{"cve":"CVE-2024-49957","nvd":{"published":"2024-10-21T18:15:16.950","modified":"2026-06-17T08:00:49.240","status":"Modified","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nocfs2: fix null-ptr-deref when journal load failed.\n\nDuring the mounting process, if journal_reset() fails because of too short\njournal, then lead to jbd2_journal_load() fails with NULL j_sb_buffer. \nSubsequently, ocfs2_journal_shutdown() calls\njbd2_journal_flush()->jbd2_cleanup_journal_tail()->\n__jbd2_update_log_tail()->jbd2_journal_update_sb_log_tail()\n->lock_buffer(journal->j_sb_buffer), resulting in a null-pointer\ndereference error.\n\nTo resolve this issue, we should check the JBD2_LOADED flag to ensure the\njournal was properly loaded.  Additionally, use journal instead of\nosb->journal directly to simplify the code.","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","score":5.5},"cwes":["CWE-476"],"references":["https://git.kernel.org/stable/c/387bf565cc03e2e8c720b8b4798efea4aacb6962","https://git.kernel.org/stable/c/5784d9fcfd43bd853654bb80c87ef293b9e8e80a","https://git.kernel.org/stable/c/703b2c7e0798d263154dc8593dc2345f75dc077f","https://git.kernel.org/stable/c/82dfdd1e31e774578f76ce6dc90c834f96403a0f","https://git.kernel.org/stable/c/86a89e75e9e4dfa768b97db466ad6bedf2e7ea5b"],"products":["linux:linux_kernel"],"source":"nvd","synced_at":"2026-10-19T21:56:33.105311382+00:00"},"epss":{"cve":"CVE-2024-49957","score":0.0025,"percentile":0.16385,"date":"2026-10-31"},"kev":null,"osv":[],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}