Bug 2426079 (CVE-2023-54305)

Summary: CVE-2023-54305 kernel: ext4: refuse to create ea block when umounted
Product: [Other] Security Response Reporter: OSIDB Bzimport <bzimport>
Component: vulnerabilityAssignee: Product Security DevOps Team <prodsec-dev>
Status: NEW --- QA Contact:
Severity: low Docs Contact:
Priority: low    
Version: unspecifiedKeywords: Security
Target Milestone: ---   
Target Release: ---   
Hardware: All   
OS: Linux   
Whiteboard:
Fixed In Version: Doc Type: ---
Doc Text:
Story Points: ---
Clone Of: Environment:
Last Closed: Type: ---
Regression: --- Mount Type: ---
Documentation: --- CRM:
Verified Versions: Category: ---
oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: --- Target Upstream Version:
Embargoed:

Description OSIDB Bzimport 2025-12-30 13:07:16 UTC 
In the Linux kernel, the following vulnerability has been resolved:

ext4: refuse to create ea block when umounted

The ea block expansion need to access s_root while it is
already set as NULL when umount is triggered. Refuse this
request to avoid panic.
Comment 1 Alexander B 2025-12-31 10:46:42 UTC 
Upstream advisory:
https://lore.kernel.org/linux-cve-announce/2025123034-CVE-2023-54305-68b4@gregkh/T