{"id":"CVE-2026-64217","summary":"netfs: Fix overrun check in netfs_extract_user_iter()","details":"In the Linux kernel, the following vulnerability has been resolved:\n\nnetfs: Fix overrun check in netfs_extract_user_iter()\n\nFix netfs_extract_user_iter() so that if iov_iter_extract_pages() overfills\npages[], then those pages don't get included in the iterator constructed at\nthe end of the function.  If there was an overfill, memory corruption has\nalready happened.","modified":"2026-07-28T04:02:28.163817480Z","published":"2026-07-24T15:23:05.261Z","database_specific":{"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/64xxx/CVE-2026-64217.json","cna_assigner":"Linux"},"references":[{"type":"WEB","url":"https://git.kernel.org/stable/c/00efe58bbdcc93272d579ca24bfc912563f4a204"},{"type":"WEB","url":"https://git.kernel.org/stable/c/0ef37eef83fad3542ee06db2940433ae1a92b39d"},{"type":"WEB","url":"https://git.kernel.org/stable/c/96cc3beb2390ba9f9c128c5733c0ccfe450dd4f9"},{"type":"WEB","url":"https://git.kernel.org/stable/c/afeb32d9bf9aaeea51d0f723a19f14afb73bd94d"},{"type":"WEB","url":"https://git.kernel.org/stable/c/f48b9157f0f611fa436c360648603d5ded719b12"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/64xxx/CVE-2026-64217.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-64217"},{"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":"85dd2c8ff368b1446be9febde84afe1d7aec4261"},{"fixed":"00efe58bbdcc93272d579ca24bfc912563f4a204"},{"fixed":"96cc3beb2390ba9f9c128c5733c0ccfe450dd4f9"},{"fixed":"afeb32d9bf9aaeea51d0f723a19f14afb73bd94d"},{"fixed":"f48b9157f0f611fa436c360648603d5ded719b12"},{"fixed":"0ef37eef83fad3542ee06db2940433ae1a92b39d"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-64217.json"}},{"package":{"name":"Kernel","ecosystem":"Linux"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"6.3.0"},{"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/cve-osv-conversion/osv-output/CVE-2026-64217.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"}]}