Description
In Alpine before 2.25, untagged responses from an IMAP server are accepted before STARTTLS.
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 | alpine | 2.25+dfsg1-1 | — |
| Debian 13 | alpine | 2.25+dfsg1-1 | — |
| Debian 12 | alpine | 2.25+dfsg1-1 | — |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu Pro 20.04 LTS | alpine | 2.22+dfsg1-1ubuntu0.1~esm1 | USN-7360-1 |
| Ubuntu Pro 18.04 LTS | alpine | 2.21+dfsg1-1ubuntu0.1~esm1 | USN-7360-1 |
| Ubuntu Pro 16.04 LTS | alpine | 2.20+dfsg1-2ubuntu0.1~esm1 | USN-7360-1 |
Alpine
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine v3.24 | alpine | 2.25-r0 | — |
| Alpine v3.23 | alpine | 2.25-r0 | — |
| Alpine v3.22 | alpine | 2.25-r0 | — |
| Alpine v3.21 | alpine | 2.25-r0 | — |
| Alpine v3.20 | alpine | 2.25-r0 | — |
Show 5 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine v3.19 | alpine | 2.25-r0 | — |
| Alpine v3.18 | alpine | 2.25-r0 | — |
| Alpine v3.17 | alpine | 2.25-r0 | — |
| Alpine v3.16 | alpine | 2.25-r0 | — |
| Alpine v3.15 | alpine | 2.25-r0 | — |
Advisories 1
- USN-7360-1 alpine vulnerabilities Ubuntu Security Notices (USN) · Jun 25, 2026