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Back to active CVEs
Critical · CVSS 9.8CVE-2024-12084

Rsync: heap buffer overflow in rsync due to improper checksum length handlingCVE-2024-12084

Answer in brief

CVE-2024-12084 records a Critical severity (CVSS 9.8) vulnerability in Rsync: heap buffer overflow in rsync due to improper checksum length handling. The current sources do not mark it as known exploited. The current feed maps rsync (generic). Check affected ranges and fixed versions before updating.

Analysis pending evidence review

HOL Guard separates source facts from reviewed analysis. See the methodology.

Published Jan 15, 2025Updated Nov 4, 2026Source checked Nov 5, 2026First seen by HOL Jun 25, 2026Material review Nov 4, 2026
Upstream Advisory

Key facts

Risk
Critical · CVSS 9.8
Exploitation
Not marked as known exploited
Affected software
11 mapped packages or products
Fix availability
Not reported

Why this deserves its current priority

CVSS is 9.8. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.

Analysis status

Analysis pending evidence review

Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.

Affected scope and exposure questions

The current feed maps rsync (generic). Check affected ranges and fixed versions before updating.

Affected products and reported versions
ProductAffected versionsFixed versions
cpe:2.3:a:samba:rsync:3.2.7:-:*:*:*:*:*:*Not reportedNot reported
cpe:2.3:a:samba:rsync:3.3.0:-:*:*:*:*:*:*Not reportedNot reported
cpe:2.3:o:almalinux:almalinux:10.0:-:*:*:*:*:*:*Not reportedNot reported
cpe:2.3:o:archlinux:arch_linux:-:*:*:*:*:*:*:*Not reportedNot reported
cpe:2.3:o:gentoo:linux:-:*:*:*:*:*:*:*Not reportedNot reported
cpe:2.3:o:nixos:nixos:*:*:*:*:*:*:*:*Not reportedNot reported
cpe:2.3:o:nixos:nixos:24.11:*:*:*:*:*:*:*Not reportedNot reported
cpe:2.3:o:novell:suse_linux:-:*:*:*:*:*:*:*Not reportedNot reported
cpe:2.3:o:redhat:enterprise_linux:10.0:*:*:*:*:*:*:*Not reportedNot reported
cpe:2.3:o:tritondatacenter:smartos:*:*:*:*:*:*:*:*Not reportedNot reported
Mapped affected packages and fixed versions
PackageAffected rangeFixed version
rsyncgeneric3.2.7 || 3.3.0Not reported

Recommended response

  1. 1Check inventory. Check lockfiles and deployed manifests for rsync.
  2. 2Review the reported fix. Source-reported workaround: Red Hat recommends filtering untrusted connections to Rsync via firewall rules on the host and on network firewall appliances. Additionally, systems which only need to provide remote Rsync access to users with known identities can enable authentication using the ```auth users``` parameter in their rsyncd configuration file (rsyncd.conf). Systems that provide anonymous read access to hosted files via Rsync, such as mirror hosts, do not have reasonable mitigation options available. We strongly urge operators using vulnerable versions of Rsync to update as soon as possible.

Evidence timeline and material changes

  1. Published upstream

    Jan 15, 2025

    Evidence: source:cvelist:source_dates:source-dates:record

  2. Source modified

    Nov 4, 2026

    Evidence: source:cvelist:source_dates:source-dates:record

  3. First seen by HOL

    Jun 25, 2026

Sources and claim methodology

  • Source referenceaccess.redhat.com
  • Source referenceaccess.redhat.com
  • Source referencebugzilla.redhat.com
  • GitHub security advisorygithub.com
  • Source referencekb.cert.org
  • Source referencesecurity.netapp.com
  • Source referencekb.cert.org
  • Source referenceopenwall.com
Upstream source description

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.

Quoted source text, attributed separately from HOL analysis.

Record context

Vulnerability class
Memory Corruption
EPSS
Not reported
CWE IDs
CWE-122, CWE-787
Source
CVE List V5
Source checked
Nov 5, 2026
References
8 linked sources
Open source record