CVE-2018-18512

Severity: critical (CVSS 9.8 v3.0)
Exploited in the wild: not listed in CISA KEV
EPSS: 1.6% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2019-04-26 · updated 2026-06-17
Weakness: CWE-416

Description

A use-after-free vulnerability can occur while playing a sound notification in Thunderbird. The memory storing the sound data is immediately freed, although the sound is still being played asynchronously, leading to a potentially exploitable crash. This vulnerability affects Thunderbird < 60.5.

Affected products

Mozilla Thunderbird: before 65.0 — fixed in 65.0

How to fix

Upgrade to a fixed version: Mozilla Thunderbird 65.0. Check the vendor advisory for mitigations.

References

https://bugzilla.mozilla.org/show_bug.cgi?id=1482659
https://www.mozilla.org/security/advisories/mfsa2019-03/
https://bugzilla.mozilla.org/show_bug.cgi?id=1482659
https://www.mozilla.org/security/advisories/mfsa2019-03/

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