CVE-2023-5174

At a glance

Severity: CRITICAL 9.8
EPSS: EPSS 1.20 % · percentile 68 (2026-10-27)
State: PUBLISHED
Published: 2023-09-27
Updated: 2025-05-05
Assigner: mozilla
NVD status: Modified

Description

If Windows failed to duplicate a handle during process creation, the sandbox code may have inadvertently freed a pointer twice, resulting in a use-after-free and a potentially exploitable crash. *This bug only affects Firefox on Windows when run in non-standard configurations (such as using `runas`). Other operating systems are unaffected.* This vulnerability affects Firefox < 118, Firefox ESR < 115.3, and Thunderbird < 115.3.

Scores

Version	Score	Vector	Scored by
CVSS 3.1	CRITICAL 9.8	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H	CISA-ADP
CVSS 3.1	CRITICAL 9.8	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H	NVD · nvd@nist.gov (Primary)
CVSS 3.1	CRITICAL 9.8	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H	NVD · 134c704f-9b21-4f2e-91b3-4a467353bcc0 (Secondary)

Weaknesses (CWE)

CWE-416

European references

ENISA EUVD · EUVD-2023-57511
GCVE · GCVE-0-2023-5174

CERT-FR advisories

CERTFR-2023-AVI-0783 — Multiples vulnérabilités dans les produits Mozilla · cert.ssi.gouv.fr

Affected configurations (NVD CPE)

cpe:2.3:a:mozilla:firefox:*:*:*:*:*:*:*:* < 118
cpe:2.3:a:mozilla:firefox_esr:*:*:*:*:*:*:*:* < 115.3
cpe:2.3:a:mozilla:thunderbird:*:*:*:*:*:*:*:* < 115.3

Affected products

Product	Versions
Mozilla · Firefox	affected unspecified < 118
Mozilla · Firefox ESR	affected unspecified < 115.3
Mozilla · Thunderbird	affected unspecified < 115.3

References

Sources

Source	Licence
CVE List (CVEProject cvelistV5)	CVE Program Terms of Use
EPSS (FIRST.org)	FIRST — attribution requested
ENISA EUVD	ENISA — reproduction authorised, source acknowledged
CERT-FR (ANSSI)	Licence Ouverte / Etalab 2.0
NVD (NIST) via fkie-cad/nvd-json-data-feeds	Public domain — this product uses data from the NVD API but is not endorsed or certified by the NVD