{"id":"CVE-2026-64357","summary":"xfs: fix exchmaps reservation limit check","details":"In the Linux kernel, the following vulnerability has been resolved:\n\nxfs: fix exchmaps reservation limit check\n\nxfs_exchmaps_estimate_overhead() adds the bmbt and rmapbt\noverhead to a local resblks variable, but the final UINT_MAX\ncheck still tests req-\u003eresblks.  That is the reservation value\nfrom before the overhead was added.\n\nThe computed value is stored back in req-\u003eresblks and later passed\nto xfs_trans_alloc(), whose block reservation argument is unsigned\nint.  Check the computed reservation so the existing limit applies\nto the value that will be used.","modified":"2026-07-27T04:03:21.569082885Z","published":"2026-07-25T08:50:14.676Z","database_specific":{"cna_assigner":"Linux","osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/64xxx/CVE-2026-64357.json"},"references":[{"type":"WEB","url":"https://git.kernel.org/stable/c/0a5213bbff62b51c7d4999ac8c7e11ea57d00d45"},{"type":"WEB","url":"https://git.kernel.org/stable/c/4707344b0d36d1012c8a1716e20167cd3afdd5f1"},{"type":"WEB","url":"https://git.kernel.org/stable/c/a62ef2d13d6e7270dd5e88c6082bf2d0edcd5112"},{"type":"WEB","url":"https://git.kernel.org/stable/c/c597c8580d50127fc1221b5a5b653a94d49e23e3"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/64xxx/CVE-2026-64357.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-64357"},{"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":"966ceafc7a437105ecfe1cadb3747b2965a260ca"},{"fixed":"c597c8580d50127fc1221b5a5b653a94d49e23e3"},{"fixed":"a62ef2d13d6e7270dd5e88c6082bf2d0edcd5112"},{"fixed":"4707344b0d36d1012c8a1716e20167cd3afdd5f1"},{"fixed":"0a5213bbff62b51c7d4999ac8c7e11ea57d00d45"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-64357.json"}},{"package":{"name":"Kernel","ecosystem":"Linux"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"6.10.0"},{"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-2026-64357.json"}}],"schema_version":"1.7.5"}