f2fs: validate MOVE_RANGE destination size
Summary
| CVE | CVE-2026-89840 |
|---|---|
| State | PUBLISHED |
| Assigner | Linux |
| Source Priority | CVE Program / NVD first with legacy fallback |
| Published | 2026-09-16 11:16:50 UTC |
| Updated | 2026-10-21 13:20:31 UTC |
| 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. |
Risk And Classification
Primary CVSS: v3.1 7.1 HIGH from 416baaa9-dc9f-4396-8d5f-8c081fb06d67
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:H
EPSS: 0.001710000 probability, percentile 0.058200000 (date 2026-10-05)
| Version | Source | Type | Score | Severity | Vector |
|---|---|---|---|---|---|
| 3.1 | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | Secondary | 7.1 | HIGH | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:H |
| 3.1 | CNA | DECLARED | 7.1 | HIGH | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:H |
CVSS v3.1 Breakdown
Attack Vector
LocalAttack Complexity
LowPrivileges Required
LowUser Interaction
NoneScope
UnchangedConfidentiality
NoneIntegrity
HighAvailability
HighCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:H
Vendor Declared Affected Products
| Source | Vendor | Product | Version | Platforms |
|---|---|---|---|---|
| CNA | Linux | Linux | affected 4dd6f977fc778e5a0da604e5f8cb2f36d163d27b 54c587f3f95ce2d6932a16566db83f73cc4313e1 git | Not specified |
| CNA | Linux | Linux | affected 4dd6f977fc778e5a0da604e5f8cb2f36d163d27b bca61ee5192ea47003722486ae9588a2a4bb47b6 git | Not specified |
| CNA | Linux | Linux | affected 4dd6f977fc778e5a0da604e5f8cb2f36d163d27b db13064669526494cd78ba3a4394063b740e940c git | Not specified |
| CNA | Linux | Linux | affected 4dd6f977fc778e5a0da604e5f8cb2f36d163d27b dcae1eeda53149f219dd6af93b3083b7271c1c63 git | Not specified |
| CNA | Linux | Linux | affected 4dd6f977fc778e5a0da604e5f8cb2f36d163d27b e533889fc26aea0cd83c90327063f272061dd820 git | Not specified |
| CNA | Linux | Linux | affected 4.8 | Not specified |
| CNA | Linux | Linux | unaffected 4.8 semver | Not specified |
| CNA | Linux | Linux | unaffected 6.6.160 6.6.* semver | Not specified |
| CNA | Linux | Linux | unaffected 6.12.112 6.12.* semver | Not specified |
| CNA | Linux | Linux | unaffected 6.18.53 6.18.* semver | Not specified |
| CNA | Linux | Linux | unaffected 7.2.5 7.2.* semver | Not specified |
| CNA | Linux | Linux | unaffected 7.3 * original_commit_for_fix | Not specified |
References
| Reference | Source | Link | Tags |
|---|---|---|---|
| git.kernel.org/stable/c/54c587f3f95ce2d6932a16566db83f73cc4313e1 | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | |
| git.kernel.org/stable/c/bca61ee5192ea47003722486ae9588a2a4bb47b6 | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | |
| git.kernel.org/stable/c/db13064669526494cd78ba3a4394063b740e940c | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | |
| git.kernel.org/stable/c/dcae1eeda53149f219dd6af93b3083b7271c1c63 | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | |
| git.kernel.org/stable/c/e533889fc26aea0cd83c90327063f272061dd820 | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | |
| CVE Program record | CVE.ORG | www.cve.org | canonical |
| NVD vulnerability detail | NVD | nvd.nist.gov | canonical, analysis |
No vendor comments have been submitted for this CVE.
There are currently no legacy QID mappings associated with this CVE.