Answer in brief
CVE-2026-75029 records a Medium severity (CVSS 5.3) vulnerability in Message parser retains every identical singleton RDATA, enabling wire-to-work amplification. The current sources do not mark it as known exploited. The current feed maps ISC/BIND 9 (generic), ISC/BIND 9 (generic). Check affected ranges and fixed versions before updating.
Analysis pending evidence review
HOL Guard separates source facts from reviewed analysis. See the methodology.
CVSS is 5.3. 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 ISC/BIND 9 (generic), ISC/BIND 9 (generic). Check affected ranges and fixed versions before updating.
| Package | Affected range | Fixed version |
|---|---|---|
| ISC/BIND 9generic | 9.11.0 || 9.20.0 || 9.21.0 || 9.11.3-S1 || 9.20.9-S1 | Not reported |
| ISC/BIND 9generic | >=9.11.0 <=9.18.50 || >=9.20.0 <=9.20.27 || >=9.21.0 <=9.21.25 || >=9.11.3-S1 <=9.18.50-S1 || >=9.20.9-S1 <=9.20.27-S1 | Not reported |
Published upstream
Sep 16, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Oct 26, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Sep 16, 2026
In a query response, an attacker may send `named` multiple copies of a record that should only exist once (such as an SOA record). If the RDATA is the same on all the copies, the record is appended to the in-memory RDATA set, which can cause increased memory usage of the negative cache and possibly lead to other memory attack vectors. This issue affects BIND 9 versions 9.11.0 through 9.18.50, 9.20.0 through 9.20.27, 9.21.0 through 9.21.25, 9.11.3-S1 through 9.18.50-S1, and 9.20.9-S1 through 9.20.27-S1.
Quoted source text, attributed separately from HOL analysis.