{"api_version":"1","generated_at":"2026-08-15T18:28:09+00:00","cve":"CVE-2026-72196","urls":{"html":"https://cve.report/CVE-2026-72196","api":"https://cve.report/api/cve/CVE-2026-72196.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2026-72196","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-72196"},"summary":{"title":"fs/ntfs3: bound copy_lcns dp->page_lcns[] index in analysis pass","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nfs/ntfs3: bound copy_lcns dp->page_lcns[] index in analysis pass\n\nIn log_replay()'s analysis pass, after find_dp() returns a\nvalid DIR_PAGE_ENTRY for the (target_attr, target_vcn) tuple,\nthe copy_lcns block walks lrh->lcns_follow further entries:\n\n\tt16 = le16_to_cpu(lrh->lcns_follow);\n\tfor (i = 0; i < t16; i++) {\n\t    size_t j = (size_t)(le64_to_cpu(lrh->target_vcn) -\n\t                        le64_to_cpu(dp->vcn));\n\t    dp->page_lcns[j + i] = lrh->page_lcns[i];\n\t}\n\nfind_dp() only validates that target_vcn falls within\n[dp->vcn, dp->vcn + dp->lcns_follow), i.e., that the FIRST\ncluster is covered.  The walk through the further entries is\nnot bounded against dp->lcns_follow.  For a malformed LRH\nwhere target_vcn = dp->vcn + dp->lcns_follow - 1 and\nlrh->lcns_follow > 1, the i > 0 writes overflow the dp's\nallocated page_lcns[] array.\n\nAdd the missing j + lrh->lcns_follow <= dp->lcns_follow guard.\n\nReproduced under UML+KASAN on mainline 8d90b09e6741 as a\nslab-out-of-bounds write of size 8 from log_replay+0x68d4 on\nthe mount path.\n\nThis is distinct from Pavitra Jha's 2026-05-02 patch\n(\"fs/ntfs3: validate lcns_follow in log_replay conversion\",\n<20260502154252.164586-1-jhapavitra98@gmail.com>) which\naddresses the separate version-0 dirty-page-table conversion\npath's memmove(&dp->vcn, ...) call.  The two fixes are\ncomplementary; both should land.\n\n[almaz.alexandrovich@paragon-software.com: clang-formatted the changes,\nfixed conflicts]","state":"PUBLISHED","assigner":"Linux","published_at":"2026-08-15 06:21:38","updated_at":"2026-08-15 06:21:38"},"problem_types":[],"metrics":[],"references":[{"url":"https://git.kernel.org/stable/c/49c86dae0c0ccb8d98ddcdc46987259389c816dd","name":"https://git.kernel.org/stable/c/49c86dae0c0ccb8d98ddcdc46987259389c816dd","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/9b3d8cc9d54fcded4de51b2b1026ae7182512077","name":"https://git.kernel.org/stable/c/9b3d8cc9d54fcded4de51b2b1026ae7182512077","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/d240cd98f5f7b65c90f6b2b6abe3232ccdc405ab","name":"https://git.kernel.org/stable/c/d240cd98f5f7b65c90f6b2b6abe3232ccdc405ab","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/5e7b598660cfa8e5af172cf4c65cffc126333307","name":"https://git.kernel.org/stable/c/5e7b598660cfa8e5af172cf4c65cffc126333307","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/9b7c28d8c61bdb041936222a09a708531a1c2921","name":"https://git.kernel.org/stable/c/9b7c28d8c61bdb041936222a09a708531a1c2921","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/0f13e823bf86bd1800168ea0bb5bca8b8500a81c","name":"https://git.kernel.org/stable/c/0f13e823bf86bd1800168ea0bb5bca8b8500a81c","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-72196","name":"CVE Program record","refsource":"CVE.ORG","tags":["canonical"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-72196","name":"NVD vulnerability detail","refsource":"NVD","tags":["canonical","analysis"]}],"affected":[{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected b46acd6a6a627d876898e1c84d3f84902264b445 9b3d8cc9d54fcded4de51b2b1026ae7182512077 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected b46acd6a6a627d876898e1c84d3f84902264b445 9b7c28d8c61bdb041936222a09a708531a1c2921 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected b46acd6a6a627d876898e1c84d3f84902264b445 0f13e823bf86bd1800168ea0bb5bca8b8500a81c git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected b46acd6a6a627d876898e1c84d3f84902264b445 d240cd98f5f7b65c90f6b2b6abe3232ccdc405ab git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected b46acd6a6a627d876898e1c84d3f84902264b445 49c86dae0c0ccb8d98ddcdc46987259389c816dd git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected b46acd6a6a627d876898e1c84d3f84902264b445 5e7b598660cfa8e5af172cf4c65cffc126333307 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 5.15","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 5.15 semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.1.178 6.1.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.6.145 6.6.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.12.97 6.12.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.18.40 6.18.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 7.1.5 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":null,"legacy_qids":[]},"source_records":{"cve_program":{"containers":{"cna":{"affected":[{"defaultStatus":"unaffected","product":"Linux","programFiles":["fs/ntfs3/fslog.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"lessThan":"9b3d8cc9d54fcded4de51b2b1026ae7182512077","status":"affected","version":"b46acd6a6a627d876898e1c84d3f84902264b445","versionType":"git"},{"lessThan":"9b7c28d8c61bdb041936222a09a708531a1c2921","status":"affected","version":"b46acd6a6a627d876898e1c84d3f84902264b445","versionType":"git"},{"lessThan":"0f13e823bf86bd1800168ea0bb5bca8b8500a81c","status":"affected","version":"b46acd6a6a627d876898e1c84d3f84902264b445","versionType":"git"},{"lessThan":"d240cd98f5f7b65c90f6b2b6abe3232ccdc405ab","status":"affected","version":"b46acd6a6a627d876898e1c84d3f84902264b445","versionType":"git"},{"lessThan":"49c86dae0c0ccb8d98ddcdc46987259389c816dd","status":"affected","version":"b46acd6a6a627d876898e1c84d3f84902264b445","versionType":"git"},{"lessThan":"5e7b598660cfa8e5af172cf4c65cffc126333307","status":"affected","version":"b46acd6a6a627d876898e1c84d3f84902264b445","versionType":"git"}]},{"defaultStatus":"affected","product":"Linux","programFiles":["fs/ntfs3/fslog.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"status":"affected","version":"5.15"},{"lessThan":"5.15","status":"unaffected","version":"0","versionType":"semver"},{"lessThanOrEqual":"6.1.*","status":"unaffected","version":"6.1.178","versionType":"semver"},{"lessThanOrEqual":"6.6.*","status":"unaffected","version":"6.6.145","versionType":"semver"},{"lessThanOrEqual":"6.12.*","status":"unaffected","version":"6.12.97","versionType":"semver"},{"lessThanOrEqual":"6.18.*","status":"unaffected","version":"6.18.40","versionType":"semver"},{"lessThanOrEqual":"7.1.*","status":"unaffected","version":"7.1.5","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":"6.1.178","versionStartIncluding":"5.15","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.6.145","versionStartIncluding":"5.15","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.12.97","versionStartIncluding":"5.15","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.18.40","versionStartIncluding":"5.15","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"7.1.5","versionStartIncluding":"5.15","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"7.2-rc1","versionStartIncluding":"5.15","vulnerable":true}],"negate":false,"operator":"OR"}]}],"descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nfs/ntfs3: bound copy_lcns dp->page_lcns[] index in analysis pass\n\nIn log_replay()'s analysis pass, after find_dp() returns a\nvalid DIR_PAGE_ENTRY for the (target_attr, target_vcn) tuple,\nthe copy_lcns block walks lrh->lcns_follow further entries:\n\n\tt16 = le16_to_cpu(lrh->lcns_follow);\n\tfor (i = 0; i < t16; i++) {\n\t    size_t j = (size_t)(le64_to_cpu(lrh->target_vcn) -\n\t                        le64_to_cpu(dp->vcn));\n\t    dp->page_lcns[j + i] = lrh->page_lcns[i];\n\t}\n\nfind_dp() only validates that target_vcn falls within\n[dp->vcn, dp->vcn + dp->lcns_follow), i.e., that the FIRST\ncluster is covered.  The walk through the further entries is\nnot bounded against dp->lcns_follow.  For a malformed LRH\nwhere target_vcn = dp->vcn + dp->lcns_follow - 1 and\nlrh->lcns_follow > 1, the i > 0 writes overflow the dp's\nallocated page_lcns[] array.\n\nAdd the missing j + lrh->lcns_follow <= dp->lcns_follow guard.\n\nReproduced under UML+KASAN on mainline 8d90b09e6741 as a\nslab-out-of-bounds write of size 8 from log_replay+0x68d4 on\nthe mount path.\n\nThis is distinct from Pavitra Jha's 2026-05-02 patch\n(\"fs/ntfs3: validate lcns_follow in log_replay conversion\",\n<20260502154252.164586-1-jhapavitra98@gmail.com>) which\naddresses the separate version-0 dirty-page-table conversion\npath's memmove(&dp->vcn, ...) call.  The two fixes are\ncomplementary; both should land.\n\n[almaz.alexandrovich@paragon-software.com: clang-formatted the changes,\nfixed conflicts]"}],"providerMetadata":{"dateUpdated":"2026-08-15T05:53:55.509Z","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux"},"references":[{"url":"https://git.kernel.org/stable/c/9b3d8cc9d54fcded4de51b2b1026ae7182512077"},{"url":"https://git.kernel.org/stable/c/9b7c28d8c61bdb041936222a09a708531a1c2921"},{"url":"https://git.kernel.org/stable/c/0f13e823bf86bd1800168ea0bb5bca8b8500a81c"},{"url":"https://git.kernel.org/stable/c/d240cd98f5f7b65c90f6b2b6abe3232ccdc405ab"},{"url":"https://git.kernel.org/stable/c/49c86dae0c0ccb8d98ddcdc46987259389c816dd"},{"url":"https://git.kernel.org/stable/c/5e7b598660cfa8e5af172cf4c65cffc126333307"}],"title":"fs/ntfs3: bound copy_lcns dp->page_lcns[] index in analysis pass","x_generator":{"engine":"bippy-1.2.0"}}},"cveMetadata":{"assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","assignerShortName":"Linux","cveId":"CVE-2026-72196","datePublished":"2026-08-15T05:53:55.509Z","dateReserved":"2026-08-09T03:40:39.911Z","dateUpdated":"2026-08-15T05:53:55.509Z","state":"PUBLISHED"},"dataType":"CVE_RECORD","dataVersion":"5.2"},"nvd":{"publishedDate":"2026-08-15 06:21:38","lastModifiedDate":"2026-08-15 06:21:38","problem_types":[],"metrics":[],"configurations":[]},"legacy_mitre":{"record":{"CveYear":"2026","CveId":"72196","Ordinal":"1","Title":"fs/ntfs3: bound copy_lcns dp->page_lcns[] index in analysis pass","CVE":"CVE-2026-72196","Year":"2026"},"notes":[{"CveYear":"2026","CveId":"72196","Ordinal":"1","NoteData":"In the Linux kernel, the following vulnerability has been resolved:\n\nfs/ntfs3: bound copy_lcns dp->page_lcns[] index in analysis pass\n\nIn log_replay()'s analysis pass, after find_dp() returns a\nvalid DIR_PAGE_ENTRY for the (target_attr, target_vcn) tuple,\nthe copy_lcns block walks lrh->lcns_follow further entries:\n\n\tt16 = le16_to_cpu(lrh->lcns_follow);\n\tfor (i = 0; i < t16; i++) {\n\t    size_t j = (size_t)(le64_to_cpu(lrh->target_vcn) -\n\t                        le64_to_cpu(dp->vcn));\n\t    dp->page_lcns[j + i] = lrh->page_lcns[i];\n\t}\n\nfind_dp() only validates that target_vcn falls within\n[dp->vcn, dp->vcn + dp->lcns_follow), i.e., that the FIRST\ncluster is covered.  The walk through the further entries is\nnot bounded against dp->lcns_follow.  For a malformed LRH\nwhere target_vcn = dp->vcn + dp->lcns_follow - 1 and\nlrh->lcns_follow > 1, the i > 0 writes overflow the dp's\nallocated page_lcns[] array.\n\nAdd the missing j + lrh->lcns_follow <= dp->lcns_follow guard.\n\nReproduced under UML+KASAN on mainline 8d90b09e6741 as a\nslab-out-of-bounds write of size 8 from log_replay+0x68d4 on\nthe mount path.\n\nThis is distinct from Pavitra Jha's 2026-05-02 patch\n(\"fs/ntfs3: validate lcns_follow in log_replay conversion\",\n<20260502154252.164586-1-jhapavitra98@gmail.com>) which\naddresses the separate version-0 dirty-page-table conversion\npath's memmove(&dp->vcn, ...) call.  The two fixes are\ncomplementary; both should land.\n\n[almaz.alexandrovich@paragon-software.com: clang-formatted the changes,\nfixed conflicts]","Type":"Description","Title":"fs/ntfs3: bound copy_lcns dp->page_lcns[] index in analysis pass"}]}}}