CVE - CVE-2024-49957

CVE-ID
CVE-2024-49957	Learn more at National Vulnerability Database (NVD) • CVSS Severity Rating • Fix Information • Vulnerable Software Versions • SCAP Mappings • CPE Information
Description
In the Linux kernel, the following vulnerability has been resolved: ocfs2: fix null-ptr-deref when journal load failed. During the mounting process, if journal_reset() fails because of too short journal, then lead to jbd2_journal_load() fails with NULL j_sb_buffer. Subsequently, ocfs2_journal_shutdown() calls jbd2_journal_flush()->jbd2_cleanup_journal_tail()-> __jbd2_update_log_tail()->jbd2_journal_update_sb_log_tail() ->lock_buffer(journal->j_sb_buffer), resulting in a null-pointer dereference error. To resolve this issue, we should check the JBD2_LOADED flag to ensure the journal was properly loaded. Additionally, use journal instead of osb->journal directly to simplify the code.
References
Note: References are provided for the convenience of the reader to help distinguish between vulnerabilities. The list is not intended to be complete.
MISC:https://git.kernel.org/stable/c/387bf565cc03e2e8c720b8b4798efea4aacb6962 URL:https://git.kernel.org/stable/c/387bf565cc03e2e8c720b8b4798efea4aacb6962 MISC:https://git.kernel.org/stable/c/5784d9fcfd43bd853654bb80c87ef293b9e8e80a URL:https://git.kernel.org/stable/c/5784d9fcfd43bd853654bb80c87ef293b9e8e80a MISC:https://git.kernel.org/stable/c/82dfdd1e31e774578f76ce6dc90c834f96403a0f URL:https://git.kernel.org/stable/c/82dfdd1e31e774578f76ce6dc90c834f96403a0f MISC:https://git.kernel.org/stable/c/86a89e75e9e4dfa768b97db466ad6bedf2e7ea5b URL:https://git.kernel.org/stable/c/86a89e75e9e4dfa768b97db466ad6bedf2e7ea5b MISC:https://git.kernel.org/stable/c/bf605ae98dab5c15c5b631d4d7f88898cb41b649 URL:https://git.kernel.org/stable/c/bf605ae98dab5c15c5b631d4d7f88898cb41b649 MISC:https://git.kernel.org/stable/c/f60e94a83db799bde625ac8671a5b4a6354e7120 URL:https://git.kernel.org/stable/c/f60e94a83db799bde625ac8671a5b4a6354e7120 MISC:https://git.kernel.org/stable/c/ff55291fb36779819211b596da703389135f5b05 URL:https://git.kernel.org/stable/c/ff55291fb36779819211b596da703389135f5b05
Assigning CNA
kernel.org
Date Record Created
20241021	Disclaimer: The record creation date may reflect when the CVE ID was allocated or reserved, and does not necessarily indicate when this vulnerability was discovered, shared with the affected vendor, publicly disclosed, or updated in CVE.
Phase (Legacy)
Assigned (20241021)
Votes (Legacy)

Comments (Legacy)

Proposed (Legacy)
N/A
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