CVE-2024-49957

Summary

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.

Affected Software

VendorProductVersion RangeStatus
LinuxLinuxf6f50e28f0cb8d7bcdfaacc83129f005dede11b1 < fd89d92c1140cee8f59de336cb37fa65e359c123affected
LinuxLinuxf6f50e28f0cb8d7bcdfaacc83129f005dede11b1 < 703b2c7e0798d263154dc8593dc2345f75dc077faffected
LinuxLinuxf6f50e28f0cb8d7bcdfaacc83129f005dede11b1 < bf605ae98dab5c15c5b631d4d7f88898cb41b649affected
LinuxLinuxf6f50e28f0cb8d7bcdfaacc83129f005dede11b1 < ff55291fb36779819211b596da703389135f5b05affected
LinuxLinuxf6f50e28f0cb8d7bcdfaacc83129f005dede11b1 < 82dfdd1e31e774578f76ce6dc90c834f96403a0faffected
LinuxLinuxf6f50e28f0cb8d7bcdfaacc83129f005dede11b1 < 86a89e75e9e4dfa768b97db466ad6bedf2e7ea5baffected
LinuxLinuxf6f50e28f0cb8d7bcdfaacc83129f005dede11b1 < f60e94a83db799bde625ac8671a5b4a6354e7120affected
LinuxLinuxf6f50e28f0cb8d7bcdfaacc83129f005dede11b1 < 387bf565cc03e2e8c720b8b4798efea4aacb6962affected
LinuxLinuxf6f50e28f0cb8d7bcdfaacc83129f005dede11b1 < 5784d9fcfd43bd853654bb80c87ef293b9e8e80aaffected
LinuxLinux2.6.32affected
LinuxLinux0 < 2.6.32unaffected
LinuxLinux4.19.323 <= 4.19.*unaffected
LinuxLinux5.4.285 <= 5.4.*unaffected
LinuxLinux5.10.227 <= 5.10.*unaffected
LinuxLinux5.15.168 <= 5.15.*unaffected
LinuxLinux6.1.113 <= 6.1.*unaffected
LinuxLinux6.6.55 <= 6.6.*unaffected
LinuxLinux6.10.14 <= 6.10.*unaffected
LinuxLinux6.11.3 <= 6.11.*unaffected
LinuxLinux6.12 <= *unaffected

Weaknesses

ADP Enrichment

CISA ADP Vulnrichment

  • SSVC:
  • Exploitation: none
    • Automatable: no
    • Technical Impact: partial

CVE Program Container

Additional References

References