PT-2026-76581 · Libevent+2 · Libevent+2
CVE-2026-63383
·
Published
2026-07-01
·
Updated
2026-09-01
CVSS v4.0
8.7
High
| Vector | AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X |
Name of the Vulnerable Software and Affected Versions
Libevent versions prior to 2.1.13
Libevent versions prior to 2.2.2-alpha
Description
An out-of-bounds read can occur in the
event tagging.c file when the decode tag internal() function requests a maximum of five bytes from evbuffer pullup but continues to iterate using the full logical buffer length. This allows a fragmented evbuffer containing a six-byte malformed tag to advance beyond the pullup window, potentially crashing processes that decode attacker-controlled tagged RPC data.Recommendations
Update to version 2.1.13.
Update to version 2.2.2-alpha.
Exploit
Fix
Out of bounds Read
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Weakness Enumeration
Related Identifiers
Affected Products
Libevent
Linuxmint
Ubuntu