Answer in brief
CVE-2025-40099 records a Unknown severity vulnerability in cifs: parse_dfs_referrals: prevent oob on malformed input. The current sources do not mark it as known exploited. The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.
Analysis pending evidence review
HOL Guard separates source facts from reviewed analysis. See the methodology.
A CVSS score is not reported in the current record. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.
Analysis status
Analysis pending evidence review
Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.
The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.
| Package | Affected range | Fixed version |
|---|---|---|
| Linux/Linuxgeneric | >=4ecce920e13ace16a5ba45efe8909946c28fb2ad <cfacc7441f760e4a73cc71b6ff1635261d534657 || >=4ecce920e13ace16a5ba45efe8909946c28fb2ad <15c73964da9df994302f579ed14ee5fdbce7a332 || >=4ecce920e13ace16a5ba45efe8909946c28fb2ad <8bc4a8d39bac23d8b044fd3e2dbfd965f1d9b058 || >=4ecce920e13ace16a5ba45efe8909946c28fb2ad <bb0f2e66e1ac043a5b238f5bcab4f26f3c317039 || >=4ecce920e13ace16a5ba45efe8909946c28fb2ad <6447b0e355562a1ff748c4a2ffb89aae7e84d2c9 | cfacc7441f760e4a73cc71b6ff1635261d534657, 15c73964da9df994302f579ed14ee5fdbce7a332, 8bc4a8d39bac23d8b044fd3e2dbfd965f1d9b058, bb0f2e66e1ac043a5b238f5bcab4f26f3c317039, 6447b0e355562a1ff748c4a2ffb89aae7e84d2c9 |
| Linux/Linuxgeneric | 4.11 | Not reported |
Published upstream
Oct 30, 2025
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Aug 5, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Aug 5, 2026
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.
Quoted source text, attributed separately from HOL analysis.
Answer in brief
CVE-2025-40099 records a Unknown severity vulnerability in cifs: parse_dfs_referrals: prevent oob on malformed input. The current sources do not mark it as known exploited. The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.
Analysis pending evidence review
HOL Guard separates source facts from reviewed analysis. See the methodology.
A CVSS score is not reported in the current record. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.
Analysis status
Analysis pending evidence review
Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.
The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.
| Package | Affected range | Fixed version |
|---|---|---|
| Linux/Linuxgeneric | >=4ecce920e13ace16a5ba45efe8909946c28fb2ad <cfacc7441f760e4a73cc71b6ff1635261d534657 || >=4ecce920e13ace16a5ba45efe8909946c28fb2ad <15c73964da9df994302f579ed14ee5fdbce7a332 || >=4ecce920e13ace16a5ba45efe8909946c28fb2ad <8bc4a8d39bac23d8b044fd3e2dbfd965f1d9b058 || >=4ecce920e13ace16a5ba45efe8909946c28fb2ad <bb0f2e66e1ac043a5b238f5bcab4f26f3c317039 || >=4ecce920e13ace16a5ba45efe8909946c28fb2ad <6447b0e355562a1ff748c4a2ffb89aae7e84d2c9 | cfacc7441f760e4a73cc71b6ff1635261d534657, 15c73964da9df994302f579ed14ee5fdbce7a332, 8bc4a8d39bac23d8b044fd3e2dbfd965f1d9b058, bb0f2e66e1ac043a5b238f5bcab4f26f3c317039, 6447b0e355562a1ff748c4a2ffb89aae7e84d2c9 |
| Linux/Linuxgeneric | 4.11 | Not reported |
Published upstream
Oct 30, 2025
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Aug 5, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Aug 5, 2026
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.
Quoted source text, attributed separately from HOL analysis.