Rsync < 3.4.3 Integer Overflow Information Disclosure_CVE-2026-43618

6.1 / 10

MEDIUM

CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:H/VI:N/VA:H/SC:N/SI:N/SA:N

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.

Basic Information

ID CVE-2026-43618

Source VulnCheck

Published May 20, 2026 at 00:50

Affected Product

Vendor RsyncProject

Product rsync

Affected Versions RsyncProject rsync 0

CWE Classification

CWE-190 CWE-125

References

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    "lastseen": "",
    "description": "Rsync version\u00a03.4.2 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.",
    "published": "2026-05-20T00:50:21.416Z",
    "modified": "2026-05-20T00:50:21.416Z",
    "type": "cve",
    "title": "Rsync < 3.4.3 Integer Overflow Information Disclosure",
    "source": "VulnCheck",
    "references": "https://github.com/RsyncProject/rsync/security/advisories/GHSA-g37v-g3gj-pmwq\nhttps://github.com/RsyncProject/rsync/releases/tag/v3.4.3\nhttps://www.vulncheck.com/advisories/rsync-integer-overflow-information-disclosure",
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    "sourceData": "RsyncProject rsync 0",
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    "cvss": {
        "score": 6.1,
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