Answer in brief
CVE-2026-23364 records a High severity (CVSS 7.4) vulnerability in ksmbd: Compare MACs in 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.
CVSS is 7.4. 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 | >=e2f34481b24db2fd634b5edb0a5bd0e4d38cc6e9 <8a665d733940592e671ec6afadcd0be80a091a80 || >=e2f34481b24db2fd634b5edb0a5bd0e4d38cc6e9 <cd52a0e309659537048a864211abc3ea4c5caa63 || >=e2f34481b24db2fd634b5edb0a5bd0e4d38cc6e9 <307afccb751f542246bd5dc68a2c1ffe1a78418c || >=e2f34481b24db2fd634b5edb0a5bd0e4d38cc6e9 <2cdc56ed67615ba0921383a688f24415ebe065f3 || >=e2f34481b24db2fd634b5edb0a5bd0e4d38cc6e9 <93c0a22fec914ec4b697e464895a0f594e29fb28 || >=e2f34481b24db2fd634b5edb0a5bd0e4d38cc6e9 <f4588b85efd6007d46b80aa1b9fb746628ffb3dc || >=e2f34481b24db2fd634b5edb0a5bd0e4d38cc6e9 <c5794709bc9105935dbedef8b9cf9c06f2b559fa | 8a665d733940592e671ec6afadcd0be80a091a80, cd52a0e309659537048a864211abc3ea4c5caa63, 307afccb751f542246bd5dc68a2c1ffe1a78418c, 2cdc56ed67615ba0921383a688f24415ebe065f3, 93c0a22fec914ec4b697e464895a0f594e29fb28, f4588b85efd6007d46b80aa1b9fb746628ffb3dc, c5794709bc9105935dbedef8b9cf9c06f2b559fa |
| Linux/Linuxgeneric | 5.15 | Not reported |
Published upstream
Mar 25, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Jun 19, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Jun 19, 2026
In the Linux kernel, the following vulnerability has been resolved: ksmbd: Compare MACs in constant time To prevent timing attacks, MAC comparisons need to be constant-time. Replace the memcmp() with the correct function, crypto_memneq().
Quoted source text, attributed separately from HOL analysis.
Answer in brief
CVE-2026-23364 records a High severity (CVSS 7.4) vulnerability in ksmbd: Compare MACs in 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.
CVSS is 7.4. 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 | >=e2f34481b24db2fd634b5edb0a5bd0e4d38cc6e9 <8a665d733940592e671ec6afadcd0be80a091a80 || >=e2f34481b24db2fd634b5edb0a5bd0e4d38cc6e9 <cd52a0e309659537048a864211abc3ea4c5caa63 || >=e2f34481b24db2fd634b5edb0a5bd0e4d38cc6e9 <307afccb751f542246bd5dc68a2c1ffe1a78418c || >=e2f34481b24db2fd634b5edb0a5bd0e4d38cc6e9 <2cdc56ed67615ba0921383a688f24415ebe065f3 || >=e2f34481b24db2fd634b5edb0a5bd0e4d38cc6e9 <93c0a22fec914ec4b697e464895a0f594e29fb28 || >=e2f34481b24db2fd634b5edb0a5bd0e4d38cc6e9 <f4588b85efd6007d46b80aa1b9fb746628ffb3dc || >=e2f34481b24db2fd634b5edb0a5bd0e4d38cc6e9 <c5794709bc9105935dbedef8b9cf9c06f2b559fa | 8a665d733940592e671ec6afadcd0be80a091a80, cd52a0e309659537048a864211abc3ea4c5caa63, 307afccb751f542246bd5dc68a2c1ffe1a78418c, 2cdc56ed67615ba0921383a688f24415ebe065f3, 93c0a22fec914ec4b697e464895a0f594e29fb28, f4588b85efd6007d46b80aa1b9fb746628ffb3dc, c5794709bc9105935dbedef8b9cf9c06f2b559fa |
| Linux/Linuxgeneric | 5.15 | Not reported |
Published upstream
Mar 25, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Jun 19, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Jun 19, 2026
In the Linux kernel, the following vulnerability has been resolved: ksmbd: Compare MACs in constant time To prevent timing attacks, MAC comparisons need to be constant-time. Replace the memcmp() with the correct function, crypto_memneq().
Quoted source text, attributed separately from HOL analysis.