{"id":"CVE-2024-49881","revision":null,"records":[{"revision":"065fb9891d1c455486a06b3ac5ea8611","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2024-49881","aliases":[],"title":"ext4: update orig_path in ext4_find_extent()","description":"In the Linux kernel, the following vulnerability has been resolved:\n\next4: update orig_path in ext4_find_extent()\n\nIn ext4_find_extent(), if the path is not big enough, we free it and set\n*orig_path to NULL. But after reallocating and successfully initializing\nthe path, we don't update *orig_path, in which case the caller gets a\nvalid path but a NULL ppath, and this may cause a NULL pointer dereference\nor a path memory leak. For example:\n\next4_split_extent\n path = *ppath = 2000\n ext4_find_extent\n if (depth > path[0].p_maxdepth)\n kfree(path = 2000);\n *orig_path = path = NULL;\n path = kcalloc() = 3000\n ext4_split_extent_at(*ppath = NULL)\n path = *ppath;\n ex = path[depth].p_ext;\n // NULL pointer dereference!\n\n==================================================================\nBUG: kernel NULL pointer dereference, address: 0000000000000010\nCPU: 6 UID: 0 PID: 576 Comm: fsstress Not tainted 6.11.0-rc2-dirty #847\nRIP: 0010:ext4_split_extent_at+0x6d/0x560\nCall Trace:\n \n ext4_split_extent.isra.0+0xcb/0x1b0\n ext4_ext_convert_to_initialized+0x168/0x6c0\n ext4_ext_handle_unwritten_extents+0x325/0x4d0\n ext4_ext_map_blocks+0x520/0xdb0\n ext4_map_blocks+0x2b0/0x690\n ext4_iomap_begin+0x20e/0x2c0\n[...]\n==================================================================\n\nTherefore, *orig_path is updated when the extent lookup succeeds, so that\nthe caller can safely use path or *ppath.","state":0,"publishedAt":"2024-10-21T18:01:19.478+00:00","modifiedAt":"2026-10-15T00:53:27.992+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/extents.c\",\n \"fs/ext4/move_extent.c\"\n ],\n \"versions\": [\n {\n \"version\": \"10809df84a4d868db61af621bae3658494165279\",\n \"lessThan\": \"ec0c0beb9b777cdd1edd7df9b36e0f3e67e2bdff\",\n \"status\": \"affected\",\n \"versionType\": \"git\"\n },\n {\n \"version\": \"10809df84a4d868db61af621bae3658494165279\",\n \"lessThan\": \"6766937d0327000ac1b87c97bbecdd28b0dd6599\",\n \"status\": \"affected\",\n \"versionType\": \"git\"\n },\n {\n \"version\": \"10809df84a4d868db61af621bae3658494165279\",\n \"lessThan\": \"a9fcb1717d75061d3653ed69365c8d45331815cd\",\n \"status\": \"affected\",\n \"versionType\": \"git\"\n },\n {\n \"version\": \"10809df84a4d868db61af621bae3658494165279\",\n \"lessThan\": \"6801ed1298204d16a38571091e31178bfdc3c679\",\n \"status\": \"affected\",\n \"versionType\": \"git\"\n },\n {\n \"version\": \"10809df84a4d868db61af621bae3658494165279\",\n \"lessThan\": \"f55ecc58d07a6c1f6d6d5b5af125c25f8da0bda2\",\n \"status\": \"affected\",\n \"versionType\": \"git\"\n },\n {\n \"version\": \"10809df84a4d868db61af621bae3658494165279\",\n \"lessThan\": \"b63481b3a388ee2df9e295f97273226140422a42\",\n \"status\": \"affected\",\n \"versionType\": \"git\"\n },\n {\n \"version\": \"10809df84a4d868db61af621bae3658494165279\",\n \"lessThan\": \"11b230100d6801c014fab2afabc8bdea304c1b96\",\n \"status\": \"affected\",\n \"versionType\": \"git\"\n },\n {\n \"version\": \"10809df84a4d868db61af621bae3658494165279\",\n \"lessThan\": \"5b4b2dcace35f618fe361a87bae6f0d13af31bc1\",\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/extents.c\",\n \"fs/ext4/move_extent.c\"\n ],\n \"versions\": [\n {\n \"version\": \"3.18\",\n \"status\": \"affected\"\n },\n {\n \"version\": \"0\",\n \"lessThan\": \"3.18\",\n \"status\": \"unaffected\",\n \"versionType\": \"semver\"\n },\n {\n \"version\": \"4.19.323\",\n \"lessThanOrEqual\": \"4.19.*\",\n \"status\": \"unaffected\",\n \"versionType\": \"semver\"\n },\n {\n \"version\": \"5.10.227\",\n \"lessThanOrEqual\": \"5.10.*\",\n \"status\": \"unaffected\",\n \"versionType\": \"semver\"\n },\n {\n \"version\": \"5.15.168\",\n \"lessThanOrEqual\": \"5.15.*\",\n \"status\": \"unaffected\",\n \"versionType\": \"semver\"\n },\n {\n \"version\": \"6.1.113\",\n \"lessThanOrEqual\": \"6.1.*\",\n \"status\": \"unaffected\",\n \"versionType\": \"semver\"\n },\n {\n \"version\": \"6.6.55\",\n \"lessThanOrEqual\": \"6.6.*\",\n \"status\": \"unaffected\",\n \"versionType\": \"semver\"\n },\n {\n \"version\": \"6.10.14\",\n \"lessThanOrEqual\": \"6.10.*\",\n \"status\": \"unaffected\",\n \"versionType\": \"semver\"\n },\n {\n \"version\": \"6.11.3\",\n \"lessThanOrEqual\": \"6.11.*\",\n \"status\": \"unaffected\",\n \"versionType\": \"semver\"\n },\n {\n \"version\": \"6.12\",\n \"lessThanOrEqual\": \"*\",\n \"status\": \"unaffected\",\n \"versionType\": \"original_commit_for_fix\"\n }\n ]\n }"}],"metrics":[],"references":["https://git.kernel.org/stable/c/ec0c0beb9b777cdd1edd7df9b36e0f3e67e2bdff","https://git.kernel.org/stable/c/6766937d0327000ac1b87c97bbecdd28b0dd6599","https://git.kernel.org/stable/c/a9fcb1717d75061d3653ed69365c8d45331815cd","https://git.kernel.org/stable/c/6801ed1298204d16a38571091e31178bfdc3c679","https://git.kernel.org/stable/c/f55ecc58d07a6c1f6d6d5b5af125c25f8da0bda2","https://git.kernel.org/stable/c/b63481b3a388ee2df9e295f97273226140422a42","https://git.kernel.org/stable/c/11b230100d6801c014fab2afabc8bdea304c1b96","https://git.kernel.org/stable/c/5b4b2dcace35f618fe361a87bae6f0d13af31bc1"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2024-49881","license":"CVE Program Terms of Use","key":"cve-program:CVE-2024-49881","identifiers":["CVE-2024-49881"]},"retained":false,"historicalAffected":[]}],"coverage":[{"source":"cisa-kev:global","scope":"Complete CISA KEV catalog; all vendors. Missing entries do not establish absence of exploitation.","generation":"2026-11-09T20:04:25.0077254+00:00","complete":true,"records":1772,"lastAttemptAt":"2026-11-09T20:04:25.0077254+00:00","lastSuccessAt":"2026-11-09T20:04:25.1926568+00:00","error":null,"lastVerifiedAt":"2026-11-09T20:04:25.192657+00:00","snapshotPublishedAt":null,"importing":false,"stagedRecords":0,"checkedIdentifiers":null,"expectedIdentifiers":null,"failedIdentifiers":null},{"source":"cve-program","scope":"Official CVE Program baseline and cumulative hourly delta; all vendors, published and rejected records","generation":"cve-24e6fde7b744113daefb8f6135035fb8a5c69c9617c9c0d40574a0376532ffd3-4a9560b8b58726018512a0a26f2f2de094eec0a9257ebc797e76aa7229628f6d","complete":true,"records":421528,"lastAttemptAt":"2026-11-09T20:02:23.7922996+00:00","lastSuccessAt":"2026-11-09T20:02:23.6346925+00:00","error":null,"lastVerifiedAt":"2026-11-09T20:02:23.7922996+00:00","snapshotPublishedAt":"2026-11-09T19:26:49+00:00","importing":false,"stagedRecords":0,"checkedIdentifiers":null,"expectedIdentifiers":null,"failedIdentifiers":null},{"source":"euvd","scope":"Rolling EUVD lookups of CVE aliases in current public OSV archives; 500 identifiers per refresh, rechecked after 48 hours. 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No reader inventory is sent.","generation":"enrichment-9938fd6291bf40d68f5b1fd395158ad4","complete":true,"records":13667,"lastAttemptAt":"2026-11-09T20:04:38.0577664+00:00","lastSuccessAt":"2026-11-09T20:04:38.055+00:00","error":null,"lastVerifiedAt":"2026-11-09T20:04:38.055+00:00","snapshotPublishedAt":null,"importing":false,"stagedRecords":0,"checkedIdentifiers":13707,"expectedIdentifiers":13707,"failedIdentifiers":0},{"source":"osv:Go","scope":"Complete OSV Go ecosystem archive, including withdrawn and malicious-package source records; statement counts are not unique CVE counts","generation":"go-980593e6977a6d1b4fb1eed5a1ffe88a468736f89f0a06f710924ad59132c023","complete":true,"records":9914,"lastAttemptAt":"2026-11-09T20:04:24.9600639+00:00","lastSuccessAt":"2026-11-08T11:07:07.068788+00:00","error":null,"lastVerifiedAt":"2026-11-09T20:04:24.9600639+00:00","snapshotPublishedAt":"2026-11-08T11:02:46+00:00","importing":false,"stagedRecords":0,"checkedIdentifiers":null,"expectedIdentifiers":null,"failedIdentifiers":null},{"source":"osv:NuGet","scope":"Complete OSV NuGet ecosystem archive, including GitHub Advisory Database records; NuGet version matching only","generation":"nuget-712163772d637a9cfaa34d4241efb9e9d0ccd6149596c672c613d362f44af841","complete":true,"records":1971,"lastAttemptAt":"2026-11-09T20:02:23.9593912+00:00","lastSuccessAt":"2026-11-09T18:02:23.0088273+00:00","error":null,"lastVerifiedAt":"2026-11-09T20:02:23.9593912+00:00","snapshotPublishedAt":"2026-11-09T17:03:01+00:00","importing":false,"stagedRecords":0,"checkedIdentifiers":null,"expectedIdentifiers":null,"failedIdentifiers":null},{"source":"osv:crates.io","scope":"Complete OSV crates.io ecosystem archive, including withdrawn and malicious-package source records; statement counts are not unique CVE counts","generation":"crates.io-761ecc9061239b0da572dc9254c6f384c1d19339eb08408c436647a2f26129e9","complete":true,"records":3064,"lastAttemptAt":"2026-11-09T20:04:24.9750181+00:00","lastSuccessAt":"2026-11-09T17:05:03.4044794+00:00","error":null,"lastVerifiedAt":"2026-11-09T20:04:24.9750181+00:00","snapshotPublishedAt":"2026-11-09T16:33:20+00:00","importing":false,"stagedRecords":0,"checkedIdentifiers":null,"expectedIdentifiers":null,"failedIdentifiers":null},{"source":"osv:npm","scope":"Complete OSV npm ecosystem archive, including withdrawn and malicious-package source records; statement counts are not unique CVE counts","generation":"npm-604a3d0f2ac3a85e07b87120f064f717efb18ea8fa81b2bec8e0f33ba949fa25","complete":true,"records":231321,"lastAttemptAt":"2026-11-09T20:04:24.8172812+00:00","lastSuccessAt":"2026-11-09T20:04:23.3062045+00:00","error":null,"lastVerifiedAt":"2026-11-09T20:04:24.8172812+00:00","snapshotPublishedAt":"2026-11-09T19:33:14+00:00","importing":false,"stagedRecords":0,"checkedIdentifiers":null,"expectedIdentifiers":null,"failedIdentifiers":null}]}