{"schema_version":"1.9.0","id":"CVE-2026-64600","published":"2026-07-23T05:46:56.149Z","modified":"2026-09-04T18:25:57.578758852Z","related":["SUSE-SU-2026:23066-1","SUSE-SU-2026:23068-1","SUSE-SU-2026:23193-1","SUSE-SU-2026:23194-1","SUSE-SU-2026:23221-1","SUSE-SU-2026:23231-1","SUSE-SU-2026:23237-1","SUSE-SU-2026:23241-1","SUSE-SU-2026:23244-1","SUSE-SU-2026:23257-1","SUSE-SU-2026:23258-1","SUSE-SU-2026:23259-1","SUSE-SU-2026:23260-1","SUSE-SU-2026:23261-1","SUSE-SU-2026:23262-1","SUSE-SU-2026:23263-1","SUSE-SU-2026:23264-1","SUSE-SU-2026:23265-1","SUSE-SU-2026:23266-1","SUSE-SU-2026:23267-1","SUSE-SU-2026:23268-1","SUSE-SU-2026:23269-1","SUSE-SU-2026:23270-1","SUSE-SU-2026:23271-1","SUSE-SU-2026:23272-1","SUSE-SU-2026:23279-1","SUSE-SU-2026:23280-1","SUSE-SU-2026:23281-1","SUSE-SU-2026:23282-1","SUSE-SU-2026:23283-1","SUSE-SU-2026:23284-1","SUSE-SU-2026:23285-1","SUSE-SU-2026:23286-1","SUSE-SU-2026:23287-1","SUSE-SU-2026:23288-1","SUSE-SU-2026:23290-1","SUSE-SU-2026:23291-1","SUSE-SU-2026:23292-1","SUSE-SU-2026:23293-1","SUSE-SU-2026:23295-1","SUSE-SU-2026:23296-1","SUSE-SU-2026:3593-1","SUSE-SU-2026:3594-1","SUSE-SU-2026:3595-1","SUSE-SU-2026:3602-1","SUSE-SU-2026:3616-1","SUSE-SU-2026:3617-1","SUSE-SU-2026:3689-1","SUSE-SU-2026:3694-1","SUSE-SU-2026:3696-1","SUSE-SU-2026:3697-1","SUSE-SU-2026:3698-1","SUSE-SU-2026:3699-1","SUSE-SU-2026:3700-1","SUSE-SU-2026:3701-1","SUSE-SU-2026:3702-1","SUSE-SU-2026:3703-1","SUSE-SU-2026:3704-1","SUSE-SU-2026:3706-1","SUSE-SU-2026:3707-1","SUSE-SU-2026:3708-1","SUSE-SU-2026:3709-1","SUSE-SU-2026:3710-1","SUSE-SU-2026:3715-1","SUSE-SU-2026:3717-1","SUSE-SU-2026:3719-1","SUSE-SU-2026:3721-1","SUSE-SU-2026:3722-1","SUSE-SU-2026:3723-1","SUSE-SU-2026:3724-1","SUSE-SU-2026:3726-1","SUSE-SU-2026:3728-1","SUSE-SU-2026:3729-1","SUSE-SU-2026:3734-1","SUSE-SU-2026:3739-1","SUSE-SU-2026:3740-1","SUSE-SU-2026:3743-1","SUSE-SU-2026:3744-1","SUSE-SU-2026:3746-1","SUSE-SU-2026:3747-1","SUSE-SU-2026:3748-1","SUSE-SU-2026:3749-1","SUSE-SU-2026:3750-1","SUSE-SU-2026:3754-1","SUSE-SU-2026:3756-1","SUSE-SU-2026:3757-1","SUSE-SU-2026:3759-1","SUSE-SU-2026:3760-1","SUSE-SU-2026:3761-1","SUSE-SU-2026:3766-1","SUSE-SU-2026:3768-1","SUSE-SU-2026:3770-1","SUSE-SU-2026:3771-1","SUSE-SU-2026:3774-1","SUSE-SU-2026:3775-1","SUSE-SU-2026:3776-1","SUSE-SU-2026:3777-1","SUSE-SU-2026:3778-1","SUSE-SU-2026:3779-1","SUSE-SU-2026:3780-1","SUSE-SU-2026:3781-1","SUSE-SU-2026:3790-1","SUSE-SU-2026:3807-1","SUSE-SU-2026:3808-1","SUSE-SU-2026:3810-1","SUSE-SU-2026:3819-1","SUSE-SU-2026:3820-1","SUSE-SU-2026:3821-1","SUSE-SU-2026:3826-1","SUSE-SU-2026:3829-1","openSUSE-SU-2026:11476-1","openSUSE-SU-2026:21555-1"],"summary":"xfs: resample the data fork mapping after cycling ILOCK","details":"In the Linux kernel, the following vulnerability has been resolved:\n\nxfs: resample the data fork mapping after cycling ILOCK\n\nxfs_reflink_fill_{cow_hole,delalloc} are both presented with an inode,\na data fork mapping, and a cow fork mapping.  Unfortunately, these two\nhelpers cycle the ILOCK to grab a transaction, which means that the\nmappings are stale as soon as we reacquire the ILOCK.  Currently we\nrefresh the cow fork mapping by re-calling xfs_find_trim_cow_extent, but\nwe don't refresh the data fork mapping beforehand, which means that the\nxfs_bmap_trim_cow in that function queries the refcount btree about the\nwrong physical blocks and returns an inaccurate value in *shared.\n\nIf *shared is now false, the directio write proceeds with a stale data\nfork mapping.  Fix this by querying the data fork mapping if the\nsequence counter changes across the ILOCK cycle.","affected":[{"ranges":[{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"3c68d44a2b49a0ac9165faa9c191e1e618c8a8d5"},{"fixed":"dc11be133efca5fe3a2fb02b016dee825cc12f18"},{"fixed":"b8c9aa832b52680ee40d6cab0efb081f9a69df05"},{"fixed":"50f0012da1040f69a4e788cd9aed587c9a04983f"},{"fixed":"e705d81a7193dd19e69b8e2bad4696d78a4ea075"},{"fixed":"206c09b04dc5469c7ff14d8aceff2d47c88078d9"},{"fixed":"44f891bc088958399eec27f7604928694aa35581"},{"fixed":"2f4acd0fcd862e22eab45690ec2c08c80b6ef2e7"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-64600.json"}},{"package":{"name":"Kernel","ecosystem":"Linux"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"4.11.0"},{"fixed":"5.15.212"}]},{"type":"ECOSYSTEM","events":[{"introduced":"5.16.0"},{"fixed":"6.1.178"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.2.0"},{"fixed":"6.6.145"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.7.0"},{"fixed":"6.12.96"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.13.0"},{"fixed":"6.18.39"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.19.0"},{"fixed":"7.1.4"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-64600.json"}}],"references":[{"type":"WEB","url":"http://www.openwall.com/lists/oss-security/2026/07/22/14"},{"type":"WEB","url":"http://www.openwall.com/lists/oss-security/2026/07/22/18"},{"type":"WEB","url":"http://www.openwall.com/lists/oss-security/2026/07/22/19"},{"type":"WEB","url":"http://www.openwall.com/lists/oss-security/2026/07/31/3"},{"type":"WEB","url":"http://www.openwall.com/lists/oss-security/2026/08/03/4"},{"type":"WEB","url":"http://www.openwall.com/lists/oss-security/2026/08/03/8"},{"type":"WEB","url":"https://git.kernel.org/stable/c/206c09b04dc5469c7ff14d8aceff2d47c88078d9"},{"type":"WEB","url":"https://git.kernel.org/stable/c/2f4acd0fcd862e22eab45690ec2c08c80b6ef2e7"},{"type":"WEB","url":"https://git.kernel.org/stable/c/44f891bc088958399eec27f7604928694aa35581"},{"type":"WEB","url":"https://git.kernel.org/stable/c/50f0012da1040f69a4e788cd9aed587c9a04983f"},{"type":"WEB","url":"https://git.kernel.org/stable/c/b8c9aa832b52680ee40d6cab0efb081f9a69df05"},{"type":"WEB","url":"https://git.kernel.org/stable/c/dc11be133efca5fe3a2fb02b016dee825cc12f18"},{"type":"WEB","url":"https://git.kernel.org/stable/c/e705d81a7193dd19e69b8e2bad4696d78a4ea075"},{"type":"ADVISORY","url":"https://cdn2.qualys.com/advisory/2026/07/22/RefluXFS.txt"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/64xxx/CVE-2026-64600.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-64600"},{"type":"PACKAGE","url":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"}],"database_specific":{"cna_assigner":"Linux","osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/64xxx/CVE-2026-64600.json"},"severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H"}]}