Vulnerability details
CVE-2026-89840
Linux Linux
f2fs: validate MOVE_RANGE destination size
CVSS 3.1
7.1High
Official 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 scores
| Score | Version | Source | Vector |
|---|---|---|---|
| 7.1High | 3.1 | CVEProject cvelistV5 (CNA) (Linux) | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:H |
Affected products
| Vendor | Product | Versions | Source |
|---|---|---|---|
| Linux | Linux | 4.8 | CVEProject cvelistV5 (CNA) |
| Linux | Linux | 4dd6f977fc778e5a0da604e5f8cb2f36d163d27b ≤ v < 54c587f3f95ce2d6932a16566db83f73cc4313e1 | CVEProject cvelistV5 (CNA) |
| Linux | Linux | 4dd6f977fc778e5a0da604e5f8cb2f36d163d27b ≤ v < bca61ee5192ea47003722486ae9588a2a4bb47b6 | CVEProject cvelistV5 (CNA) |
| Linux | Linux | 4dd6f977fc778e5a0da604e5f8cb2f36d163d27b ≤ v < 454de20a5a36c000b75f49337aae8c92045c5242 | CVEProject cvelistV5 (CNA) |
| Linux | Linux | 4dd6f977fc778e5a0da604e5f8cb2f36d163d27b ≤ v < dcae1eeda53149f219dd6af93b3083b7271c1c63 | CVEProject cvelistV5 (CNA) |
| Linux | Linux | 4dd6f977fc778e5a0da604e5f8cb2f36d163d27b ≤ v < e533889fc26aea0cd83c90327063f272061dd820 | CVEProject cvelistV5 (CNA) |
| Linux | Linux | 4dd6f977fc778e5a0da604e5f8cb2f36d163d27b ≤ v < db13064669526494cd78ba3a4394063b740e940c | CVEProject cvelistV5 (CNA) |
References and advisories
6- https://git.kernel.org/stable/c/454de20a5a36c000b75f49337aae8c92045c5242
- 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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Details
- Published
- 2026-09-16
- Last updated
- 2026-10-30
- State
- Published
- Assigner (CNA)
- Linux
Exploit prediction (EPSS)
0.16%
Probability of exploitation in 30 days
5.7%
Percentile (among all CVEs)
Weaknesses (CWE)
- —