{"id":"CVE-2026-92494","revision":"c5bb813fac234bc5a2a12be48dc05bb0","records":[{"revision":"c5bb813fac234bc5a2a12be48dc05bb0","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2026-92494","aliases":[],"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":0,"publishedAt":"2026-09-17T16:10:10.073+00:00","modifiedAt":"2026-10-19T09:04:00.5+00:00","affected":[{"ecosystem":"Vendor product","name":"Linux","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"product\": \"Linux\",\n                    \"vendor\": \"Linux\",\n                    \"defaultStatus\": \"unaffected\",\n                    \"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\n                    \"programFiles\": [\n                        \"fs/ext4/orphan.c\"\n                    ],\n                    \"versions\": [\n                        {\n                            \"version\": \"02f310fcf47fa9311d6ba2946a8d19e7d7d11f37\",\n                            \"lessThan\": \"a9a6ec1298f9bc134b2c5db27d25bb10603b7113\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"02f310fcf47fa9311d6ba2946a8d19e7d7d11f37\",\n                            \"lessThan\": \"35fc83c65faf7949f5701bb34b20f822560a7718\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"02f310fcf47fa9311d6ba2946a8d19e7d7d11f37\",\n                            \"lessThan\": \"74637f7fef030e5fb2e835b7dfeb05efdc48e0fe\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"02f310fcf47fa9311d6ba2946a8d19e7d7d11f37\",\n                            \"lessThan\": \"6ec53ccab0d691b3c73e03d930343ca45987e88d\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"02f310fcf47fa9311d6ba2946a8d19e7d7d11f37\",\n                            \"lessThan\": \"1399f102d8a1855c1a38506057306ec79d0787d9\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"02f310fcf47fa9311d6ba2946a8d19e7d7d11f37\",\n                            \"lessThan\": \"e1e342d9a561c016b8531ec1f4dcefaad9d64954\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"02f310fcf47fa9311d6ba2946a8d19e7d7d11f37\",\n                            \"lessThan\": \"05704335803b69c1bfa8637b7ada942bf2ee8a41\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        }\n                    ]\n                }"},{"ecosystem":"Vendor product","name":"Linux","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"product\": \"Linux\",\n                    \"vendor\": \"Linux\",\n                    \"defaultStatus\": \"affected\",\n                    \"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\n                    \"programFiles\": [\n                        \"fs/ext4/orphan.c\"\n                    ],\n                    \"versions\": [\n                        {\n                            \"version\": \"5.15\",\n                            \"status\": \"affected\"\n                        },\n                        {\n                            \"version\": \"0\",\n                            \"lessThan\": \"5.15\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"5.15.221\",\n                            \"lessThanOrEqual\": \"5.15.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.1.188\",\n                            \"lessThanOrEqual\": \"6.1.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.6.157\",\n                            \"lessThanOrEqual\": \"6.6.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.12.110\",\n                            \"lessThanOrEqual\": \"6.12.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.18.52\",\n                            \"lessThanOrEqual\": \"6.18.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"7.2.6\",\n                            \"lessThanOrEqual\": \"7.2.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"7.3\",\n                            \"lessThanOrEqual\": \"*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"original_commit_for_fix\"\n                        }\n                    ]\n                }"}],"metrics":[],"references":["https://git.kernel.org/stable/c/a9a6ec1298f9bc134b2c5db27d25bb10603b7113","https://git.kernel.org/stable/c/35fc83c65faf7949f5701bb34b20f822560a7718","https://git.kernel.org/stable/c/74637f7fef030e5fb2e835b7dfeb05efdc48e0fe","https://git.kernel.org/stable/c/6ec53ccab0d691b3c73e03d930343ca45987e88d","https://git.kernel.org/stable/c/1399f102d8a1855c1a38506057306ec79d0787d9","https://git.kernel.org/stable/c/e1e342d9a561c016b8531ec1f4dcefaad9d64954","https://git.kernel.org/stable/c/05704335803b69c1bfa8637b7ada942bf2ee8a41"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-92494","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-92494","identifiers":["CVE-2026-92494"]},"retained":false,"historicalAffected":[]}],"coverage":[]}