CVE-2016-1523

MEDIUMNVD 6.56.5—
EchelonGraph scoreMEDIUM confidence

Score 6.5 from GitHub Security Advisory published 2022-05-17. NVD baseline CVSS 6.5; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, nvd
6.5EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 2.3%CVSS: 6.5Exploit: None knownExposed services: Not assessed

A fix is available — apply it.

The SillMap::readFace function in FeatureMap.cpp in Libgraphite in Graphite 2 1.2.4, as used in Mozilla Firefox before 43.0 and Firefox ESR 38.x before 38.6.1, mishandles a return value, which allows remote attackers to cause a denial of service (missing initialization, NULL pointer dereference, and application crash) via a crafted Graphite smart font.

CVSS v3
6.5
EG Score
6.5MEDIUMmedium confidence
EG Risk
35
EG Risk 35/100CISA SSVC

EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).

How it’s computed
Severity65% × 45%
Exploitation2% × 40%
Automatability30% × 15%
CISA SSVC: Track at low or medium mission impact; Track or Attend at high (mission-essential systems).
Action: A fix is available. Apply it within your standard update timelines at low or medium mission impact and sooner than that at high.
EPSS PROB
2.3%
EPSS %ILE
82nd
KEV
Not listed

CISA SSVCTrack at low or medium mission impact; Track or Attend at high (mission-essential systems).

A fix is available. Apply it within your standard update timelines at low or medium mission impact and sooner than that at high.

Exploitation none (no KEV listing, exploit record or EPSS ≥ 50%) · Automatable unknown (not published for this CVE) · Technical impact partial (CVSS below 9.0). Mission impact is CISA's Mission & Well-being decision point, and only you can judge it: high means the affected system is essential to your organisation's mission, or its compromise could cause irreversible harm to people. CISA's decision table

Published

February 13, 2016

Last Modified

June 17, 2026

References (50)

Vendor Advisories for CVE-2016-1523(3)

These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.

Patch Availability(5)

Vendor / EcosystemFix (by version range) / PatchReleasedSource
ubuntuthunderbird (1:38.6.0+build1-0ubuntu0.15.10.1) @ wily2026-05-22ubuntu
ubuntulibgraphite2-3 (1.2.4-3ubuntu1.1) @ wily2026-05-22ubuntu
redhatgraphite2-0:1.3.6-1.el7_22016-04-05redhat
redhatthunderbird-0:38.6.0-1.el7_22016-02-18redhat
redhatfirefox-0:38.6.1-1.el7_22016-02-16redhat

Patches are aggregated from vendor advisories (Red Hat, Microsoft, Cisco, GitHub) and package ecosystems (OSV, GHSA). Multiple rows for the same upstream release have been deduplicated.

Affected Packages

(10 across 6 ecosystems)
Debian:7(3)
PackageVulnerable rangeFix by version rangeDependents
graphite21.1.3-1 ... 1.3.4-2 (27 versions)1.3.5-1~deb7u1 (one range)—
icedove10.0.12-1 ... 38.5.0-1~deb8u1 (84 versions)38.6.0-1~deb7u1 (one range)—
iceweasel10.0.12esr-1 ... 38.6.0esr-1~deb8u1 (177 versions)38.6.1esr-1~deb7u1 (one range)—
Debian:8(3)
PackageVulnerable rangeFix by version rangeDependents
graphite21.2.4-3 ... 1.3.5-1~deb7u1 (11 versions)1.3.5-1~deb8u1 (one range)—
icedove31.6.0-1 ... 38.6.0-1~deb7u1 (31 versions)38.6.0-1~deb8u1 (one range)—
iceweasel31.6.0esr-1 ... 38.6.1esr-1~deb7u1 (56 versions)38.6.1esr-1~deb8u1 (one range)—
Debian:11(1)
PackageVulnerable rangeFix by version rangeDependents
graphite2—1.3.5-1 (one range)—
Debian:12(1)
PackageVulnerable rangeFix by version rangeDependents
graphite2—1.3.5-1 (one range)—
Debian:13(1)
PackageVulnerable rangeFix by version rangeDependents
graphite2—1.3.5-1 (one range)—
Debian:14(1)
PackageVulnerable rangeFix by version rangeDependents
graphite2—1.3.5-1 (one range)—

Additional Vendor Advisories

(2)

Vendors that published advisories for this CVE beyond the curated set above. Broader coverage but minimal per-row detail — click through for the original advisory.

Data Freshness Timeline

(refreshed 6× in last 7d / 20× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

Showing the most recent 100 of 158 total refreshes for this CVE.

  1. 2026-10-05 17:38 UTCEPSS rescore
  2. 2026-10-04 23:17 UTCEPSS rescore
  3. 2026-10-03 14:21 UTCEPSS rescore
  4. 2026-10-01 19:43 UTCEPSS rescore
  5. 2026-09-30 14:58 UTCEPSS rescore
  6. 2026-09-30 09:11 UTCEG score recompute
  7. 2026-09-27 13:40 UTCEPSS rescore
  8. 2026-09-26 15:53 UTCEPSS rescore
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  10. 2026-09-24 13:59 UTCEPSS rescore
  11. 2026-09-23 13:41 UTCEPSS rescore
  12. 2026-09-19 15:35 UTCEPSS rescore
  13. 2026-09-19 02:36 UTCOSV refresh
  14. 2026-09-18 19:22 UTCEPSS rescore
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  24. 2026-08-31 06:19 UTCOSV refresh
  25. 2026-08-30 19:12 UTCEPSS rescore
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  1. 2026-08-27 14:20 UTCEPSS rescore
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  11. 2026-08-15 01:25 UTCEPSS rescore
  12. 2026-08-14 13:24 UTCOSV refresh
  13. 2026-08-12 13:46 UTCEPSS rescore
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  23. 2026-07-30 16:23 UTCEPSS rescore
  24. 2026-07-30 02:24 UTCOSV refresh
  25. 2026-07-30 01:26 UTCEPSS rescore
  26. 2026-07-28 15:31 UTCEPSS rescore
  27. 2026-07-26 14:50 UTCEPSS rescore
  28. 2026-07-25 14:13 UTCEPSS rescore
  29. 2026-07-23 14:14 UTCEPSS rescore
  30. 2026-07-23 01:21 UTCEG score recompute
  31. 2026-07-22 22:01 UTCEG score recompute
  32. 2026-07-22 14:04 UTCEPSS rescore
  33. 2026-07-21 15:21 UTCEPSS rescore
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  47. 2026-07-13 22:26 UTCEPSS rescore
  48. 2026-07-13 06:09 UTCEPSS rescore
  49. 2026-07-12 11:37 UTCOSV refresh
  50. 2026-07-12 05:43 UTCEPSS rescore
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  52. 2026-07-11 08:23 UTCEPSS rescore
  53. 2026-07-09 19:05 UTCEPSS rescore
  54. 2026-07-08 15:10 UTCEPSS rescore
  55. 2026-07-07 13:42 UTCEPSS rescore
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  61. 2026-07-04 06:28 UTCEPSS rescore
  62. 2026-07-01 15:02 UTCEPSS rescore
  63. 2026-06-30 23:19 UTCEPSS rescore
  64. 2026-06-29 14:03 UTCEPSS rescore
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  66. 2026-06-28 04:53 UTCEPSS rescore
  67. 2026-06-27 03:05 UTCEPSS rescore
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  73. 2026-06-23 21:30 UTCEPSS rescore
  74. 2026-06-23 17:00 UTCOSV refresh
  75. 2026-06-21 14:54 UTCEPSS rescore

Related CVEs(same product + same vendor)

Frequently asked(5)

What is CVE-2016-1523?
CVE-2016-1523 is a medium vulnerability published on February 13, 2016. The SillMap::readFace function in FeatureMap.cpp in Libgraphite in Graphite 2 1.2.4, as used in Mozilla Firefox before 43.0 and Firefox ESR 38.x before 38.6.1, mishandles a return value, which allows remote attackers to cause a denial of service (missing initialization, NULL pointer dereference,…
When was CVE-2016-1523 disclosed?
CVE-2016-1523 was first published on February 13, 2016, with the most recent update on June 17, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2016-1523 actively exploited?
CVE-2016-1523 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 2.3% probability of exploitation in the next 30 days (82nd percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2016-1523?
CVE-2016-1523 has a CVSS v3 base score of 6.5 (NVD).
How do I remediate CVE-2016-1523?
A fix for CVE-2016-1523 is available: update to the fixed version the vendor names in its advisory. The vendor advisories EchelonGraph has for CVE-2016-1523 are linked in the Vendor Advisories panel on this page.

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