Bug 2420420 (CVE-2025-40333)

Summary: CVE-2025-40333 kernel: f2fs: fix infinite loop in __insert_extent_tree()
Product: [Other] Security Response Reporter: OSIDB Bzimport <bzimport>
Component: vulnerabilityAssignee: Product Security DevOps Team <prodsec-dev>
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OS: Linux   
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Description OSIDB Bzimport 2025-12-09 05:02:15 UTC 
In the Linux kernel, the following vulnerability has been resolved:

f2fs: fix infinite loop in __insert_extent_tree()

When we get wrong extent info data, and look up extent_node in rb tree,
it will cause infinite loop (CONFIG_F2FS_CHECK_FS=n). Avoiding this by
return NULL and print some kernel messages in that case.
Comment 1 Alexander B 2025-12-09 13:03:13 UTC 
Upstream advisory:
https://lore.kernel.org/linux-cve-announce/2025120910-CVE-2025-40333-4f6a@gregkh/T