ALPINE-CVE-2026-33630
ALPINE-CVE-2026-33630
This page contains facts from public vulnerability sources. Check the original advisory before updating.
c-ares is an asynchronous resolver library. From ver 1.32.3 until 1.34.7, a use-after-free / double-free in c-ares' query-completion handling. The same flaw — a query's callback being invoked while the query is still linked in the channel's internal lookup structures — is present at multiple points in the resend/finish path (timeout handling, response handling, and query dispatch). If the query, or for ares_getaddrinfo() the owning host_query, is freed as a side effect of that callback, it is then accessed and/or freed a second time. This vulnerability is fixed in ver 1.34.7.
CVSS 7.5 · High · Fix available
- Published
- Updated
Stack: system
Affected products and versions
c-ares Alpine:v3.21
- Affected ranges
- ECOSYSTEM: < 1.34.8-r0
Update to 1.34.8-r0
c-ares Alpine:v3.22
- Affected ranges
- ECOSYSTEM: < 1.34.8-r0
Update to 1.34.8-r0
c-ares Alpine:v3.23
- Affected ranges
- ECOSYSTEM: < 1.34.8-r0
Update to 1.34.8-r0
c-ares Alpine:v3.24
- Affected ranges
- ECOSYSTEM: < 1.34.8-r0
Update to 1.34.8-r0