CVE-2026-89840
f2fs: validate MOVE_RANGE destination size
CVSS Score
0.0
EPSS Score
0.0%
EPSS Percentile
0th
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.
| Vendor | linux |
| Product | linux |
| Ecosystems | |
| Industries | Technology |
| Published | Sep 16, 2026 |
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Affected Versions
Linux / Linux
4dd6f977fc778e5a0da604e5f8cb2f36d163d27b < dcae1eeda53149f219dd6af93b3083b7271c1c63 4dd6f977fc778e5a0da604e5f8cb2f36d163d27b < e533889fc26aea0cd83c90327063f272061dd820
Linux / Linux
4.8