux",
"product": "Linux",
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{
"status": "affected",
"version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2",
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{
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{
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{
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{
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{
"status": "affected",
"version": "0",
"lessThan": "6.18.54",
"versionType": "semver"
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{
"status": "affected",
"version": "0",
"lessThan": "7.2.8",
"versionType": "semver"
}
],
"programFiles": [
"sound/core/init.c"
],
"defaultStatus": "unaffected"
},
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
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"version": "6.12.112",
"versionType": "semver",
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{
"status": "unaffected",
"version": "6.18.54",
"versionType": "semver",
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{
"status": "unaffected",
"version": "7.2.8",
"versionType": "semver",
"lessThanOrEqual": "7.2.*"
},
{
"status": "unaffected",
"version": "7.3-rc4",
"versionType": "original_commit_for_fix",
"lessThanOrEqual": "*"
}
],
"programFiles": [
"sound/core/init.c"
],
"defaultStatus": "affected"
}
]
}
],
"published": "2026-10-06T09:18:15.960",
"references": [
{
"url": "https://git.kernel.org/stable/c/2dec4642589a663e064e4411d92d6e8fa250d53b",
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
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{
"url": "https://git.kernel.org/stable/c/398b21608955c9712a012355b69a39407367edc9",
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
},
{
"url": "https://git.kernel.org/stable/c/5c0df40aa577e405c458e44e8d458dd78407f4af",
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
},
{
"url": "https://git.kernel.org/stable/c/fd95e68df6fe66344161a1329cbe5e5805e7b704",
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
}
],
"vulnStatus": "Received",
"descriptions": [
{
"lang": "en",
"value": "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 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."
}
],
"lastModified": "2026-10-06T09:18:15.960",
"sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
}