{"id":"CVE-2026-64490","revision":"e43e1bc47fc14e82806eeab63e810d34","records":[{"revision":"e43e1bc47fc14e82806eeab63e810d34","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2026-64490","aliases":[],"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":0,"publishedAt":"2026-07-25T08:51:48.877+00:00","modifiedAt":"2026-10-19T20:48:37.167+00:00","affected":[{"ecosystem":"Vendor product","name":"Linux","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"product\": \"Linux\",\n                    \"vendor\": \"Linux\",\n                    \"defaultStatus\": \"unaffected\",\n                    \"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\n                    \"programFiles\": [\n                        \"sound/virtio/virtio_kctl.c\"\n                    ],\n                    \"versions\": [\n                        {\n                            \"version\": \"d6568e3de42dd971a1356f7ba581e6600d53f0a0\",\n                            \"lessThan\": \"3243563f99ef5d3949b934bd6390a5679405d0e1\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"d6568e3de42dd971a1356f7ba581e6600d53f0a0\",\n                            \"lessThan\": \"5da9742de22db0dbaa8d414214ab5e1bedde00f9\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"d6568e3de42dd971a1356f7ba581e6600d53f0a0\",\n                            \"lessThan\": \"21584672fd699abe1768241d6c501b2de6139b6a\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"d6568e3de42dd971a1356f7ba581e6600d53f0a0\",\n                            \"lessThan\": \"c77a6cbb36ff8cbc1f084d94f8dcda5250935271\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        }\n                    ]\n                }"},{"ecosystem":"Vendor product","name":"Linux","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"product\": \"Linux\",\n                    \"vendor\": \"Linux\",\n                    \"defaultStatus\": \"affected\",\n                    \"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\n                    \"programFiles\": [\n                        \"sound/virtio/virtio_kctl.c\"\n                    ],\n                    \"versions\": [\n                        {\n                            \"version\": \"6.9\",\n                            \"status\": \"affected\"\n                        },\n                        {\n                            \"version\": \"0\",\n                            \"lessThan\": \"6.9\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.12.96\",\n                            \"lessThanOrEqual\": \"6.12.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.18.39\",\n                            \"lessThanOrEqual\": \"6.18.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"7.1.4\",\n                            \"lessThanOrEqual\": \"7.1.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"7.2\",\n                            \"lessThanOrEqual\": \"*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"original_commit_for_fix\"\n                        }\n                    ]\n                }"}],"metrics":[{"system":"CVSS 3.1","vector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","score":8.4,"severity":"HIGH"}],"references":["https://git.kernel.org/stable/c/3243563f99ef5d3949b934bd6390a5679405d0e1","https://git.kernel.org/stable/c/5da9742de22db0dbaa8d414214ab5e1bedde00f9","https://git.kernel.org/stable/c/21584672fd699abe1768241d6c501b2de6139b6a","https://git.kernel.org/stable/c/c77a6cbb36ff8cbc1f084d94f8dcda5250935271"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-64490","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-64490","identifiers":["CVE-2026-64490"]},"retained":false,"historicalAffected":[]}],"coverage":[]}