{"api_version":"1","generated_at":"2026-07-26T04:39:21+00:00","cve":"CVE-2026-64490","urls":{"html":"https://cve.report/CVE-2026-64490","api":"https://cve.report/api/cve/CVE-2026-64490.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2026-64490","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-64490"},"summary":{"title":"ALSA: virtio: Validate control metadata from the device","description":"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.","state":"PUBLISHED","assigner":"Linux","published_at":"2026-07-25 10:17:34","updated_at":"2026-07-25 10:17:34"},"problem_types":[],"metrics":[],"references":[{"url":"https://git.kernel.org/stable/c/5da9742de22db0dbaa8d414214ab5e1bedde00f9","name":"https://git.kernel.org/stable/c/5da9742de22db0dbaa8d414214ab5e1bedde00f9","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/c77a6cbb36ff8cbc1f084d94f8dcda5250935271","name":"https://git.kernel.org/stable/c/c77a6cbb36ff8cbc1f084d94f8dcda5250935271","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/3243563f99ef5d3949b934bd6390a5679405d0e1","name":"https://git.kernel.org/stable/c/3243563f99ef5d3949b934bd6390a5679405d0e1","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/21584672fd699abe1768241d6c501b2de6139b6a","name":"https://git.kernel.org/stable/c/21584672fd699abe1768241d6c501b2de6139b6a","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-64490","name":"CVE Program record","refsource":"CVE.ORG","tags":["canonical"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-64490","name":"NVD vulnerability detail","refsource":"NVD","tags":["canonical","analysis"]}],"affected":[{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected d6568e3de42dd971a1356f7ba581e6600d53f0a0 3243563f99ef5d3949b934bd6390a5679405d0e1 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected d6568e3de42dd971a1356f7ba581e6600d53f0a0 5da9742de22db0dbaa8d414214ab5e1bedde00f9 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected d6568e3de42dd971a1356f7ba581e6600d53f0a0 21584672fd699abe1768241d6c501b2de6139b6a git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected d6568e3de42dd971a1356f7ba581e6600d53f0a0 c77a6cbb36ff8cbc1f084d94f8dcda5250935271 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 6.9","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.9 semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.12.96 6.12.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.18.39 6.18.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 7.1.4 7.1.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 7.2-rc1 * original_commit_for_fix","platforms":[]}],"timeline":[],"solutions":[],"workarounds":[],"exploits":[],"credits":[],"nvd_cpes":[],"vendor_comments":[],"enrichments":{"kev":null,"epss":{"cve_year":"2026","cve_id":"64490","cve":"CVE-2026-64490","epss":"0.002090000","percentile":"0.111720000","score_date":"2026-07-25","updated_at":"2026-07-26 00:12:33"},"legacy_qids":[]},"source_records":{"cve_program":{"containers":{"cna":{"affected":[{"defaultStatus":"unaffected","product":"Linux","programFiles":["sound/virtio/virtio_kctl.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"lessThan":"3243563f99ef5d3949b934bd6390a5679405d0e1","status":"affected","version":"d6568e3de42dd971a1356f7ba581e6600d53f0a0","versionType":"git"},{"lessThan":"5da9742de22db0dbaa8d414214ab5e1bedde00f9","status":"affected","version":"d6568e3de42dd971a1356f7ba581e6600d53f0a0","versionType":"git"},{"lessThan":"21584672fd699abe1768241d6c501b2de6139b6a","status":"affected","version":"d6568e3de42dd971a1356f7ba581e6600d53f0a0","versionType":"git"},{"lessThan":"c77a6cbb36ff8cbc1f084d94f8dcda5250935271","status":"affected","version":"d6568e3de42dd971a1356f7ba581e6600d53f0a0","versionType":"git"}]},{"defaultStatus":"affected","product":"Linux","programFiles":["sound/virtio/virtio_kctl.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"status":"affected","version":"6.9"},{"lessThan":"6.9","status":"unaffected","version":"0","versionType":"semver"},{"lessThanOrEqual":"6.12.*","status":"unaffected","version":"6.12.96","versionType":"semver"},{"lessThanOrEqual":"6.18.*","status":"unaffected","version":"6.18.39","versionType":"semver"},{"lessThanOrEqual":"7.1.*","status":"unaffected","version":"7.1.4","versionType":"semver"},{"lessThanOrEqual":"*","status":"unaffected","version":"7.2-rc1","versionType":"original_commit_for_fix"}]}],"cpeApplicability":[{"nodes":[{"cpeMatch":[{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.12.96","versionStartIncluding":"6.9","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.18.39","versionStartIncluding":"6.9","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"7.1.4","versionStartIncluding":"6.9","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"7.2-rc1","versionStartIncluding":"6.9","vulnerable":true}],"negate":false,"operator":"OR"}]}],"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."}],"providerMetadata":{"dateUpdated":"2026-07-25T08:51:48.877Z","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux"},"references":[{"url":"https://git.kernel.org/stable/c/3243563f99ef5d3949b934bd6390a5679405d0e1"},{"url":"https://git.kernel.org/stable/c/5da9742de22db0dbaa8d414214ab5e1bedde00f9"},{"url":"https://git.kernel.org/stable/c/21584672fd699abe1768241d6c501b2de6139b6a"},{"url":"https://git.kernel.org/stable/c/c77a6cbb36ff8cbc1f084d94f8dcda5250935271"}],"title":"ALSA: virtio: Validate control metadata from the device","x_generator":{"engine":"bippy-1.2.0"}}},"cveMetadata":{"assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","assignerShortName":"Linux","cveId":"CVE-2026-64490","datePublished":"2026-07-25T08:51:48.877Z","dateReserved":"2026-07-19T15:36:31.792Z","dateUpdated":"2026-07-25T08:51:48.877Z","state":"PUBLISHED"},"dataType":"CVE_RECORD","dataVersion":"5.2"},"nvd":{"publishedDate":"2026-07-25 10:17:34","lastModifiedDate":"2026-07-25 10:17:34","problem_types":[],"metrics":[],"configurations":[]},"legacy_mitre":{"record":{"CveYear":"2026","CveId":"64490","Ordinal":"1","Title":"ALSA: virtio: Validate control metadata from the device","CVE":"CVE-2026-64490","Year":"2026"},"notes":[{"CveYear":"2026","CveId":"64490","Ordinal":"1","NoteData":"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.","Type":"Description","Title":"ALSA: virtio: Validate control metadata from the device"}]}}}