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OpenAdvisories
High · 7.5 CVE-2025-63656 EUVD-2025-206524GHSA-9fp6-hxcv-2446

An out-of-bounds read in the header_cmp function (mk_server/mk_http_parser.c) of monkey commit f37e984 allows attackers to cause a Denial o…

Published Jan 29, 2026 · Updated Feb 3, 2026 · Assigned by mitre

Description

An out-of-bounds read in the header_cmp function (mk_server/mk_http_parser.c) of monkey commit f37e984 allows attackers to cause a Denial of Service (DoS) via sending a crafted HTTP request to the server.

Fixed in Linux distributions

Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.

Azure Linux

ReleasePackageFixed inAdvisory
Azure Linux 3 fluent-bit No fix yet —
Azure Linux 2 (CBL-Mariner) fluent-bit No fix yet —

References