Bug 2320274 (CVE-2024-47700) - CVE-2024-47700 kernel: ext4: check stripe size compatibility on remount as well
Summary: CVE-2024-47700 kernel: ext4: check stripe size compatibility on remount as well
Keywords:
Status: NEW
Alias: CVE-2024-47700
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: 2320339
Blocks:
TreeView+ depends on / blocked
 
Reported: 2024-10-21 13:07 UTC by OSIDB Bzimport
Modified: 2025-05-13 08:29 UTC (History)
4 users (show)

Fixed In Version:
Clone Of:
Environment:
Last Closed:
Embargoed:

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System ID Private Priority Status Summary Last Updated
Red Hat Product Errata RHSA-2025:6966 0 None None None 2025-05-13 08:29:35 UTC

Description OSIDB Bzimport 2024-10-21 13:07:27 UTC 
In the Linux kernel, the following vulnerability has been resolved:

ext4: check stripe size compatibility on remount as well

We disable stripe size in __ext4_fill_super if it is not a multiple of
the cluster ratio however this check is missed when trying to remount.
This can leave us with cases where stripe < cluster_ratio after
remount:set making EXT4_B2C(sbi->s_stripe) become 0 that can cause some
unforeseen bugs like divide by 0.

Fix that by adding the check in remount path as well.
Comment 1 Robb Gatica 2024-10-21 15:01:02 UTC 
Upstream advisory:
https://lore.kernel.org/linux-cve-announce/2024102114-CVE-2024-47700-00ff@gregkh/T
Comment 2 errata-xmlrpc 2025-05-13 08:29:33 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 9

Via RHSA-2025:6966 https://access.redhat.com/errata/RHSA-2025:6966
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