cifs: parse_dfs_referrals: prevent oob on malformed input
Summary
| CVE | CVE-2025-40099 |
|---|---|
| State | PUBLISHED |
| Assigner | Linux |
| Source Priority | CVE Program / NVD first with legacy fallback |
| Published | 2025-10-30 10:15:34 UTC |
| Updated | 2026-07-30 06:24:11 UTC |
| Description | In the Linux kernel, the following vulnerability has been resolved: cifs: parse_dfs_referrals: prevent oob on malformed input Malicious SMB server can send invalid reply to FSCTL_DFS_GET_REFERRALS - reply smaller than sizeof(struct get_dfs_referral_rsp) - reply with number of referrals smaller than NumberOfReferrals in the header Processing of such replies will cause oob. Return -EINVAL error on such replies to prevent oob-s. |
Risk And Classification
Primary CVSS: v3.1 9.4 CRITICAL from 416baaa9-dc9f-4396-8d5f-8c081fb06d67
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:L/A:H
EPSS: 0.003820000 probability, percentile 0.309380000 (date 2026-07-31)
| Version | Source | Type | Score | Severity | Vector |
|---|---|---|---|---|---|
| 3.1 | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | Secondary | 9.4 | CRITICAL | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:L/A:H |
| 3.1 | CNA | DECLARED | 9.4 | CRITICAL | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:L/A:H |
CVSS v3.1 Breakdown
Attack Vector
NetworkAttack Complexity
LowPrivileges Required
NoneUser Interaction
NoneScope
UnchangedConfidentiality
HighIntegrity
LowAvailability
HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:L/A:H
Vendor Declared Affected Products
| Source | Vendor | Product | Version | Platforms |
|---|---|---|---|---|
| CNA | Linux | Linux | affected 4ecce920e13ace16a5ba45efe8909946c28fb2ad cfacc7441f760e4a73cc71b6ff1635261d534657 git | Not specified |
| CNA | Linux | Linux | affected 4ecce920e13ace16a5ba45efe8909946c28fb2ad 15c73964da9df994302f579ed14ee5fdbce7a332 git | Not specified |
| CNA | Linux | Linux | affected 4ecce920e13ace16a5ba45efe8909946c28fb2ad 8bc4a8d39bac23d8b044fd3e2dbfd965f1d9b058 git | Not specified |
| CNA | Linux | Linux | affected 4ecce920e13ace16a5ba45efe8909946c28fb2ad bb0f2e66e1ac043a5b238f5bcab4f26f3c317039 git | Not specified |
| CNA | Linux | Linux | affected 4ecce920e13ace16a5ba45efe8909946c28fb2ad 6447b0e355562a1ff748c4a2ffb89aae7e84d2c9 git | Not specified |
| CNA | Linux | Linux | affected 4.11 | Not specified |
| CNA | Linux | Linux | unaffected 4.11 semver | Not specified |
| CNA | Linux | Linux | unaffected 6.1.158 6.1.* semver | Not specified |
| CNA | Linux | Linux | unaffected 6.6.114 6.6.* semver | Not specified |
| CNA | Linux | Linux | unaffected 6.12.55 6.12.* semver | Not specified |
| CNA | Linux | Linux | unaffected 6.17.5 6.17.* semver | Not specified |
| CNA | Linux | Linux | unaffected 6.18 * original_commit_for_fix | Not specified |
References
| Reference | Source | Link | Tags |
|---|---|---|---|
| git.kernel.org/stable/c/15c73964da9df994302f579ed14ee5fdbce7a332 | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | |
| git.kernel.org/stable/c/8bc4a8d39bac23d8b044fd3e2dbfd965f1d9b058 | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | |
| git.kernel.org/stable/c/6447b0e355562a1ff748c4a2ffb89aae7e84d2c9 | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | |
| git.kernel.org/stable/c/bb0f2e66e1ac043a5b238f5bcab4f26f3c317039 | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | |
| git.kernel.org/stable/c/cfacc7441f760e4a73cc71b6ff1635261d534657 | 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.