5.5

CVE-2024-49957

ocfs2: fix null-ptr-deref when journal load failed.

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.
Daten sind bereitgestellt durch National Vulnerability Database (NVD)
Linux ≫ Linux Kernel Version >= 2.6.32 < 5.10.227
Linux ≫ Linux Kernel Version >= 5.11 < 5.15.168
Linux ≫ Linux Kernel Version >= 5.16 < 6.1.113
Linux ≫ Linux Kernel Version >= 6.2 < 6.6.55
Linux ≫ Linux Kernel Version >= 6.7 < 6.10.14
Linux ≫ Linux Kernel Version >= 6.11 < 6.11.3
VulnDex Vulnerability Enrichment
Diese Information steht angemeldeten Benutzern zur Verfügung. Login Login
Zu dieser CVE wurde keine Warnung gefunden.
EPSS Metriken
Typ Quelle Score Percentile
EPSS FIRST.org 0.25% 0.159
CVSS Metriken
Quelle Base Score Exploit Score Impact Score Vector String
nvd@nist.gov 5.5 1.8 3.6
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
CWE-476 NULL Pointer Dereference

The product dereferences a pointer that it expects to be valid but is NULL.

https://git.kernel.org/stable/c/387bf565cc03e2e8c720b8b4798efea4aacb6962
Patch
https://git.kernel.org/stable/c/5784d9fcfd43bd853654bb80c87ef293b9e8e80a
Patch
https://git.kernel.org/stable/c/703b2c7e0798d263154dc8593dc2345f75dc077f
https://git.kernel.org/stable/c/82dfdd1e31e774578f76ce6dc90c834f96403a0f
Patch
https://git.kernel.org/stable/c/86a89e75e9e4dfa768b97db466ad6bedf2e7ea5b
Patch
https://git.kernel.org/stable/c/bf605ae98dab5c15c5b631d4d7f88898cb41b649
Patch
https://git.kernel.org/stable/c/f60e94a83db799bde625ac8671a5b4a6354e7120
Patch
https://git.kernel.org/stable/c/fd89d92c1140cee8f59de336cb37fa65e359c123
https://git.kernel.org/stable/c/ff55291fb36779819211b596da703389135f5b05
Patch
https://lists.debian.org/debian-lts-announce/2025/03/msg00002.html
https://lists.debian.org/debian-lts-announce/2025/01/msg00001.html