CVE-2026-41499
- Source
- https://cve.org/CVERecord?id=CVE-2026-41499
- Import Source
- https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-41499.json
- JSON Data
- https://api.osv.dev/v1/vulns/CVE-2026-41499
- Aliases
-
- GHSA-qvqj-p8mm-r7h3
- Published
- 2026-04-29T18:01:25Z
- Modified
- 2026-10-21T02:57:16Z
- Severity
-
- 6.5 (Medium) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H CVSS Calculator
- Summary
- Wazuh: Multiple Heap-based NULL WRITE Buffer Underflows in parse_uname_string()
- Details
-
Wazuh is a free and open source platform used for threat prevention, detection, and response. From version 4.0.0 to before version 4.14.4, multiple heap-based out-of-bounds WRITE vulnerabilities exist in parse_uname_string() (remoted_op.c). This function processes OS identification data from agents and contains a dangerous code pattern that appears in 4 locations within the same function: writing to strlen(ptr) - 1 without checking for empty strings. When the string is empty, strlen() returns 0, and 0 - 1 wraps to SIZE_MAX due to unsigned integer underflow. Due to pointer arithmetic wrapping, SIZE_MAX effectively becomes -1, causing a write exactly 1 byte before the allocated buffer. This corrupts heap metadata (e.g., the chunk size field in glibc malloc), leading to heap corruption. This issue has been patched in version 4.14.4.
- Database specific
{ "cna_assigner": "GitHub_M", "cwe_ids": [ "CWE-124", "CWE-191" ], "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/41xxx/CVE-2026-41499.json" }- References
Affected packages
Git / github.com/wazuh/wazuh
Affected ranges
- Type
- GIT
- Repo
- https://github.com/wazuh/wazuh
- Events
- Database specific
-
Show details
{ "extracted_events": [ { "range": [ { "introduced": "4.0.0" }, { "fixed": "4.14.4" } ], "source": "AFFECTED_FIELD", "strategy": "StringRangeExpression" }, { "original_tag": "v4.14.4", "range": [ { "fixed": "5933ec9ebee76fb2546e5f7fc9f3a27d0aeca605" } ], "source": "REFERENCES_TAG" }, { "cpe": "cpe:2.3:a:wazuh:wazuh:*:*:*:*:*:*:*:*", "range": [ { "introduced": "4.0.0" }, { "fixed": "4.14.4" } ], "source": "CPE_RANGE" } ] }