CVE-2023-29537

Severity: high (CVSS 7.5 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.6% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2023-06-02 · updated 2026-08-19
Weakness: CWE-362

Description

Multiple race conditions in the font initialization could have led to memory corruption and execution of attacker-controlled code. This vulnerability affects Firefox for Android < 112, Firefox < 112, and Focus for Android < 112.

Affected products

Mozilla Firefox: before 112.0 — fixed in 112.0
Mozilla Firefox for Android: before 112.0 — fixed in 112.0
Mozilla Focus: before 112.0 — fixed in 112.0

How to fix

Upgrade to a fixed version: Mozilla Firefox 112.0; Mozilla Firefox for Android 112.0; Mozilla Focus 112.0. Check the vendor advisory for mitigations.

References

https://bugzilla.mozilla.org/show_bug.cgi?id=1823365
https://bugzilla.mozilla.org/show_bug.cgi?id=1824200
https://bugzilla.mozilla.org/show_bug.cgi?id=1825569
https://www.mozilla.org/security/advisories/mfsa2023-13/
https://bugzilla.mozilla.org/show_bug.cgi?id=1823365
https://bugzilla.mozilla.org/show_bug.cgi?id=1824200
https://bugzilla.mozilla.org/show_bug.cgi?id=1825569
https://www.mozilla.org/security/advisories/mfsa2023-13/

Get alerted when CVE-2023-29537 or the next vulnerability affects your stack