CVE-2026-23089
Status: AnalyzedHigh (7.8)—
In the Linux kernel, the following vulnerability has been resolved:
ALSA: usb-audio: Fix use-after-free in snd_usb_mixer_free()
When snd_usb_create_mixer() fails, snd_usb_mixer_free() frees mixer->id_elems but the controls already added to the card still reference the freed memory. Later when snd_card_register() runs, the OSS mixer layer calls their callbacks and hits a use-after-free read.
Fix by calling snd_ctl_remove() for all mixer controls before freeing id_elems. We save the next pointer first because snd_ctl_remove() frees the current element.
Technical details traces, logs and code from the original report
Call trace: get_ctl_value+0x63f/0x820 sound/usb/mixer.c:411 get_min_max_with_quirks.isra.0+0x240/0x1f40 sound/usb/mixer.c:1241 mixer_ctl_feature_info+0x26b/0x490 sound/usb/mixer.c:1381 snd_mixer_oss_build_test+0x174/0x3a0 sound/core/oss/mixer_oss.c:887 ... snd_card_register+0x4ed/0x6d0 sound/core/init.c:923 usb_audio_probe+0x5ef/0x2a90 sound/usb/card.c:1025
CVSS
- Version: 3.1
- Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
- Base score: 7.8
Exploitation probability (EPSS)
- Probability of exploitation in the next 30 days: 0.16%
- Percentile among all scored CVEs: 4
- Score date: 10/5/2026
EPSS (Exploit Prediction Scoring System, FIRST) estimates how likely a vulnerability is to be exploited in the wild within 30 days. It complements CVSS (impact) and CISA KEV (confirmed exploitation).
🎯 ATT&CK techniques
How this vulnerability is exploited and what the attacker gains, in MITRE ATT&CK terms.
- Exploitation
T1068Exploitation for Privilege Escalationprivilege escalation85 % - Primary impact
T1059Command and Scripting Interpreterexecution75 %
Vulnerabilidad local (AV:L, PR:L) sin interacción que permite al atacante escalada de privilegios mediante corrupción de memoria (use-after-free en CWE-416). Impacto de ejecución de código al invocar callbacks de control durante el registro de tarjeta de sonido.
Inferred by our analysis agent from the official description, CVSS vector and CWE, and checked by a supervisor. May contain errors.
🛡️ ATT&CK mitigations that cover these techniques
Affected technologies (1)
CWEs
- CWE-416
References
- https://git.kernel.org/stable/c/51b1aa6fe7dc87356ba58df06afb9677c9b841ea
- https://git.kernel.org/stable/c/56fb6efd5d04caf6f14994d51ec85393b9a896c6
- https://git.kernel.org/stable/c/7009daeefa945973a530b2f605fe445fc03747af
- https://git.kernel.org/stable/c/7bff0156d13f0ad9436e5178b979b063d59f572a
- https://git.kernel.org/stable/c/930e69757b74c3ae083b0c3c7419bfe7f0edc7b2
- https://git.kernel.org/stable/c/dc1a5dd80af1ee1f29d8375b12dd7625f6294dad
- https://git.kernel.org/stable/c/e6f103a22b08daf5df2f4aa158081840e5910963
Raw JSON (NVD)
Show
{
"id": "CVE-2026-23089",
"cveTags": [],
"metrics": {
"ssvcV203": [
{
"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"ssvcData": {
"id": "CVE-2026-23089",
"role": "CISA Coordinator",
"options": [
{
"exploitation": "none"
},
{
"automatable": "no"
},
{
"technicalImpact": "total"
}
],
"version": "2.0.3",
"timestamp": "2026-06-10T20:40:33.270292Z"
}
}
],
"cvssMetricV31": [
{
"type": "Primary",
"source": "nvd@nist.gov",
"cvssData": {
"scope": "UNCHANGED",
"version": "3.1",
"baseScore": 7.8,
"attackVector": "LOCAL",
"baseSeverity": "HIGH",
"vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
"integrityImpact": "HIGH",
"userInteraction": "NONE",
"attackComplexity": "LOW",
"availabilityImpact": "HIGH",
"privilegesRequired": "LOW",
"confidentialityImpact": "HIGH"
},
"impactScore": 5.9,
"exploitabilityScore": 1.8
}
]
},
"affected": [
{
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"affectedData": [
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "6639b6c2367f884ca172b78d69f7da17bfab2e5e",
"lessThan": "51b1aa6fe7dc87356ba58df06afb9677c9b841ea",
"versionType": "git"
},
{
"status": "affected",
"version": "6639b6c2367f884ca172b78d69f7da17bfab2e5e",
"lessThan": "56fb6efd5d04caf6f14994d51ec85393b9a896c6",
"versionType": "git"
},
{
"status": "affected",
"version": "6639b6c2367f884ca172b78d69f7da17bfab2e5e",
"lessThan": "7009daeefa945973a530b2f605fe445fc03747af",
"versionType": "git"
},
{
"status": "affected",
"version": "6639b6c2367f884ca172b78d69f7da17bfab2e5e",
"lessThan": "7bff0156d13f0ad9436e5178b979b063d59f572a",
"versionType": "git"
},
{
"status": "affected",
"version": "6639b6c2367f884ca172b78d69f7da17bfab2e5e",
"lessThan": "e6f103a22b08daf5df2f4aa158081840e5910963",
"versionType": "git"
},
{
"status": "affected",
"version": "6639b6c2367f884ca172b78d69f7da17bfab2e5e",
"lessThan": "dc1a5dd80af1ee1f29d8375b12dd7625f6294dad",
"versionType": "git"
},
{
"status": "affected",
"version": "6639b6c2367f884ca172b78d69f7da17bfab2e5e",
"lessThan": "930e69757b74c3ae083b0c3c7419bfe7f0edc7b2",
"versionType": "git"
}
],
"programFiles": [
"sound/usb/mixer.c"
],
"defaultStatus": "unaffected"
},
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "2.6.13"
},
{
"status": "unaffected",
"version": "0",
"lessThan": "2.6.13",
"versionType": "semver"
},
{
"status": "unaffected",
"version": "5.10.249",
"versionType": "semver",
"lessThanOrEqual": "5.10.*"
},
{
"status": "unaffected",
"version": "5.15.199",
"versionType": "semver",
"lessThanOrEqual": "5.15.*"
},
{
"status": "unaffected",
"version": "6.1.162",
"versionType": "semver",
"lessThanOrEqual": "6.1.*"
},
{
"status": "unaffected",
"version": "6.6.122",
"versionType": "semver",
"lessThanOrEqual": "6.6.*"
},
{
"status": "unaffected",
"version": "6.12.68",
"versionType": "semver",
"lessThanOrEqual": "6.12.*"
},
{
"status": "unaffected",
"version": "6.18.8",
"versionType": "semver",
"lessThanOrEqual": "6.18.*"
},
{
"status": "unaffected",
"version": "6.19",
"versionType": "original_commit_for_fix",
"lessThanOrEqual": "*"
}
],
"programFiles": [
"sound/usb/mixer.c"
],
"defaultStatus": "affected"
}
]
}
],
"published": "2026-02-04T17:16:19.780",
"references": [
{
"url": "https://git.kernel.org/stable/c/51b1aa6fe7dc87356ba58df06afb9677c9b841ea",
"tags": [
"Patch"
],
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
},
{
"url": "https://git.kernel.org/stable/c/56fb6efd5d04caf6f14994d51ec85393b9a896c6",
"tags": [
"Patch"
],
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
},
{
"url": "https://git.kernel.org/stable/c/7009daeefa945973a530b2f605fe445fc03747af",
"tags": [
"Patch"
],
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
},
{
"url": "https://git.kernel.org/stable/c/7bff0156d13f0ad9436e5178b979b063d59f572a",
"tags": [
"Patch"
],
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
},
{
"url": "https://git.kernel.org/stable/c/930e69757b74c3ae083b0c3c7419bfe7f0edc7b2",
"tags": [
"Patch"
],
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
},
{
"url": "https://git.kernel.org/stable/c/dc1a5dd80af1ee1f29d8375b12dd7625f6294dad",
"tags": [
"Patch"
],
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
},
{
"url": "https://git.kernel.org/stable/c/e6f103a22b08daf5df2f4aa158081840e5910963",
"tags": [
"Patch"
],
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
}
],
"vulnStatus": "Analyzed",
"weaknesses": [
{
"type": "Primary",
"source": "nvd@nist.gov",
"description": [
{
"lang": "en",
"value": "CWE-416"
}
]
}
],
"descriptions": [
{
"lang": "en",
"value": "In the Linux kernel, the following vulnerability has been resolved:\n\nALSA: usb-audio: Fix use-after-free in snd_usb_mixer_free()\n\nWhen snd_usb_create_mixer() fails, snd_usb_mixer_free() frees\nmixer->id_elems but the controls already added to the card still\nreference the freed memory. Later when snd_card_register() runs,\nthe OSS mixer layer calls their callbacks and hits a use-after-free read.\n\nCall trace:\n get_ctl_value+0x63f/0x820 sound/usb/mixer.c:411\n get_min_max_with_quirks.isra.0+0x240/0x1f40 sound/usb/mixer.c:1241\n mixer_ctl_feature_info+0x26b/0x490 sound/usb/mixer.c:1381\n snd_mixer_oss_build_test+0x174/0x3a0 sound/core/oss/mixer_oss.c:887\n ...\n snd_card_register+0x4ed/0x6d0 sound/core/init.c:923\n usb_audio_probe+0x5ef/0x2a90 sound/usb/card.c:1025\n\nFix by calling snd_ctl_remove() for all mixer controls before freeing\nid_elems. We save the next pointer first because snd_ctl_remove()\nfrees the current element."
},
{
"lang": "es",
"value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad:\n\nALSA: usb-audio: Corrección de uso después de liberación en snd_usb_mixer_free()\n\nCuando snd_usb_create_mixer() falla, snd_usb_mixer_free() libera mixer->id_elems, pero los controles ya añadidos a la tarjeta siguen referenciando la memoria liberada. Más tarde, cuando se ejecuta snd_card_register(), la capa del mezclador OSS llama a sus retrollamadas y se produce una lectura de uso después de liberación.\n\nTraza de llamada:\n get_ctl_value+0x63f/0x820 sound/usb/mixer.c:411\n get_min_max_with_quirks.isra.0+0x240/0x1f40 sound/usb/mixer.c:1241\n mixer_ctl_feature_info+0x26b/0x490 sound/usb/mixer.c:1381\n snd_mixer_oss_build_test+0x174/0x3a0 sound/core/oss/mixer_oss.c:887\n ...\n snd_card_register+0x4ed/0x6d0 sound/core/init.c:923\n usb_audio_probe+0x5ef/0x2a90 sound/usb/card.c:1025\n\nSe corrige llamando a snd_ctl_remove() para todos los controles del mezclador antes de liberar id_elems. Guardamos el siguiente puntero primero porque snd_ctl_remove() libera el elemento actual."
}
],
"lastModified": "2026-06-17T10:20:51.850",
"configurations": [
{
"nodes": [
{
"negate": false,
"cpeMatch": [
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "FF8E9F0D-F0AD-45F3-935B-FCC837066EC9",
"versionEndExcluding": "5.10.249",
"versionStartIncluding": "2.6.13"
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "A247FBA6-BEB9-484F-B892-DD5517949CCD",
"versionEndExcluding": "5.15.199",
"versionStartIncluding": "5.11"
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "6579E0D4-0641-479D-A4C3-0EF618798C55",
"versionEndExcluding": "6.1.162",
"versionStartIncluding": "5.16"
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "8EAAE395-0162-4BAF-9AD5-E9AF3C869C4F",
"versionEndExcluding": "6.6.122",
"versionStartIncluding": "6.2"
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "52F38E19-0FDD-4992-9D6D-D4169D689598",
"versionEndExcluding": "6.12.68",
"versionStartIncluding": "6.7"
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "E65C6E79-7EBE-4C77-93F0-818CF5B38F4E",
"versionEndExcluding": "6.18.8",
"versionStartIncluding": "6.13"
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:6.19:rc1:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "17B67AA7-40D6-4AFA-8459-F200F3D7CFD1"
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:6.19:rc2:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "C47E4CC9-C826-4FA9-B014-7FE3D9B318B2"
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:6.19:rc3:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "F71D92C0-C023-48BD-B3B6-70B638EEE298"
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:6.19:rc4:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "13580667-0A98-40CC-B29F-D12790B91BDB"
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:6.19:rc5:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "CAD1FED7-CF48-47BF-AC7D-7B6FA3C065FC"
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:6.19:rc6:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "3EF854A1-ABB1-4E93-BE9A-44569EC76C0D"
}
],
"operator": "OR"
}
]
}
],
"sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
}