CVE-2026-63383

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.

CVSS

No CVSS.

References

Link	Resource
https://github.com/libevent/libevent/commit/91ed8745eebabdd27592a83d350338a8c4626321
https://github.com/libevent/libevent/commit/e1f9e21887c6b104e206a718385ba3ffc75180cb
https://github.com/libevent/libevent/releases/tag/release-2.1.13-stable
https://github.com/libevent/libevent/releases/tag/release-2.2.2-alpha
https://github.com/libevent/libevent/security/advisories/GHSA-fj29-64w6-73h6
https://github.com/libevent/libevent/security/advisories/GHSA-fj29-64w6-73h6

Configurations

No configuration.

History

No history.

Information

Published : 2026-08-20 18:16

Updated : 2026-09-09 21:19

NVD link : CVE-2026-63383

Mitre link : CVE-2026-63383

CVE.ORG link : CVE-2026-63383

JSON object : View

Products Affected

No product.

CWE

CWE-125

Out-of-bounds Read

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