CVE-2026-80807

Name of the Vulnerable Software and Affected Versions Linux kernel (affected versions not specified)

Description An issue exists in the nilfs2 file system where the GC ioctl fails to perform range checks on parameters that determine the page index. An attacker can provide artificially crafted parameters in the nilfs vdesc structure, leading to the insertion of a page or folio with a page index of ULONG MAX into the page cache. This causes index wrap-around in the filemap get folios tag() function, which is called by nilfs lookup dirty data buffers(), resulting in duplicate processing of dirty buffers and list corruption due to a double list add tail() call on bh->b assoc buffers.

Recommendations At the moment, there is no information about a newer version that contains a fix for this vulnerability.