CVE-2017-5436 — An out-of-bounds write in the Graphite 2 library triggered with a maliciously crafted Graphite...

Triage

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

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 (Debian Debian Linux, Mozilla Firefox, Mozilla Firefox ESR…).
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. Exploitation requires user interaction: tighten email/web filtering and warn affected users.
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 · mozilla/thunderbird, mozilla/firefox esr, mozilla/firefox
  Oct 16, 2026 · CVE Program (cve.org) e CISA ADP
• Record published
  Oct 16, 2026
• Affected products added · debian/debian linux, redhat/enterprise linux, redhat/enterprise linux desktop, redhat/enterprise linux server, redhat/en
  Oct 16, 2026 · NIST National Vulnerability Database
• CVSS changed · 8.8
  Oct 16, 2026 · NIST National Vulnerability Database
• Source status changed · → Analyzed
  Oct 16, 2026 · NIST National Vulnerability Database
• Record created in this database
  Oct 16, 2026 · Alertas do Telegram
• 2018
• CVE published
  Jun 11, 2018 · mozilla

Source activity

Repeated readings are counted rather than listed.

• 2× References added · Oct 16, 2026 – Oct 16, 2026
• 1× Official description updated · Oct 16, 2026 – Oct 16, 2026

References

18 on the record

• www.mozilla.org/security/advisories/mfsa2017-13/
  Vendor Advisory, x_refsource_CONFIRM, NIST National Vulnerability Database
• www.mozilla.org/security/advisories/mfsa2017-11/
  Vendor Advisory, x_refsource_CONFIRM, NIST National Vulnerability Database
• www.mozilla.org/security/advisories/mfsa2017-10/
  Vendor Advisory, x_refsource_CONFIRM, NIST National Vulnerability Database
• www.mozilla.org/security/advisories/mfsa2017-12/
  Vendor Advisory, x_refsource_CONFIRM, NIST National Vulnerability Database
• bugzilla.mozilla.org/show_bug.cgi
  Issue Tracking, Vendor Advisory, x_refsource_CONFIRM, NIST National Vulnerability Database
• security.gentoo.org/glsa/201706-25
  Third Party Advisory, vendor-advisory, x_refsource_GENTOO, NIST National Vulnerability Database
• www.mozilla.org/security/advisories/mfsa2017-11
  GitHub Security Advisories
• access.redhat.com/errata/RHSA-2017:1201
  Third Party Advisory, vendor-advisory, x_refsource_REDHAT, NIST National Vulnerability Database
• www.securityfocus.com/bid/97940
  Third Party Advisory, VDB Entry, vdb-entry, x_refsource_BID, NIST National Vulnerability Database
• www.debian.org/security/2017/dsa-3831
  Third Party Advisory, vendor-advisory, x_refsource_DEBIAN, NIST National Vulnerability Database
• access.redhat.com/errata/RHSA-2017:1106
  Third Party Advisory, vendor-advisory, x_refsource_REDHAT, NIST National Vulnerability Database
• access.redhat.com/errata/RHSA-2017:1104
  Third Party Advisory, vendor-advisory, x_refsource_REDHAT, NIST National Vulnerability Database
• www.mozilla.org/security/advisories/mfsa2017-10
  GitHub Security Advisories
• github.com/advisories/GHSA-7cg6-cw82-vmx2
  GitHub Security Advisories
• www.mozilla.org/security/advisories/mfsa2017-13
  GitHub Security Advisories
• www.securitytracker.com/id/1038320
  Third Party Advisory, VDB Entry, vdb-entry, x_refsource_SECTRACK, NIST National Vulnerability Database
• nvd.nist.gov/vuln/detail/CVE-2017-5436
  GitHub Security Advisories
• www.mozilla.org/security/advisories/mfsa2017-12
  GitHub Security Advisories

Elsewhere on this site

Related CVEs (same products)

• Medium CVE-2026-104045 Sssd: sssd: denial of service via race condition in autofs responder 10d
• Medium CVE-2026-104046 Sssd: sssd: denial of service via incomplete identity provider authentication requests 10d
• High CVE-2026-104048 Sssd: sssd: authorization bypass via cross-domain username collision in hbac evaluation 10d
• Medium CVE-2026-104047 Sssd: sssd: information disclosure via query injection in entra id lookups 10d
• Critical CVE-2026-106016 Mitigation bypass in the File Handling component 10d
• Medium CVE-2026-104040 Sssd: sssd: information disclosure via odata injection in entra id lookups 11d

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 CISA SSVC assessment.
• 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-2017-5436 is "An out-of-bounds write in the Graphite 2 library triggered with a maliciously crafted Graphite...", rated High. It affects Debian Linux (Debian); versions are in the scope table. It is not in CISA KEV, which does not rule out exploitation. CVSS 8.8 describes technical severity. EPSS 2.38% 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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