{"id":"CVE-2026-64134","summary":"ALSA: pcm: Don't setup bogus iov_iter for silencing","details":"In the Linux kernel, the following vulnerability has been resolved:\n\nALSA: pcm: Don't setup bogus iov_iter for silencing\n\nAt transition to the iov_iter for PCM data transfer, we blindly\napplied the iov_iter setup also for silencing (i.e. data = NULL), and\nit leads to a calculation of bogus iov_iter.  Fortunately this didn't\ncause troubles on most of architectures but it goes wrong on RISC-V\nnow, causing a NULL dereference.\n\nHandle the NULL data case to treat the silencing in interleaved_copy()\nfor addressing the bug above.  noninterleaved_copy() has already the\nNULL data handling, so it doesn't need changes.","modified":"2026-07-22T03:31:59.391411532Z","published":"2026-07-19T15:40:28.974Z","database_specific":{"cna_assigner":"Linux","osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/64xxx/CVE-2026-64134.json"},"references":[{"type":"WEB","url":"https://git.kernel.org/stable/c/41a766c647294842c9b17672449f8e011048cba9"},{"type":"WEB","url":"https://git.kernel.org/stable/c/c9f6768515818d71bdfc20119a81f3332c53b9c6"},{"type":"WEB","url":"https://git.kernel.org/stable/c/ce836587e594af39ff048d9b29dee0f5f10692c9"},{"type":"WEB","url":"https://git.kernel.org/stable/c/e4d3386b74fba8e01280484b67ee481ece00201e"},{"type":"WEB","url":"https://git.kernel.org/stable/c/feff0251386aa6bb180a0a1cf7c1f91ba868113d"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/64xxx/CVE-2026-64134.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-64134"},{"type":"PACKAGE","url":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"cf393babb37a1679a1ec1d864df1090353465e23"},{"fixed":"41a766c647294842c9b17672449f8e011048cba9"},{"fixed":"ce836587e594af39ff048d9b29dee0f5f10692c9"},{"fixed":"feff0251386aa6bb180a0a1cf7c1f91ba868113d"},{"fixed":"c9f6768515818d71bdfc20119a81f3332c53b9c6"},{"fixed":"e4d3386b74fba8e01280484b67ee481ece00201e"}]}],"database_specific":{"source":"https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2026-64134.json"}},{"package":{"name":"Kernel","ecosystem":"Linux"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"6.6.0"},{"fixed":"6.6.142"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.7.0"},{"fixed":"6.12.92"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.13.0"},{"fixed":"6.18.34"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.19.0"},{"fixed":"7.0.11"}]}],"database_specific":{"source":"https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2026-64134.json"}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H"}]}