CVE-2024-12084 — Rsync: heap buffer overflow in rsync due to improper checksum length handling

Triage

Is it exploited, how likely is exploitation, what does it touch, and how severe do the sources call it.

CISA SSVC assessment CISA

Three decision points CISA publishes for the CVEs it assesses (SSVC 2.0.3). A stakeholder decision, not a severity score.

Remediation

Fixes and mitigations documented by the sources — linked to the original advisory.

No fix documented by the sources we poll. That does not mean none exists: check the vendor advisory.

First 24 hours

Ordered from the record’s own fields — exposure first, because you cannot patch what you have not found. A rule-generated starting point.

1. Identify exposed assets running the affected vendor/product/version combinations (Almalinux Almalinux, Archlinux Arch Linux, Gentoo Linux…).
2. The attack is network-based and needs no privileges: restrict exposure (ACLs, VPN, WAF) until patched.
3. No fix documented in the sources: reduce exposure and monitor the vendor advisory.
4. EPSS ahead of 99% of scored CVEs: prioritize it in the patch queue.
5. Search available logs for exploit probes matching the vulnerability class (memory corruption), errors and authentication anomalies.

Affected scope

Vendor, product and versions as the sources word them.

Attack characteristics

The CVSS vector, decoded. It describes the attack, not your exposure to it.

Every base score collected

Sources score independently and may disagree; each row says who scored it and under which version.

Weakness MITRE

Weakness class according to MITRE’s CWE catalog.

CWE-787 · Out-of-bounds Write

Other CVEs with this weakness →

Detection

Read off the CVSS vector and the weakness class. Starting points, not tested rules.

• Prioritize edge telemetry for the network-reachable component (proxy, WAF, IDS/IPS).
• Correlate service crashes/restarts with inbound traffic; repeated crashes may indicate attempts.

Timeline

What happened to this CVE, newest first.

• 2026
• Affected products added · red hat/red hat enterprise linux 10
  Oct 21, 2026 · CVE Program (cve.org) e CISA ADP
• SSVC assessment updated
  Oct 21, 2026 · CVE Program (cve.org) e CISA ADP
• Record published
  Oct 21, 2026
• Affected products added · samba/rsync, almalinux/almalinux, archlinux/arch linux, gentoo/linux, nixos/nixos, novell/suse linux, tritondatacenter/s
  Oct 21, 2026 · NIST National Vulnerability Database
• CVSS changed · 9.8
  Oct 21, 2026 · NIST National Vulnerability Database
• Source status changed · → Modified
  Oct 21, 2026 · NIST National Vulnerability Database
• Record created in this database
  Oct 21, 2026 · Alertas do Telegram
• 2025
• CVE published
  Jan 15, 2025 · redhat

Source activity

Repeated readings are counted rather than listed.

• 2× References added · Oct 21, 2026 – Oct 21, 2026
• 1× Official description updated · Oct 21, 2026 – Oct 21, 2026

References

11 on the record

• github.com/google/security-research/security/advisories/GHSA-p5pg-x43v-mvqj
  Exploit, Vendor Advisory, NIST National Vulnerability Database
• security.netapp.com/advisory/ntap-20250131-0002
  GitHub Security Advisories
• www.kb.cert.org/vuls/id/952657
  NIST National Vulnerability Database
• security.netapp.com/advisory/ntap-20250131-0002/
  NIST National Vulnerability Database
• access.redhat.com/security/cve/CVE-2024-12084
  Third Party Advisory, vdb-entry, x_refsource_REDHAT, NIST National Vulnerability Database
• nvd.nist.gov/vuln/detail/CVE-2024-12084
  GitHub Security Advisories
• github.com/advisories/GHSA-85h7-m8c3-v9wc
  GitHub Security Advisories
• bugzilla.redhat.com/show_bug.cgi
  Issue Tracking, Third Party Advisory, issue-tracking, x_refsource_REDHAT, NIST National Vulnerability Database
• access.redhat.com/errata/RHBA-2025:6470
  vendor-advisory, x_refsource_REDHAT, NIST National Vulnerability Database
• www.openwall.com/lists/oss-security/2025/01/14/6
  Mailing List, Third Party Advisory, NIST National Vulnerability Database
• kb.cert.org/vuls/id/952657
  Third Party Advisory, NIST National Vulnerability Database

Elsewhere on this site

Related CVEs (same products)

• High CVE-2026-115486 Open-iscsi: open-iscsi: ipv6 neighbor discovery missing option length validation in iscsiuio allows arp table poisoning 12m
• Medium CVE-2026-115485 Open-iscsi: open-iscsi: dhcpv6 vendor option strlen heap out-of-bounds read and 1-byte write in iscsiuio 12m
• High CVE-2026-115484 Open-iscsi: open-iscsi: dhcpv4 option parser heap out-of-bounds read in iscsiuio parse_msg 12m
• Low CVE-2026-115449 Libslirp: libslirp: icmp echo reply length desynchronization leaks host ip to guest 3h
• Medium CVE-2026-115221 Ipa: freeipa: freeipa uses subject cn as proof of certificate ownership 3h
• Medium CVE-2026-115207 Patch: filename validation bypass in reversal fallback allows file creation outside the working directory 14h

Not in any source we poll

Listed rather than left blank: an empty field and an unmeasured one look identical on screen, and only one is a reason to look elsewhere.

• No fixed version, patch or mitigation documented.
• No confirmed IOCs, IP addresses, domains, file hashes, or malware artifacts supplied.
• No organization-specific asset inventory, compensating-control status, or patch deployment evidence supplied.
• No exploit packet captures, log samples, or incident case IDs supplied.

Answered from this record

Text assembled only from the fields above — no additional claims.

What should defenders know first?

CVE-2024-12084 is "Rsync: heap buffer overflow in rsync due to improper checksum length handling", rated Critical. It affects Almalinux (Almalinux); versions are in the scope table. It is not in CISA KEV, which does not rule out exploitation. CVSS 9.8 describes technical severity. EPSS 72.06% estimates the probability of exploitation in 30 days; neither replaces your asset context. First verify whether exposed or business-critical assets run the affected versions, apply vendor fixes or mitigations, and preserve logs for review.

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