CVE-2026-64490

In the Linux kernel, the following vulnerability has been resolved: ALSA: virtio: Validate control metadata from the device virtio-snd control handling trusts the device-provided control type and value count returned by the device. That metadata is then used directly to index g_v2a_type_map[] in virtsnd_kctl_info(), and to size loops and memcpy() operations in virtsnd_kctl_get() and virtsnd_kctl_put() against fixed-size virtio_snd_ctl_value and snd_ctl_elem_value arrays. A buggy or malicious device can therefore trigger out-of-bounds access by advertising an invalid control type or an oversized value count. Validate control type and count once in virtsnd_kctl_parse_cfg(), before querying enumerated items or exposing the control to ALSA.

CVSS v3 8.4 HIGH

8.4^/10

CVSS v3 : HIGH

Vector :

Exploitability : 2.5 / Impact : 5.9

Attack Vector LOCAL

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact HIGH

Scope UNCHANGED

References

Link	Resource
https://git.kernel.org/stable/c/21584672fd699abe1768241d6c501b2de6139b6a
https://git.kernel.org/stable/c/3243563f99ef5d3949b934bd6390a5679405d0e1
https://git.kernel.org/stable/c/5da9742de22db0dbaa8d414214ab5e1bedde00f9
https://git.kernel.org/stable/c/c77a6cbb36ff8cbc1f084d94f8dcda5250935271

Configurations

No configuration.

History

No history.

Information

Published : 2026-07-25 10:17

Updated : 2026-08-17 05:17

NVD link : CVE-2026-64490

Mitre link : CVE-2026-64490

CVE.ORG link : CVE-2026-64490

JSON object : View

Products Affected

No product.

CWE

No CWE.

{"id": "CVE-2026-64490", "cveTags": [], "metrics": {"cvssMetricV31": [{"type": "Secondary", "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "cvssData": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 8.4, "attackVector": "LOCAL", "baseSeverity": "HIGH", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H", "integrityImpact": "HIGH", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "HIGH", "privilegesRequired": "NONE", "confidentialityImpact": "HIGH"}, "impactScore": 5.9, "exploitabilityScore": 2.5}]}, "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": "d6568e3de42dd971a1356f7ba581e6600d53f0a0", "lessThan": "3243563f99ef5d3949b934bd6390a5679405d0e1", "versionType": "git"}, {"status": "affected", "version": "d6568e3de42dd971a1356f7ba581e6600d53f0a0", "lessThan": "5da9742de22db0dbaa8d414214ab5e1bedde00f9", "versionType": "git"}, {"status": "affected", "version": "d6568e3de42dd971a1356f7ba581e6600d53f0a0", "lessThan": "21584672fd699abe1768241d6c501b2de6139b6a", "versionType": "git"}, {"status": "affected", "version": "d6568e3de42dd971a1356f7ba581e6600d53f0a0", "lessThan": "c77a6cbb36ff8cbc1f084d94f8dcda5250935271", "versionType": "git"}], "programFiles": ["sound/virtio/virtio_kctl.c"], "defaultStatus": "unaffected"}, {"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "product": "Linux", "versions": [{"status": "affected", "version": "6.9"}, {"status": "unaffected", "version": "0", "lessThan": "6.9", "versionType": "semver"}, {"status": "unaffected", "version": "6.12.96", "versionType": "semver", "lessThanOrEqual": "6.12.*"}, {"status": "unaffected", "version": "6.18.39", "versionType": "semver", "lessThanOrEqual": "6.18.*"}, {"status": "unaffected", "version": "7.1.4", "versionType": "semver", "lessThanOrEqual": "7.1.*"}, {"status": "unaffected", "version": "7.2", "versionType": "original_commit_for_fix", "lessThanOrEqual": "*"}], "programFiles": ["sound/virtio/virtio_kctl.c"], "defaultStatus": "affected"}]}], "published": "2026-07-25T10:17:34.807", "references": [{"url": "https://git.kernel.org/stable/c/21584672fd699abe1768241d6c501b2de6139b6a", "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/3243563f99ef5d3949b934bd6390a5679405d0e1", "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/5da9742de22db0dbaa8d414214ab5e1bedde00f9", "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/c77a6cbb36ff8cbc1f084d94f8dcda5250935271", "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}], "vulnStatus": "Received", "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nALSA: virtio: Validate control metadata from the device\n\nvirtio-snd control handling trusts the device-provided control type and\nvalue count returned by the device.\n\nThat metadata is then used directly to index g_v2a_type_map[] in\nvirtsnd_kctl_info(), and to size loops and memcpy() operations in\nvirtsnd_kctl_get() and virtsnd_kctl_put() against fixed-size\nvirtio_snd_ctl_value and snd_ctl_elem_value arrays.\n\nA buggy or malicious device can therefore trigger out-of-bounds access by\nadvertising an invalid control type or an oversized value count.\n\nValidate control type and count once in virtsnd_kctl_parse_cfg(), before\nquerying enumerated items or exposing the control to ALSA."}], "lastModified": "2026-08-17T05:17:54.887", "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}