CVE-2017-7801

CRITICALNVD 9.89.8—
EchelonGraph scoreMEDIUM confidence

Score 9.8 from GitHub Security Advisory (severity: CRITICAL) published 2022-05-14. NVD baseline CVSS 9.8; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, nvd
Trending — 3 sources updated this week
9.8
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS: 3%CVSS: 9.8Exploit: NoneExposed: 0

A fix is available — apply it.

A use-after-free vulnerability can occur while re-computing layout for a "marquee" element during window resizing where the updated style object is freed while still in use. This results in a potentially exploitable crash. This vulnerability affects Thunderbird < 52.3, Firefox ESR < 52.3, and Firefox < 55.

CVSS v3
9.8
EG Score
9.8(medium)
EG Risk
50(Track)
EG Risk 50/100SSVC: Track

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
Severity98% × 45%
Exploitation3% × 40%
Automatability30% × 15%
Action: Routine — remediate on your standard cadence.
EPSS
84.2%
KEV
Not listed

Published

June 11, 2018

Last Modified

November 25, 2025

Advisory Details (10)

Auto-updated Jun 6, 2026
Patch available. Sources: redhat.
generic

Security vulnerabilities fixed in Firefox ESR 52.3 — Mozilla

https://www.mozilla.org/security/advisories/mfsa2017-19/
generic

Security vulnerabilities fixed in Firefox 55 — Mozilla

https://www.mozilla.org/security/advisories/mfsa2017-18/
generic

[SECURITY] [DSA 3968-1] icedove/thunderbird security update

https://www.debian.org/security/2017/dsa-3968
generic

[SECURITY] [DSA 3928-1] firefox-esr security update

https://www.debian.org/security/2017/dsa-3928
generic

Mozilla Thunderbird: Multiple vulnerabilities (GLSA 201803-14) — Gentoo security

https://security.gentoo.org/glsa/201803-14
generic

1371259 - (CVE-2017-7801) heap-use-after-free in nsComputedDOMStyle::UpdateCurrentStyleSources

https://bugzilla.mozilla.org/show_bug.cgi?id=1371259
redhat Patch Available

Affected: Red Hat Enterprise Linux 6 and Red Hat Enterprise Linux 7.

https://access.redhat.com/errata/RHSA-2017:2534
redhat Patch Available

Affected: Red Hat Enterprise Linux 6 and Red Hat Enterprise Linux 7.

https://access.redhat.com/errata/RHSA-2017:2456
generic
http://www.securitytracker.com/id/1039124
generic
http://www.securityfocus.com/bid/100197

Patch Availability(4)

Vendor / EcosystemFixed in / PatchReleasedSource
ubuntufirefox (55.0.1+build2-0ubuntu0.17.04.2) @ zesty2026-05-28ubuntu
ubuntuthunderbird (1:52.3.0+build1-0ubuntu0.17.04.1) @ zesty2026-05-28ubuntu
redhatthunderbird-0:52.3.0-1.el7_42017-08-24redhat
redhatfirefox-0:52.3.0-2.el7_42017-08-10redhat

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.

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

All Vendor Advisories

(4)

Every vendor that published an advisory referencing this CVE — pulled from our cve_vendor_advisories aggregation. Click any row for the vendor's original advisory page.

Data Freshness Timeline

(refreshed 14× in last 7d / 44× 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.

  1. 2026-07-23 01:30 UTCEG score recompute
  2. 2026-07-22 22:10 UTCEG score recompute
  3. 2026-07-22 14:04 UTCEPSS rescore
  4. 2026-07-21 15:21 UTCEPSS rescore
  5. 2026-07-21 11:17 UTCOSV refresh
  6. 2026-07-20 17:04 UTCEPSS rescore
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  8. 2026-07-19 14:28 UTCEPSS rescore
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  1. 2026-07-06 16:24 UTCEPSS rescore
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  3. 2026-07-06 02:20 UTCEPSS rescore
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  5. 2026-07-05 02:27 UTCEPSS rescore
  6. 2026-07-04 06:28 UTCEPSS rescore
  7. 2026-07-04 06:28 UTCEPSS rescore
  8. 2026-07-04 06:26 UTCOSV refresh
  9. 2026-07-02 16:54 UTCEPSS rescore
  10. 2026-07-01 15:03 UTCEPSS rescore
  11. 2026-06-30 23:19 UTCEPSS rescore
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  16. 2026-06-27 03:06 UTCEPSS rescore
  17. 2026-06-25 13:47 UTCEPSS rescore
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  26. 2026-06-19 19:23 UTCEPSS rescore
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  28. 2026-06-18 17:50 UTCEPSS rescore
  29. 2026-06-17 17:50 UTCEPSS rescore
  30. 2026-06-16 17:50 UTCEPSS rescore
  31. 2026-06-15 18:13 UTCOSV refresh
  32. 2026-06-15 17:45 UTCEPSS rescore
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  42. 2026-06-08 14:14 UTCEPSS rescore
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  44. 2026-06-07 15:22 UTCEPSS rescore
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  46. 2026-06-06 13:45 UTCEPSS rescore
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  50. 2026-06-05 06:08 UTCEPSS rescore
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  56. 2026-06-01 13:49 UTCEPSS rescore
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  58. 2026-05-31 22:28 UTCEPSS rescore
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  63. 2026-05-28 13:42 UTCEPSS rescore
  64. 2026-05-28 06:51 UTCEG score recompute
  65. 2026-05-28 06:51 UTCVendor advisory
  66. 2026-05-28 06:51 UTCGHSA enrichment
  67. 2026-05-27 13:38 UTCEPSS rescore
  68. 2026-05-27 13:38 UTCEPSS rescore
  69. 2026-05-26 17:01 UTCOSV refresh
  70. 2026-05-26 13:42 UTCEPSS rescore
  71. 2026-05-26 07:17 UTCEPSS rescore
  72. 2026-05-26 07:17 UTCEPSS rescore

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Frequently asked(5)

What is CVE-2017-7801?
CVE-2017-7801 is a critical vulnerability published on June 11, 2018. A use-after-free vulnerability can occur while re-computing layout for a "marquee" element during window resizing where the updated style object is freed while still in use. This results in a potentially exploitable crash. This vulnerability affects Thunderbird < 52.3, Firefox ESR < 52.3, and…
When was CVE-2017-7801 disclosed?
CVE-2017-7801 was first published in the National Vulnerability Database on June 11, 2018, with the most recent update on November 25, 2025. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2017-7801 actively exploited?
CVE-2017-7801 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 84.2% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2017-7801?
CVE-2017-7801 has a CVSS v3 base score of 9.8 (NVD).
How do I remediate CVE-2017-7801?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2017-7801, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

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