CVE-2015-4484: n/a vulnerability

CVE-2015-4484: The js::jit::AssemblerX86Shared::lock_addl function in the JavaScript implementation in Mozilla Firefox bef...

The js::jit::AssemblerX86Shared::lock_addl function in the JavaScript implementation in Mozilla Firefox before 40.0 and Firefox ESR 38.x before 38.2 allows remote attackers to cause a denial of service (application crash) by leveraging the use of shared memory and accessing (1) an Atomics object or (2) a SharedArrayBuffer object.

UnknownCVSS not scoredNot KEV-listedUpdatedAug 6, 2024, 06:18 UTC (UTC+00:00)

Security readout for executives and security teams

CVE-2015-4484 is an old Mozilla Firefox denial-of-service flaw. A malicious web page could crash vulnerable Firefox versions by exercising shared-memory JavaScript features. The sources describe application crash impact, not data theft or remote code execution. Exposure is most likely limited to legacy endpoints still running Firefox before 40.0 or Firefox ESR 38.x before 38.2, including distribution-packaged browser builds referenced by vendor advisories. Treat as low urgency unless legacy Firefox remains in production. The business risk is user disruption from browser crashes, not confirmed compromise. Remediate through standard endpoint patching and legacy software cleanup. Mitigation focus: Upgrade Firefox to 40.0 or later, or ESR 38.2 or later.; Apply relevant Linux distribution browser security updates.; Retire unsupported Firefox or ESR builds from managed endpoints..

Prepared: Jun 13, 2026, 22:22 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

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Vulnerability profileCVE Program record

Severity: Unknown
CVSS: Not scored
Known Exploited: No
Published: Aug 16, 2015, 01:00 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

3Source 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
https://bugzilla.mozilla.org/show_bug.cgi?id=1171540CVE reference · x_refsource_CONFIRM
GLSA-201605-06CVE reference · vendor-advisory, x_refsource_GENTOO

Affected products

Products and packages named in the record

VendorProductVersion / packageStatus

n/an/an/aListed

Weakness

CWE details

No CWE listed

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