Description
A crash can occur when processing a crafted S/MIME message or an XPI package containing a crafted signature. This can be used as a denial-of-service (DOS) attack because Thunderbird reopens the last seen message on restart, triggering the crash again. This vulnerability affects Thunderbird < 60.5.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| Mozilla | Thunderbird | unspecified – < 60.5 | 60.5 |
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
Debian
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian 14 | thunderbird | 1:60.5.0-1 | — |
| Debian 13 | thunderbird | 1:60.5.0-1 | — |
| Debian 12 | thunderbird | 1:60.5.0-1 | — |
| Debian 9 | thunderbird | 1:60.5.1-1~deb9u1 | DSA-4392-1 |
| Debian 8 | thunderbird | 1:60.5.1-1~deb8u1 | DLA-1678-1 |
Advisories 2
- DSA-4392-1 thunderbird - security update Debian Security (DSA / DLA) · Mar 9, 2026
- DLA-1678-1 thunderbird - security update Debian Security (DSA / DLA) · Mar 9, 2026