{"api_version":"1","generated_at":"2026-08-02T06:44:13+00:00","cve":"CVE-2026-64357","urls":{"html":"https://cve.report/CVE-2026-64357","api":"https://cve.report/api/cve/CVE-2026-64357.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2026-64357","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-64357"},"summary":{"title":"xfs: fix exchmaps reservation limit check","description":"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->resblks.  That is the reservation value\nfrom before the overhead was added.\n\nThe computed value is stored back in req->resblks 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.","state":"PUBLISHED","assigner":"Linux","published_at":"2026-07-25 10:17:18","updated_at":"2026-07-25 10:17:18"},"problem_types":[],"metrics":[],"references":[{"url":"https://git.kernel.org/stable/c/0a5213bbff62b51c7d4999ac8c7e11ea57d00d45","name":"https://git.kernel.org/stable/c/0a5213bbff62b51c7d4999ac8c7e11ea57d00d45","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/a62ef2d13d6e7270dd5e88c6082bf2d0edcd5112","name":"https://git.kernel.org/stable/c/a62ef2d13d6e7270dd5e88c6082bf2d0edcd5112","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/4707344b0d36d1012c8a1716e20167cd3afdd5f1","name":"https://git.kernel.org/stable/c/4707344b0d36d1012c8a1716e20167cd3afdd5f1","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/c597c8580d50127fc1221b5a5b653a94d49e23e3","name":"https://git.kernel.org/stable/c/c597c8580d50127fc1221b5a5b653a94d49e23e3","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-64357","name":"CVE Program record","refsource":"CVE.ORG","tags":["canonical"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-64357","name":"NVD vulnerability detail","refsource":"NVD","tags":["canonical","analysis"]}],"affected":[{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 966ceafc7a437105ecfe1cadb3747b2965a260ca c597c8580d50127fc1221b5a5b653a94d49e23e3 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 966ceafc7a437105ecfe1cadb3747b2965a260ca a62ef2d13d6e7270dd5e88c6082bf2d0edcd5112 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 966ceafc7a437105ecfe1cadb3747b2965a260ca 4707344b0d36d1012c8a1716e20167cd3afdd5f1 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 966ceafc7a437105ecfe1cadb3747b2965a260ca 0a5213bbff62b51c7d4999ac8c7e11ea57d00d45 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 6.10","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.10 semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.12.96 6.12.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.18.39 6.18.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 7.1.4 7.1.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 7.2-rc1 * original_commit_for_fix","platforms":[]}],"timeline":[],"solutions":[],"workarounds":[],"exploits":[],"credits":[],"nvd_cpes":[],"vendor_comments":[],"enrichments":{"kev":null,"epss":{"cve_year":"2026","cve_id":"64357","cve":"CVE-2026-64357","epss":"0.001680000","percentile":"0.064570000","score_date":"2026-07-28","updated_at":"2026-07-29 00:05:33"},"legacy_qids":[]},"source_records":{"cve_program":{"containers":{"cna":{"affected":[{"defaultStatus":"unaffected","product":"Linux","programFiles":["fs/xfs/libxfs/xfs_exchmaps.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"lessThan":"c597c8580d50127fc1221b5a5b653a94d49e23e3","status":"affected","version":"966ceafc7a437105ecfe1cadb3747b2965a260ca","versionType":"git"},{"lessThan":"a62ef2d13d6e7270dd5e88c6082bf2d0edcd5112","status":"affected","version":"966ceafc7a437105ecfe1cadb3747b2965a260ca","versionType":"git"},{"lessThan":"4707344b0d36d1012c8a1716e20167cd3afdd5f1","status":"affected","version":"966ceafc7a437105ecfe1cadb3747b2965a260ca","versionType":"git"},{"lessThan":"0a5213bbff62b51c7d4999ac8c7e11ea57d00d45","status":"affected","version":"966ceafc7a437105ecfe1cadb3747b2965a260ca","versionType":"git"}]},{"defaultStatus":"affected","product":"Linux","programFiles":["fs/xfs/libxfs/xfs_exchmaps.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"status":"affected","version":"6.10"},{"lessThan":"6.10","status":"unaffected","version":"0","versionType":"semver"},{"lessThanOrEqual":"6.12.*","status":"unaffected","version":"6.12.96","versionType":"semver"},{"lessThanOrEqual":"6.18.*","status":"unaffected","version":"6.18.39","versionType":"semver"},{"lessThanOrEqual":"7.1.*","status":"unaffected","version":"7.1.4","versionType":"semver"},{"lessThanOrEqual":"*","status":"unaffected","version":"7.2-rc1","versionType":"original_commit_for_fix"}]}],"cpeApplicability":[{"nodes":[{"cpeMatch":[{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.12.96","versionStartIncluding":"6.10","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.18.39","versionStartIncluding":"6.10","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"7.1.4","versionStartIncluding":"6.10","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"7.2-rc1","versionStartIncluding":"6.10","vulnerable":true}],"negate":false,"operator":"OR"}]}],"descriptions":[{"lang":"en","value":"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->resblks.  That is the reservation value\nfrom before the overhead was added.\n\nThe computed value is stored back in req->resblks 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."}],"providerMetadata":{"dateUpdated":"2026-07-25T08:50:14.676Z","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux"},"references":[{"url":"https://git.kernel.org/stable/c/c597c8580d50127fc1221b5a5b653a94d49e23e3"},{"url":"https://git.kernel.org/stable/c/a62ef2d13d6e7270dd5e88c6082bf2d0edcd5112"},{"url":"https://git.kernel.org/stable/c/4707344b0d36d1012c8a1716e20167cd3afdd5f1"},{"url":"https://git.kernel.org/stable/c/0a5213bbff62b51c7d4999ac8c7e11ea57d00d45"}],"title":"xfs: fix exchmaps reservation limit check","x_generator":{"engine":"bippy-1.2.0"}}},"cveMetadata":{"assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","assignerShortName":"Linux","cveId":"CVE-2026-64357","datePublished":"2026-07-25T08:50:14.676Z","dateReserved":"2026-07-19T15:36:31.782Z","dateUpdated":"2026-07-25T08:50:14.676Z","state":"PUBLISHED"},"dataType":"CVE_RECORD","dataVersion":"5.2"},"nvd":{"publishedDate":"2026-07-25 10:17:18","lastModifiedDate":"2026-07-25 10:17:18","problem_types":[],"metrics":[],"configurations":[]},"legacy_mitre":{"record":{"CveYear":"2026","CveId":"64357","Ordinal":"1","Title":"xfs: fix exchmaps reservation limit check","CVE":"CVE-2026-64357","Year":"2026"},"notes":[{"CveYear":"2026","CveId":"64357","Ordinal":"1","NoteData":"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->resblks.  That is the reservation value\nfrom before the overhead was added.\n\nThe computed value is stored back in req->resblks 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.","Type":"Description","Title":"xfs: fix exchmaps reservation limit check"}]}}}