CVE-2012-4216: n/a vulnerability

CVE-2012-4216: Use-after-free vulnerability in the gfxFont::GetFontEntry function in Mozilla Firefox before 17.0, Firefox...

Use-after-free vulnerability in the gfxFont::GetFontEntry function in Mozilla Firefox before 17.0, Firefox ESR 10.x before 10.0.11, Thunderbird before 17.0, Thunderbird ESR 10.x before 10.0.11, and SeaMonkey before 2.14 allows remote attackers to execute arbitrary code or cause a denial of service (heap memory corruption) via unspecified vectors.

UnknownCVSS not scoredNot KEV-listedUpdatedAug 6, 2024, 20:28 UTC (UTC+00:00)

Security readout for executives and security teams

This old Mozilla flaw could let a malicious remote attacker crash affected browsers or mail clients, and possibly run code, through a memory corruption issue. It matters mainly where legacy Firefox, Thunderbird, SeaMonkey, or distro-packaged variants remain in use. Exposure is most likely on unmanaged or legacy endpoints, kiosks, embedded desktops, or old Linux distributions still running the affected Mozilla application versions. Modern fully updated systems are unlikely to be exposed. Treat as high priority only if legacy Mozilla clients remain in the environment. For current managed endpoints, confirm absence through inventory rather than launching a broad emergency response. Mitigation focus: Upgrade affected Mozilla products to the fixed versions or later.; Apply relevant Linux vendor security updates from Ubuntu, Red Hat, Debian, or SUSE.; Remove unsupported legacy Firefox, Thunderbird, and SeaMonkey installations..

Prepared: Jun 24, 2026, 12:04 UTC (UTC+00:00)

Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.

Potential ATT&CK relevance

Conservative CVE-to-ATT&CK context

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Execution behavior lookup

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CVE-2012-4216 mapping review

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Vulnerability profileCVE Program record

Severity: Unknown
CVSS: Not scored
Known Exploited: No
Published: Nov 21, 2012, 11:00 UTC (UTC+00:00)

Official CVE source material

CNA and ADP enrichment extracted from CVE v5

These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.

0CVSS vectors

0Timeline events

0ADP providers

4Source links

CVSS and timeline data

No CVSS vectors or timeline events were available in the normalized CVE source material.

Source materials

CVE List V5 sourceCVE List V5
firefox-getfontentry-code-exec(80189)CVE reference · vdb-entry, x_refsource_XF
https://bugzilla.mozilla.org/show_bug.cgi?id=798853CVE reference · x_refsource_CONFIRM
oval:org.mitre.oval:def:16902CVE reference · vdb-entry, signature

Affected products

Products and packages named in the record

VendorProductVersion / packageStatus

n/an/an/aListed

Weakness

CWE details

No CWE listed

CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.