Answer in brief
CVE-2026-74564 records a Unknown severity vulnerability in netfilter: xt_hashlimit: validate hashtable supports XT_HASHLIMIT_RATE_MATCH. 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 | >=bea74641e3786d51dcf1175527cc1781420961c9 <24683fea1f06bd3bd2707b99460e859bc6464c22 || >=bea74641e3786d51dcf1175527cc1781420961c9 <32ec8d4aba2cf22e12bdc28df8c4bd833c195fc0 || >=bea74641e3786d51dcf1175527cc1781420961c9 <d186f77d18bdfb252d401ff992ca3001a6a65a0f || >=bea74641e3786d51dcf1175527cc1781420961c9 <06a76334243ccd875a981aa8bb46c0f931ef1e3b || >=bea74641e3786d51dcf1175527cc1781420961c9 <305b63e1402267459fdabb183af4527f6799eebf | 24683fea1f06bd3bd2707b99460e859bc6464c22, 32ec8d4aba2cf22e12bdc28df8c4bd833c195fc0, d186f77d18bdfb252d401ff992ca3001a6a65a0f, 06a76334243ccd875a981aa8bb46c0f931ef1e3b, 305b63e1402267459fdabb183af4527f6799eebf |
| Linux/Linuxgeneric | 4.14 | Not reported |
Published upstream
Aug 15, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Aug 15, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Aug 15, 2026
In the Linux kernel, the following vulnerability has been resolved: netfilter: xt_hashlimit: validate hashtable supports XT_HASHLIMIT_RATE_MATCH The XT_HASHLIMIT_RATE_MATCH flag mode changes the semantics of the dsthash_ent structure which represents an entry in the hashtable. There is a union area which uses a different layout to express the rate match mode. Update .checkentry path to validate the XT_HASHLIMIT_RATE_MATCH mode flag is requested by two or more different rules that refer to the same hashtable. Otherwise, uninitialized access to the burst field in the union is possible. Reject the use of the XT_HASHLIMIT_RATE_MATCH mode flag if set on by revision less than 3 too.
Quoted source text, attributed separately from HOL analysis.
Answer in brief
CVE-2026-74564 records a Unknown severity vulnerability in netfilter: xt_hashlimit: validate hashtable supports XT_HASHLIMIT_RATE_MATCH. 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 | >=bea74641e3786d51dcf1175527cc1781420961c9 <24683fea1f06bd3bd2707b99460e859bc6464c22 || >=bea74641e3786d51dcf1175527cc1781420961c9 <32ec8d4aba2cf22e12bdc28df8c4bd833c195fc0 || >=bea74641e3786d51dcf1175527cc1781420961c9 <d186f77d18bdfb252d401ff992ca3001a6a65a0f || >=bea74641e3786d51dcf1175527cc1781420961c9 <06a76334243ccd875a981aa8bb46c0f931ef1e3b || >=bea74641e3786d51dcf1175527cc1781420961c9 <305b63e1402267459fdabb183af4527f6799eebf | 24683fea1f06bd3bd2707b99460e859bc6464c22, 32ec8d4aba2cf22e12bdc28df8c4bd833c195fc0, d186f77d18bdfb252d401ff992ca3001a6a65a0f, 06a76334243ccd875a981aa8bb46c0f931ef1e3b, 305b63e1402267459fdabb183af4527f6799eebf |
| Linux/Linuxgeneric | 4.14 | Not reported |
Published upstream
Aug 15, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Aug 15, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Aug 15, 2026
In the Linux kernel, the following vulnerability has been resolved: netfilter: xt_hashlimit: validate hashtable supports XT_HASHLIMIT_RATE_MATCH The XT_HASHLIMIT_RATE_MATCH flag mode changes the semantics of the dsthash_ent structure which represents an entry in the hashtable. There is a union area which uses a different layout to express the rate match mode. Update .checkentry path to validate the XT_HASHLIMIT_RATE_MATCH mode flag is requested by two or more different rules that refer to the same hashtable. Otherwise, uninitialized access to the burst field in the union is possible. Reject the use of the XT_HASHLIMIT_RATE_MATCH mode flag if set on by revision less than 3 too.
Quoted source text, attributed separately from HOL analysis.