CVE-2018-18512 Use after free in Thunderbird

What is CVE-2018-18512?

CVE-2018-18512 is a critical use after free vulnerability in Mozilla Thunderbird, published on 26 Apr 2019. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official 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.

Weakness: CWE-416

Which versions are affected by CVE-2018-18512?

It affects 1 product.

Products include Mozilla Thunderbird.

How do I fix CVE-2018-18512?

Upgrade to a fixed version.

Upgrade to the fixed version. These bugs are found with fuzzing and sanitisers and avoided by memory-safe languages. More about Use after free.

Is CVE-2018-18512 being exploited?

There is no known exploitation of CVE-2018-18512 in the wild and no public exploit code.

Other vulnerabilities in Mozilla Thunderbird

• CVE-2026-92238 Ambiguous parsing of mail headers Critical 9.8
• CVE-2026-84637 Calendar invitation attachments could launch local executables Critical 9.8
• CVE-2021-43529 Memory corruption in Thunderbird Critical 9.8
• CVE-2019-11703 Memory corruption in Thunderbird Critical 9.8
• CVE-2019-11704 Memory corruption in Thunderbird Critical 9.8

All Mozilla Thunderbird vulnerabilities

Sources

• CVE record
• NVD
• OSV
• GitHub advisory
• How this page is made

Also known as DEBIAN-CVE-2018-18512, GHSA-2mgp-6265-vwf6.