VULNERABILITY INTELLIGENCE
CVE-2026-63383
EPSS probability0.49%
CISA KEVNot currently listed
Published2026-08-20
Last modified2026-10-26
Description
Libevent is an event notification library. Prior to 2.1.13 and 2.2.2-alpha, libevent can read beyond a contiguous evbuffer region in event_tagging.c when decode_tag_internal requests at most five bytes from evbuffer_pullup but iterates using the full logical buffer length. A fragmented evbuffer containing a six-byte malformed tag can therefore advance past the pullup window and trigger an out-of-bounds read, which can crash a process that decodes attacker-controlled tagged RPC data. This issue is fixed in versions 2.1.13 and 2.2.2-alpha.
Weakness classification
- security-advisories@github.com: CWE-125