Bug 2439842 (CVE-2026-23145)

Summary: CVE-2026-23145 kernel: ext4: fix iloc.bh leak in ext4_xattr_inode_update_ref
Product: [Other] Security Response Reporter: OSIDB Bzimport <bzimport>
Component: vulnerabilityAssignee: Product Security DevOps Team <prodsec-dev>
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Version: unspecifiedKeywords: Security
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OS: Linux   
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A memory leak flaw was found in the Linux kernel's ext4 filesystem. In the ext4_xattr_inode_update_ref() function, the error handling path fails to release the buffer head reference (iloc.bh). This causes a buffer head leak on each error occurrence, which over time can lead to memory exhaustion and system instability.
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Description OSIDB Bzimport 2026-02-14 16:01:16 UTC 
In the Linux kernel, the following vulnerability has been resolved:

ext4: fix iloc.bh leak in ext4_xattr_inode_update_ref

The error branch for ext4_xattr_inode_update_ref forget to release the
refcount for iloc.bh. Find this when review code.
Comment 1 Alexander B 2026-02-16 08:32:28 UTC 
Upstream advisory:
https://lore.kernel.org/linux-cve-announce/2026021417-CVE-2026-23145-0c0b@gregkh/T