Bug 2365245 (CVE-2025-37839) - CVE-2025-37839 kernel: jbd2: remove wrong sb->s_sequence check
Summary: CVE-2025-37839 kernel: jbd2: remove wrong sb->s_sequence check
Keywords:
Status: NEW
Alias: CVE-2025-37839
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
medium
medium
Target Milestone: ---
Assignee: Product Security DevOps Team
QA Contact:
URL:
Whiteboard:
Depends On:
Blocks:
TreeView+ depends on / blocked
 
Reported: 2025-05-09 07:01 UTC by OSIDB Bzimport
Modified: 2025-05-09 09:17 UTC (History)
4 users (show)

Fixed In Version:
Clone Of:
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Description OSIDB Bzimport 2025-05-09 07:01:25 UTC 
In the Linux kernel, the following vulnerability has been resolved:

jbd2: remove wrong sb->s_sequence check

Journal emptiness is not determined by sb->s_sequence == 0 but rather by
sb->s_start == 0 (which is set a few lines above). Furthermore 0 is a
valid transaction ID so the check can spuriously trigger. Remove the
invalid WARN_ON.
Comment 1 Michal Findra 2025-05-09 09:08:04 UTC 
Upstream advisory:
https://lore.kernel.org/linux-cve-announce/2025050915-CVE-2025-37839-2807@gregkh/T
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