{"id":"CVE-2026-92494","title":"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_bi…","summary":"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_bi…","severity":"medium","vendor":"Linux","product":"Linux","affected":["Linux >= 02f310fcf47fa9311d6ba2946a8d19e7d7d11f37 < a9a6ec1298f9bc134b2c5db27d25bb10603b7113","Linux >= 02f310fcf47fa9311d6ba2946a8d19e7d7d11f37 < 35fc83c65faf7949f5701bb34b20f822560a7718","Linux >= 02f310fcf47fa9311d6ba2946a8d19e7d7d11f37 < 74637f7fef030e5fb2e835b7dfeb05efdc48e0fe","Linux >= 02f310fcf47fa9311d6ba2946a8d19e7d7d11f37 < 6ec53ccab0d691b3c73e03d930343ca45987e88d","Linux >= 02f310fcf47fa9311d6ba2946a8d19e7d7d11f37 < 1399f102d8a1855c1a38506057306ec79d0787d9","Linux >= 02f310fcf47fa9311d6ba2946a8d19e7d7d11f37 < e1e342d9a561c016b8531ec1f4dcefaad9d64954","Linux >= 02f310fcf47fa9311d6ba2946a8d19e7d7d11f37 < 05704335803b69c1bfa8637b7ada942bf2ee8a41","Linux 5.15"],"published":"2026-09-17","updated":"2026-09-17","sourceUpdated":"2026-09-17T17:17:51.547","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-92494","references":[{"url":"https://git.kernel.org/stable/c/05704335803b69c1bfa8637b7ada942bf2ee8a41","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/1399f102d8a1855c1a38506057306ec79d0787d9","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/35fc83c65faf7949f5701bb34b20f822560a7718","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/6ec53ccab0d691b3c73e03d930343ca45987e88d","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/74637f7fef030e5fb2e835b7dfeb05efdc48e0fe","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/a9a6ec1298f9bc134b2c5db27d25bb10603b7113","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/e1e342d9a561c016b8531ec1f4dcefaad9d64954","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-92494.json"},{"url":"https://access.redhat.com/security/cve/CVE-2026-92494"},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2536620"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-92494"},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-92494"},{"url":"https://git.kernel.org/pub/scm/linux/security/vulns.git/plain/cve/published/2026/CVE-2026-92494.mbox"}],"tags":["nvd","cve.org","csaf","vex","red-hat"],"ingestedAt":"2026-09-17T16:21:47.784Z","epss":0.00205,"epssPercentile":0.10905,"cvss":5.5,"cvssVector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","cvssSource":"vendor","cwe":["CWE-772"],"slug":"CVE-2026-92494","body":"## Overview\n\nIn 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.\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.\n\n## Vendor advisories\n\n- **Red Hat VEX** · Low · affected: Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 9, Red Hat OpenShift Container Platform 4 · no fix planned: Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 9, Red Hat OpenShift Container Platform 4 · updated 2026-09-23 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-92494.json)","depth":"sunlit","depthScore":30,"depthScoreParts":{"impact":30.3,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[{"seq":210009,"id":"CVE-2026-92494","ts":1790235653632,"field":"cvss","old":null,"new":"5.5"},{"seq":210008,"id":"CVE-2026-92494","ts":1790235653632,"field":"severity","old":"none","new":"medium"}]}