CVE-2026-89840

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.

CVSS 3.1

7.1CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:H

EPSS

0.2% chance of exploitation in the next 30 days; higher than 5% of CVEs (scores of 2026-10-25)

Published

2026-09-16

Modified

2026-10-21

Record from

the NVD, synced 2026-10-22

References

• https://git.kernel.org/stable/c/54c587f3f95ce2d6932a16566db83f73cc4313e1
• https://git.kernel.org/stable/c/bca61ee5192ea47003722486ae9588a2a4bb47b6
• https://git.kernel.org/stable/c/db13064669526494cd78ba3a4394063b740e940c
• https://git.kernel.org/stable/c/dcae1eeda53149f219dd6af93b3083b7271c1c63
• https://git.kernel.org/stable/c/e533889fc26aea0cd83c90327063f272061dd820

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