Vulnerability 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.
CVSS Score
HIGH
References
- https://git.kernel.org/stable/c/dcae1eeda53149f219dd6af93b3083b7271c1c63
- https://git.kernel.org/stable/c/e533889fc26aea0cd83c90327063f272061dd820
FAQ
What is CVE-2026-89840?
CVE-2026-89840 is a vulnerability with a CVSS score of 7.1 (HIGH). 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 updatin...
How severe is CVE-2026-89840?
CVE-2026-89840 has been rated HIGH with a CVSS base score of 7.1/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-89840?
Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.