VULNERABILITY INTELLIGENCE

CVE-2026-43618

CVSS score8.1 HIGH
EPSS probability0.78%
CISA KEVNot currently listed
Published2026-05-20
Last modified2026-09-01
CVSS vectorCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H

Description

Rsync version 3.4.2 and prior contain an integer overflow vulnerability in the compressed-token decoder where a 32-bit signed counter is not checked for overflow, allowing a malicious sender to trigger an overflow that causes the receiver process to read and return data from outside the intended buffer bounds. Attackers can exploit this vulnerability to disclose process memory contents including environment variables, passwords, heap and stack data, and library memory pointers, significantly reducing ASLR effectiveness and facilitating further exploitation.

Weakness classification

  • disclosure@vulncheck.com: CWE-125
  • 0b0ca135-0b70-47e7-9f44-1890c2a1c46c: CWE-190

Primary references