ksmbd: prevent out-of-bounds reads in share config responses
Summary
| CVE | CVE-2026-89792 |
|---|---|
| State | PUBLISHED |
| Assigner | Linux |
| Source Priority | CVE Program / NVD first with legacy fallback |
| Published | 2026-09-16 09:17:10 UTC |
| Updated | 2026-10-19 09:18:22 UTC |
| Description | In the Linux kernel, the following vulnerability has been resolved: ksmbd: prevent out-of-bounds reads in share config responses Validate IPC share configuration payload sizes before consuming variable-length fields. Bound veto list parsing and account for the separator byte when deriving the path length. |
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:H/I:N/A:H
EPSS: 0.001670000 probability, percentile 0.053440000 (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:H/I:N/A:H |
| 3.1 | CNA | DECLARED | 7.1 | HIGH | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H |
CVSS v3.1 Breakdown
Attack Vector
LocalAttack Complexity
LowPrivileges Required
LowUser Interaction
NoneScope
UnchangedConfidentiality
HighIntegrity
NoneAvailability
HighCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H
Vendor Declared Affected Products
| Source | Vendor | Product | Version | Platforms |
|---|---|---|---|---|
| CNA | Linux | Linux | affected 88b7f1143b15b29cccb8392b4f38e75b7bb3e300 df8aa4a09733c4d3974b1db32c1782b3aad3a151 git | Not specified |
| CNA | Linux | Linux | affected 51a6c2af9d20203ddeeaf73314ba8854b38d01bd 0127f1c119bde40578f4d25f5d17333b4e75de8c git | Not specified |
| CNA | Linux | Linux | affected a637fabac554270a851033f5ab402ecb90bc479c fd636a87161def6e35876ab7943641ce457974c8 git | Not specified |
| CNA | Linux | Linux | affected a677ebd8ca2f2632ccdecbad7b87641274e15aac ffa507f5f774cb4d45136b106989ebc051361263 git | Not specified |
| CNA | Linux | Linux | affected a677ebd8ca2f2632ccdecbad7b87641274e15aac cd2bcee450bc94770be56c0b896c1a1dc6838bd8 git | Not specified |
| CNA | Linux | Linux | affected a677ebd8ca2f2632ccdecbad7b87641274e15aac 61a8d06600c8c397f9a7e01940479d4c94a82f5f git | Not specified |
| CNA | Linux | Linux | affected a677ebd8ca2f2632ccdecbad7b87641274e15aac f25e93768fcc5d8287e50b1ec52a42e4c276df34 git | Not specified |
| CNA | Linux | Linux | affected 76af689a45aa44714b46d1a7de4ffdf851ded896 git | Not specified |
| CNA | Linux | Linux | affected 5.15.157 5.15.222 semver | Not specified |
| CNA | Linux | Linux | affected 6.1.85 6.1.189 semver | Not specified |
| CNA | Linux | Linux | affected 6.6.26 6.6.158 semver | Not specified |
| CNA | Linux | Linux | affected 6.8.5 6.9 semver | Not specified |
| CNA | Linux | Linux | affected 6.9 | Not specified |
| CNA | Linux | Linux | unaffected 6.9 semver | Not specified |
| CNA | Linux | Linux | unaffected 5.15.222 5.15.* semver | Not specified |
| CNA | Linux | Linux | unaffected 6.1.189 6.1.* semver | Not specified |
| CNA | Linux | Linux | unaffected 6.6.158 6.6.* semver | Not specified |
| CNA | Linux | Linux | unaffected 6.12.111 6.12.* semver | Not specified |
| CNA | Linux | Linux | unaffected 6.18.53 6.18.* semver | Not specified |
| CNA | Linux | Linux | unaffected 7.2.6 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/0127f1c119bde40578f4d25f5d17333b4e75de8c | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | |
| git.kernel.org/stable/c/61a8d06600c8c397f9a7e01940479d4c94a82f5f | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | |
| git.kernel.org/stable/c/f25e93768fcc5d8287e50b1ec52a42e4c276df34 | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | |
| git.kernel.org/stable/c/df8aa4a09733c4d3974b1db32c1782b3aad3a151 | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | |
| git.kernel.org/stable/c/ffa507f5f774cb4d45136b106989ebc051361263 | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | |
| git.kernel.org/stable/c/cd2bcee450bc94770be56c0b896c1a1dc6838bd8 | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | |
| git.kernel.org/stable/c/fd636a87161def6e35876ab7943641ce457974c8 | 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.