{"id":"CVE-2026-64156","summary":"netfs, afs: Fix write skipping in dir/link writepages","details":"In the Linux kernel, the following vulnerability has been resolved:\n\nnetfs, afs: Fix write skipping in dir/link writepages\n\nFix netfs_write_single() and afs_single_writepages() to better handle a\nwrite that would be skipped due to lock contention and WB_SYNC_NONE by\nreturning 1 from netfs_write_single() if it skipped and making\nafs_single_writepages() skip also.  If a skip occurs, the inode must be\nre-marked as the VFS may have cleared the mark.\n\nThis is really only theoretical for directories in netfs_write_single() as\nthe only path to that is through afs_single_writepages() that takes the\n-\u003evalidate_lock around it, thereby serialising it.","modified":"2026-07-21T03:47:52.022531076Z","published":"2026-07-19T15:40:44.277Z","database_specific":{"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/64xxx/CVE-2026-64156.json","cna_assigner":"Linux"},"references":[{"type":"WEB","url":"https://git.kernel.org/stable/c/77bb293049d61e04c12b24ebbffafaf5ab36af90"},{"type":"WEB","url":"https://git.kernel.org/stable/c/9871938f99cc6cb266a77265491660e2375271f5"},{"type":"WEB","url":"https://git.kernel.org/stable/c/f91e10435c0dd37c48b1b25e6236284f656ddc0c"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/64xxx/CVE-2026-64156.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-64156"},{"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":"6dd80936618c4ff852d4db73aca400351d9bd9f0"},{"fixed":"77bb293049d61e04c12b24ebbffafaf5ab36af90"},{"fixed":"f91e10435c0dd37c48b1b25e6236284f656ddc0c"},{"fixed":"9871938f99cc6cb266a77265491660e2375271f5"}]}],"database_specific":{"source":"https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2026-64156.json"}},{"package":{"name":"Kernel","ecosystem":"Linux"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"6.14.0"},{"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-2026-64156.json"}}],"schema_version":"1.7.5"}