{"api_version":"1","generated_at":"2026-09-18T09:48:14+00:00","cve":"CVE-2026-92494","urls":{"html":"https://cve.report/CVE-2026-92494","api":"https://cve.report/api/cve/CVE-2026-92494.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2026-92494","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-92494"},"summary":{"title":"ext4: fix buffer_head leak in ext4_init_orphan_info","description":"In the Linux kernel, the following vulnerability has been resolved:\n\next4: fix buffer_head leak in ext4_init_orphan_info\n\next4_init_orphan_info() reads orphan file blocks with ext4_bread()\nand stores the returned buffer_head in oi->of_binfo[i].ob_bh.\n\nIf ext4_bread() succeeds but the orphan block magic or checksum\nvalidation fails, the function jumps to out_free. However, the old\nout_free loop starts releasing buffers from i - 1, so the current\nbuffer_head at index i is skipped.\n\nThis leaks the buffer_head reference obtained by ext4_bread() on the\nbad magic and bad checksum error paths.\n\nFix this by tracking the number of successfully read buffer_heads and\nreleasing exactly those buffer_heads on the error path.","state":"PUBLISHED","assigner":"Linux","published_at":"2026-09-17 17:17:51","updated_at":"2026-09-17 17:17:51"},"problem_types":[],"metrics":[],"references":[{"url":"https://git.kernel.org/stable/c/1399f102d8a1855c1a38506057306ec79d0787d9","name":"https://git.kernel.org/stable/c/1399f102d8a1855c1a38506057306ec79d0787d9","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/74637f7fef030e5fb2e835b7dfeb05efdc48e0fe","name":"https://git.kernel.org/stable/c/74637f7fef030e5fb2e835b7dfeb05efdc48e0fe","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/35fc83c65faf7949f5701bb34b20f822560a7718","name":"https://git.kernel.org/stable/c/35fc83c65faf7949f5701bb34b20f822560a7718","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/a9a6ec1298f9bc134b2c5db27d25bb10603b7113","name":"https://git.kernel.org/stable/c/a9a6ec1298f9bc134b2c5db27d25bb10603b7113","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/e1e342d9a561c016b8531ec1f4dcefaad9d64954","name":"https://git.kernel.org/stable/c/e1e342d9a561c016b8531ec1f4dcefaad9d64954","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/05704335803b69c1bfa8637b7ada942bf2ee8a41","name":"https://git.kernel.org/stable/c/05704335803b69c1bfa8637b7ada942bf2ee8a41","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/6ec53ccab0d691b3c73e03d930343ca45987e88d","name":"https://git.kernel.org/stable/c/6ec53ccab0d691b3c73e03d930343ca45987e88d","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-92494","name":"CVE Program record","refsource":"CVE.ORG","tags":["canonical"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-92494","name":"NVD vulnerability detail","refsource":"NVD","tags":["canonical","analysis"]}],"affected":[{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 02f310fcf47fa9311d6ba2946a8d19e7d7d11f37 a9a6ec1298f9bc134b2c5db27d25bb10603b7113 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 02f310fcf47fa9311d6ba2946a8d19e7d7d11f37 35fc83c65faf7949f5701bb34b20f822560a7718 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 02f310fcf47fa9311d6ba2946a8d19e7d7d11f37 74637f7fef030e5fb2e835b7dfeb05efdc48e0fe git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 02f310fcf47fa9311d6ba2946a8d19e7d7d11f37 6ec53ccab0d691b3c73e03d930343ca45987e88d git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 02f310fcf47fa9311d6ba2946a8d19e7d7d11f37 1399f102d8a1855c1a38506057306ec79d0787d9 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 02f310fcf47fa9311d6ba2946a8d19e7d7d11f37 e1e342d9a561c016b8531ec1f4dcefaad9d64954 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 02f310fcf47fa9311d6ba2946a8d19e7d7d11f37 05704335803b69c1bfa8637b7ada942bf2ee8a41 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 5.15.221 5.15.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.1.188 6.1.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.6.157 6.6.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.12.110 6.12.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.18.52 6.18.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 7.2.6 7.2.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 7.3-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/ext4/orphan.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"lessThan":"a9a6ec1298f9bc134b2c5db27d25bb10603b7113","status":"affected","version":"02f310fcf47fa9311d6ba2946a8d19e7d7d11f37","versionType":"git"},{"lessThan":"35fc83c65faf7949f5701bb34b20f822560a7718","status":"affected","version":"02f310fcf47fa9311d6ba2946a8d19e7d7d11f37","versionType":"git"},{"lessThan":"74637f7fef030e5fb2e835b7dfeb05efdc48e0fe","status":"affected","version":"02f310fcf47fa9311d6ba2946a8d19e7d7d11f37","versionType":"git"},{"lessThan":"6ec53ccab0d691b3c73e03d930343ca45987e88d","status":"affected","version":"02f310fcf47fa9311d6ba2946a8d19e7d7d11f37","versionType":"git"},{"lessThan":"1399f102d8a1855c1a38506057306ec79d0787d9","status":"affected","version":"02f310fcf47fa9311d6ba2946a8d19e7d7d11f37","versionType":"git"},{"lessThan":"e1e342d9a561c016b8531ec1f4dcefaad9d64954","status":"affected","version":"02f310fcf47fa9311d6ba2946a8d19e7d7d11f37","versionType":"git"},{"lessThan":"05704335803b69c1bfa8637b7ada942bf2ee8a41","status":"affected","version":"02f310fcf47fa9311d6ba2946a8d19e7d7d11f37","versionType":"git"}]},{"defaultStatus":"affected","product":"Linux","programFiles":["fs/ext4/orphan.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":"5.15.*","status":"unaffected","version":"5.15.221","versionType":"semver"},{"lessThanOrEqual":"6.1.*","status":"unaffected","version":"6.1.188","versionType":"semver"},{"lessThanOrEqual":"6.6.*","status":"unaffected","version":"6.6.157","versionType":"semver"},{"lessThanOrEqual":"6.12.*","status":"unaffected","version":"6.12.110","versionType":"semver"},{"lessThanOrEqual":"6.18.*","status":"unaffected","version":"6.18.52","versionType":"semver"},{"lessThanOrEqual":"7.2.*","status":"unaffected","version":"7.2.6","versionType":"semver"},{"lessThanOrEqual":"*","status":"unaffected","version":"7.3-rc1","versionType":"original_commit_for_fix"}]}],"cpeApplicability":[{"nodes":[{"cpeMatch":[{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"5.15.221","versionStartIncluding":"5.15","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.1.188","versionStartIncluding":"5.15","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.6.157","versionStartIncluding":"5.15","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.12.110","versionStartIncluding":"5.15","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.18.52","versionStartIncluding":"5.15","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"7.2.6","versionStartIncluding":"5.15","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"7.3-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\next4: fix buffer_head leak in ext4_init_orphan_info\n\next4_init_orphan_info() reads orphan file blocks with ext4_bread()\nand stores the returned buffer_head in oi->of_binfo[i].ob_bh.\n\nIf ext4_bread() succeeds but the orphan block magic or checksum\nvalidation fails, the function jumps to out_free. However, the old\nout_free loop starts releasing buffers from i - 1, so the current\nbuffer_head at index i is skipped.\n\nThis leaks the buffer_head reference obtained by ext4_bread() on the\nbad magic and bad checksum error paths.\n\nFix this by tracking the number of successfully read buffer_heads and\nreleasing exactly those buffer_heads on the error path."}],"providerMetadata":{"dateUpdated":"2026-09-17T16:10:10.073Z","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux"},"references":[{"url":"https://git.kernel.org/stable/c/a9a6ec1298f9bc134b2c5db27d25bb10603b7113"},{"url":"https://git.kernel.org/stable/c/35fc83c65faf7949f5701bb34b20f822560a7718"},{"url":"https://git.kernel.org/stable/c/74637f7fef030e5fb2e835b7dfeb05efdc48e0fe"},{"url":"https://git.kernel.org/stable/c/6ec53ccab0d691b3c73e03d930343ca45987e88d"},{"url":"https://git.kernel.org/stable/c/1399f102d8a1855c1a38506057306ec79d0787d9"},{"url":"https://git.kernel.org/stable/c/e1e342d9a561c016b8531ec1f4dcefaad9d64954"},{"url":"https://git.kernel.org/stable/c/05704335803b69c1bfa8637b7ada942bf2ee8a41"}],"title":"ext4: fix buffer_head leak in ext4_init_orphan_info","x_generator":{"engine":"bippy-1.2.0"}}},"cveMetadata":{"assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","assignerShortName":"Linux","cveId":"CVE-2026-92494","datePublished":"2026-09-17T16:10:10.073Z","dateReserved":"2026-09-16T12:21:13.871Z","dateUpdated":"2026-09-17T16:10:10.073Z","state":"PUBLISHED"},"dataType":"CVE_RECORD","dataVersion":"5.2"},"nvd":{"publishedDate":"2026-09-17 17:17:51","lastModifiedDate":"2026-09-17 17:17:51","problem_types":[],"metrics":[],"configurations":[]},"legacy_mitre":{"record":{"CveYear":"2026","CveId":"92494","Ordinal":"1","Title":"ext4: fix buffer_head leak in ext4_init_orphan_info","CVE":"CVE-2026-92494","Year":"2026"},"notes":[{"CveYear":"2026","CveId":"92494","Ordinal":"1","NoteData":"In the Linux kernel, the following vulnerability has been resolved:\n\next4: fix buffer_head leak in ext4_init_orphan_info\n\next4_init_orphan_info() reads orphan file blocks with ext4_bread()\nand stores the returned buffer_head in oi->of_binfo[i].ob_bh.\n\nIf ext4_bread() succeeds but the orphan block magic or checksum\nvalidation fails, the function jumps to out_free. However, the old\nout_free loop starts releasing buffers from i - 1, so the current\nbuffer_head at index i is skipped.\n\nThis leaks the buffer_head reference obtained by ext4_bread() on the\nbad magic and bad checksum error paths.\n\nFix this by tracking the number of successfully read buffer_heads and\nreleasing exactly those buffer_heads on the error path.","Type":"Description","Title":"ext4: fix buffer_head leak in ext4_init_orphan_info"}]}}}