CVE-2024-12084

A heap-based buffer overflow flaw was found in the rsync daemon. This issue is due to improper handling of attacker-controlled checksum lengths (s2length) in the code. When MAX_DIGEST_LEN exceeds the fixed SUM_LENGTH (16 bytes), an attacker can write out of bounds in the sum2 buffer.

CVSS 3.1

9.8CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

EPSS

73% chance of exploitation in the next 30 days; higher than 99% of CVEs (scores of 2026-10-25)

CWEs

CWE-787, CWE-122

Published

2025-01-15

Modified

2026-10-21

Record from

the NVD, synced 2026-10-22

Affected

• almalinux:almalinux
• archlinux:arch_linux
• gentoo:linux
• nixos:nixos
• novell:suse_linux
• redhat:enterprise_linux
• samba:rsync
• tritondatacenter:smartos

References

• https://access.redhat.com/errata/RHBA-2025:6470
• https://access.redhat.com/security/cve/CVE-2024-12084
• https://bugzilla.redhat.com/show_bug.cgi?id=2330527
• https://kb.cert.org/vuls/id/952657
• http://www.openwall.com/lists/oss-security/2025/01/14/6

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