CVE-2023-6858 - CVE House
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Status published Unknown CVE-2023-6858

Firefox was susceptible to a heap buffer overflow in `nsTextFragment`...

Vulnerability Description

Firefox was susceptible to a heap buffer overflow in `nsTextFragment` due to insufficient OOM handling. This vulnerability affects Firefox ESR < 115.6, Thunderbird < 115.6, and Firefox < 121.

Impact Analysis

Refer to official advisory for detailed impact metrics.

Remediation

Ensure systems are updated to the latest vendor-supplied patch levels.

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Credits & Attribution

The following person or organization is credited with identifying this vulnerability, as recorded in the NVD database:

  • Irvan Kurniawan

References

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Affected Vendor

Affected Software

Firefox ESR, Thunderbird, Firefox
Vulnerable Versions:
unspecified

Timeline

Official Publish: December 19th, 2023
Last Modified: May 7th, 2025
Added to House: July 22nd, 2026

CVSS Vectors

No vector data available

Weaknesses (CWE)

No CWE data available

MITRE ATT&CK TTPs

No associated TTPs found for this vulnerability.