CVE-2017-7818

Original summary

Normalized public record · Updated Oct 23, 2026

A use-after-free vulnerability can occur when manipulating arrays of Accessible Rich Internet Applications (ARIA) elements within containers through the DOM. This results in a potentially exploitable crash. This vulnerability affects Firefox < 56, Firefox ESR < 52.4, and Thunderbird < 52.4.

Publisher and source text is retained separately from QFinch interpretation.

Affected products

Matching a version is only one part of assessing exposure. QFinch has not assessed your environment on this public page.

Remediation

Apply the vendor-supported fixed release or mitigation, then verify the affected component is no longer reachable.

1. Confirm the affected product and reachable code path exist in your environment.
2. Apply the vendor-supported patch or mitigation from the primary advisory.
3. Rescan the exact deployed revision and retain verification evidence.

Evidence coverage

SSVC priority

MEDIUM

Confidence

20%

Aliases

None reported

Scores appear only when corresponding evidence exists. Missing data is never interpreted as zero risk.

Sources and record history

1. [debian-lts-announce] 20171101 [SECURITY] [DLA 1153-1] icedove/thunderbird security update ↗
2. Security advisory ↗
3. 1039465 ↗
4. RHSA-2017:2831 ↗
5. RHSA-2017:2885 ↗
6. Security advisory ↗
7. 101055 ↗
8. bugzilla.mozilla.org ↗
9. DSA-4014 ↗
10. Security advisory ↗
11. DSA-3987 ↗
12. GLSA-201803-14 ↗

Record history

Published Jun 11, 2018 · Last refreshed Oct 23, 2026