Answer in brief
CVE-2025-40204 records a Unknown severity vulnerability in sctp: Fix MAC comparison to be constant-time. 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.
Answer in brief
CVE-2025-40204 records a Unknown severity vulnerability in sctp: Fix MAC comparison to be constant-time. 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 | >=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <b93fa8dc521d00d2d44bf034fb90e0d79b036617 || >=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <0e8b8c326c2a6de4d837b1bb034ea704f4690d77 || >=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <1cd60e0d0fb8f0e62ec4499138afce6342dc9d4c || >=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <9c05d44ec24126fc283835b68f82dba3ae985209 || >=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <ed3044b9c810c5c24eb2830053fbfe5fd134c5d4 || >=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <8019b3699289fce3f10b63f98601db97b8d105b0 || >=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <0b32ff285ff6f6f1ac1d9495787ccce8837d6405 || >=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <dd91c79e4f58fbe2898dac84858033700e0e99fb | b93fa8dc521d00d2d44bf034fb90e0d79b036617, 0e8b8c326c2a6de4d837b1bb034ea704f4690d77, 1cd60e0d0fb8f0e62ec4499138afce6342dc9d4c, 9c05d44ec24126fc283835b68f82dba3ae985209, ed3044b9c810c5c24eb2830053fbfe5fd134c5d4, 8019b3699289fce3f10b63f98601db97b8d105b0, 0b32ff285ff6f6f1ac1d9495787ccce8837d6405, dd91c79e4f58fbe2898dac84858033700e0e99fb |
| Linux/Linuxgeneric | 2.6.12 | Not reported |
Published upstream
Nov 12, 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: sctp: Fix MAC comparison to be constant-time To prevent timing attacks, MACs need to be compared in constant time. Use the appropriate helper function for this.
Quoted source text, attributed separately from HOL analysis.
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 | >=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <b93fa8dc521d00d2d44bf034fb90e0d79b036617 || >=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <0e8b8c326c2a6de4d837b1bb034ea704f4690d77 || >=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <1cd60e0d0fb8f0e62ec4499138afce6342dc9d4c || >=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <9c05d44ec24126fc283835b68f82dba3ae985209 || >=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <ed3044b9c810c5c24eb2830053fbfe5fd134c5d4 || >=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <8019b3699289fce3f10b63f98601db97b8d105b0 || >=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <0b32ff285ff6f6f1ac1d9495787ccce8837d6405 || >=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <dd91c79e4f58fbe2898dac84858033700e0e99fb | b93fa8dc521d00d2d44bf034fb90e0d79b036617, 0e8b8c326c2a6de4d837b1bb034ea704f4690d77, 1cd60e0d0fb8f0e62ec4499138afce6342dc9d4c, 9c05d44ec24126fc283835b68f82dba3ae985209, ed3044b9c810c5c24eb2830053fbfe5fd134c5d4, 8019b3699289fce3f10b63f98601db97b8d105b0, 0b32ff285ff6f6f1ac1d9495787ccce8837d6405, dd91c79e4f58fbe2898dac84858033700e0e99fb |
| Linux/Linuxgeneric | 2.6.12 | Not reported |
Published upstream
Nov 12, 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: sctp: Fix MAC comparison to be constant-time To prevent timing attacks, MACs need to be compared in constant time. Use the appropriate helper function for this.
Quoted source text, attributed separately from HOL analysis.