Answer in brief
CVE-2025-21789 records a Unknown severity vulnerability in LoongArch: csum: Fix OoB access in IP checksum code for negative lengths. 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 | >=69e3a6aa6be21de6aaf38130fad97ecde34a193c <964a8895704a22efc06a2a3276b624a5ae985a06 || >=69e3a6aa6be21de6aaf38130fad97ecde34a193c <9f15a8df542c0f08732a67d1a14ee7c22948fb97 || >=69e3a6aa6be21de6aaf38130fad97ecde34a193c <d6508ffff32b44b6d0de06704034e4eef1c307a7 || >=69e3a6aa6be21de6aaf38130fad97ecde34a193c <6287f1a8c16138c2ec750953e35039634018c84a | 964a8895704a22efc06a2a3276b624a5ae985a06, 9f15a8df542c0f08732a67d1a14ee7c22948fb97, d6508ffff32b44b6d0de06704034e4eef1c307a7, 6287f1a8c16138c2ec750953e35039634018c84a |
| Linux/Linuxgeneric | 6.4 | Not reported |
Published upstream
Feb 27, 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: LoongArch: csum: Fix OoB access in IP checksum code for negative lengths Commit 69e3a6aa6be2 ("LoongArch: Add checksum optimization for 64-bit system") would cause an undefined shift and an out-of-bounds read. Commit 8bd795fedb84 ("arm64: csum: Fix OoB access in IP checksum code for negative lengths") fixes the same issue on ARM64.
Quoted source text, attributed separately from HOL analysis.
Answer in brief
CVE-2025-21789 records a Unknown severity vulnerability in LoongArch: csum: Fix OoB access in IP checksum code for negative lengths. 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 | >=69e3a6aa6be21de6aaf38130fad97ecde34a193c <964a8895704a22efc06a2a3276b624a5ae985a06 || >=69e3a6aa6be21de6aaf38130fad97ecde34a193c <9f15a8df542c0f08732a67d1a14ee7c22948fb97 || >=69e3a6aa6be21de6aaf38130fad97ecde34a193c <d6508ffff32b44b6d0de06704034e4eef1c307a7 || >=69e3a6aa6be21de6aaf38130fad97ecde34a193c <6287f1a8c16138c2ec750953e35039634018c84a | 964a8895704a22efc06a2a3276b624a5ae985a06, 9f15a8df542c0f08732a67d1a14ee7c22948fb97, d6508ffff32b44b6d0de06704034e4eef1c307a7, 6287f1a8c16138c2ec750953e35039634018c84a |
| Linux/Linuxgeneric | 6.4 | Not reported |
Published upstream
Feb 27, 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: LoongArch: csum: Fix OoB access in IP checksum code for negative lengths Commit 69e3a6aa6be2 ("LoongArch: Add checksum optimization for 64-bit system") would cause an undefined shift and an out-of-bounds read. Commit 8bd795fedb84 ("arm64: csum: Fix OoB access in IP checksum code for negative lengths") fixes the same issue on ARM64.
Quoted source text, attributed separately from HOL analysis.