CVE-2023-5174

CRITICAL

Firefox < 118, Firefox ESR < 115.3, Thunderbird < 115.3 - Use-After-Free via Sandbox Handle Duplication

Title source: llm
STIX 2.1

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.

References (4)

Core 4

Scores

CVSS v3 9.8
EPSS 0.0044
EPSS Percentile 63.6%
Attack Vector NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

CISA SSVC

Vulnrichment
Exploitation none
Automatable yes
Technical Impact total

Details

CWE
CWE-416
Status published
Products (3)
mozilla/firefox < 118
mozilla/firefox_esr < 115.3
mozilla/thunderbird < 115.3
Published Sep 27, 2023
Tracked Since Feb 18, 2026