CVE-2023-4049

MEDIUM

Firefox < 116 - Use-After-Free via Reference Counting Race Condition

Title source: llm

Description

Race conditions in reference counting code were found through code inspection. These could have resulted in potentially exploitable use-after-free vulnerabilities. This vulnerability affects Firefox < 116, Firefox ESR < 102.14, and Firefox ESR < 115.1.

References (8)

Core 8

Core References

Issue Tracking, Permissions Required

https://bugzilla.mozilla.org/show_bug.cgi?id=1842658

Third Party Advisory

https://www.debian.org/security/2023/dsa-5464

Third Party Advisory

https://www.debian.org/security/2023/dsa-5469

Vendor Advisory

https://www.mozilla.org/security/advisories/mfsa2023-29/

Vendor Advisory

https://www.mozilla.org/security/advisories/mfsa2023-30/

Vendor Advisory

https://www.mozilla.org/security/advisories/mfsa2023-31/

Mailing List

https://lists.debian.org/debian-lts-announce/2023/08/msg00008.html

Mailing List

https://lists.debian.org/debian-lts-announce/2023/08/msg00010.html

Scores

CVSS v3 5.9

EPSS 0.0021

EPSS Percentile 43.8%

Attack Vector NETWORK

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H

CISA SSVC

Vulnrichment

Exploitation none

Automatable no

Technical Impact partial

Details

CWE

CWE-362

Status published

Products (3)

debian/debian_linux 11.0

debian/debian_linux 12.0

mozilla/firefox < 116.0

Published Aug 01, 2023

Tracked Since Feb 18, 2026