CVE-2026-63817 f2fs: validate compress cache inode only when enabled

In the Linux kernel, the following vulnerability has been resolved: f2fs: validate compress cache inode only when enabled F2FSCOMPRESSINO uses NMIsbi-maxnid as the synthetic inode number for the compressed page cache inode. That inode only exists when the compresscache mount option is enabled. Wh...

CVE-2026-63817 f2fs: validate compress cache inode only when enabled

In the Linux kernel, the following vulnerability has been resolved: f2fs: validate compress cache inode only when enabled F2FSCOMPRESSINO uses NMIsbi-maxnid as the synthetic inode number for the compressed page cache inode. That inode only exists when the compresscache mount option is enabled. Wh...

CVE-2026-63817

The CVE-2026-63817 issue pertains to the Linux kernel file system F2FS: when the compress_cache mount option is enabled, F2FS_COMPRESS_INO() uses NM_I(sbi)->max_nid as the synthetic inode for the compressed page cache inode. If compress_cache is disabled, max_nid lies outside the valid inode r...