Description
In the Linux kernel, the following vulnerability has been resolved: f2fs: validate MOVE_RANGE destination size F2FS_IOC_MOVE_RANGE checks the source range, but not the destination end before updating i_size. A source hole can expose this: __clone_blkaddrs() skips NULL_ADDR entries and returns success, so the caller can still extend the destination inode with unchecked pos_out + len. Reject destination overflow and use inode_newsize_ok() before extending the destination inode.
References6
- git.kernel.org/stable/c/454de20a5a36c000b75f49337aae8c92045c5242
- git.kernel.org/stable/c/54c587f3f95ce2d6932a16566db83f73cc4313e1
- git.kernel.org/stable/c/bca61ee5192ea47003722486ae9588a2a4bb47b6
- git.kernel.org/stable/c/db13064669526494cd78ba3a4394063b740e940c
- git.kernel.org/stable/c/dcae1eeda53149f219dd6af93b3083b7271c1c63
- git.kernel.org/stable/c/e533889fc26aea0cd83c90327063f272061dd820
Metrics
- CVSS 3.1
-
7.1
HIGH
Score source: CNA
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:H - EPSS — exploit probability
- 0% percentile: 6 · as of 8 November 2026
Could this be exploited in your environment?
A patch closes the known hole. A penetration test shows what an attacker can still reach — with proof.