Bug 2419941 (CVE-2022-50622)

Summary: CVE-2022-50622 kernel: Linux kernel (ext4): Memory leak due to improper handling of krealloc failure
Product: [Other] Security Response Reporter: OSIDB Bzimport <bzimport>
Component: vulnerabilityAssignee: Product Security DevOps Team <prodsec-dev>
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Priority: low    
Version: unspecifiedKeywords: Security
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OS: Linux   
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A flaw was found in the Linux kernel's ext4 filesystem. This vulnerability occurs due to improper handling of memory allocation failures when the `krealloc` function returns NULL within `ext4_fc_record_modified_inode()`. A local user could potentially exploit this flaw, leading to a memory leak. This memory leak can ultimately result in a Denial of Service (DoS) condition on the affected system.
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Description OSIDB Bzimport 2025-12-08 07:10:41 UTC 
In the Linux kernel, the following vulnerability has been resolved:

ext4: fix potential memory leak in ext4_fc_record_modified_inode()

As krealloc may return NULL, in this case 'state->fc_modified_inodes'
may not be freed by krealloc, but 'state->fc_modified_inodes' already
set NULL. Then will lead to 'state->fc_modified_inodes' memory leak.
Comment 1 Jon Moroney 2025-12-08 17:46:31 UTC 
Upstream advisory:
https://lore.kernel.org/linux-cve-announce/2025120852-CVE-2022-50622-9f34@gregkh/T