CVE catalog
CVE-2025-62408
c-ares: CVE-2025-62408
- Severity
- Medium · CVSS 5.9
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H - Published
- Source
- [NVD] · [CVE record]
- EPSS
- 0.43% · Oct 25, 2026
c-ares is an asynchronous resolver library. Versions 1.32.3 through 1.34.5 terminate a query after maximum attempts when using read_answer() and process_answer(), which can cause a Denial of Service. This issue is fixed in version 1.34.6.
Vulnerable and fixed packages
Distribution-reported package versions and fixes. These do not depend on matching against the OpenFactory package catalog.
| Distribution | Package | Release | Version | Status |
|---|---|---|---|---|
| Debian | c-ares | sid | 1.34.9-1 | fixed |
| Debian | c-ares | forky | 1.34.8-1 | fixed |
| Debian | c-ares | trixie | 1.34.5-1+deb13u1 | fixed |
| Debian | c-ares | trixie-security | 1.34.5-1+deb13u1 | fixed |
| Debian | c-ares | bookworm | 1.18.1-3 | not affected |
| Cpe | c-ares | Not reported | 1.34.6 | fixed |
| Alpine | c-ares | 3.21 | 1.34.6-r0 | fixed |
| Alpine | c-ares | 3.22 | 1.34.6-r0 | fixed |
| Alpine | c-ares | 3.23 | 1.34.6-r0 | fixed |
| Alpine | c-ares | 3.24 | 1.34.6-r0 | fixed |
| Ubuntu | c-ares | 25.10 | 1.34.4-2.1 | vulnerable |
| Ubuntu | c-ares | 25.10 | 1.34.5-1 | vulnerable |
| Ubuntu | c-ares | 25.10 | 1.34.5-1ubuntu0.1 | fixed |
| Ubuntu | c-ares | 25.10 | 1.34.4-2.1 | vulnerable |
| Ubuntu | c-ares | 25.10 | 1.34.5-1 | vulnerable |
| Ubuntu | c-ares | 25.10 | 1.34.5-1ubuntu0.1 | fixed |
| Opensuse | istioctl | tumbleweed | 1.28.2-1.1 | fixed |
| Opensuse | c-ares | tumbleweed | 1.34.6-1.1 | fixed |
Fixed-version evidence
| Distribution | Package | Type | Release | Fixed version | Urgency | Origin | Bugs |
|---|---|---|---|---|---|---|---|
| Debian | c-ares | source | sid | 1.34.6-1 | not yet assigned | Not reported | Not reported |
| Debian | c-ares | source | forky | 1.34.6-1 | not yet assigned | Not reported | Not reported |
| Debian | c-ares | source | trixie | 1.34.5-1+deb13u1 | not yet assigned | Not reported | Not reported |
| Debian | c-ares | source | bookworm | Not affected | unimportant | Not reported | Not reported |
| Cpe | c-ares | cpe | Not reported | 1.34.6 | Not reported | NVD-CVE-2025-62408 | Not reported |
| Alpine | c-ares | apk | 3.21 | 1.34.6-r0 | Not reported | ALPINE-CVE-2025-62408 | Not reported |
| Alpine | c-ares | apk | 3.22 | 1.34.6-r0 | Not reported | ALPINE-CVE-2025-62408 | Not reported |
| Alpine | c-ares | apk | 3.23 | 1.34.6-r0 | Not reported | ALPINE-CVE-2025-62408 | Not reported |
| Alpine | c-ares | apk | 3.24 | 1.34.6-r0 | Not reported | ALPINE-CVE-2025-62408 | Not reported |
| Ubuntu | c-ares | deb | 25.10 | 1.34.5-1ubuntu0.1 | Not reported | UBUNTU-CVE-2025-62408 | Not reported |
| Ubuntu | c-ares | deb | 25.10 | 1.34.5-1ubuntu0.1 | Not reported | USN-7925-1 | Not reported |
| Opensuse | istioctl | rpm | tumbleweed | 1.28.2-1.1 | Not reported | OPENSUSE-SU-2026:10029-1 | Not reported |
| Opensuse | c-ares | rpm | tumbleweed | 1.34.6-1.1 | Not reported | OPENSUSE-SU-2026:10007-1 | Not reported |
OpenFactory catalog packages
[openSUSE Tumbleweed]
- [c-ares-devel]Unknown
Source package: [c-ares]
Details (1)
1.34.8-1.1· x86_64 · tumbleweedUnknown · Fixed:
1.34.6-1.1Version impact unknown
dsa · c-ares · opensuse · tumbleweed
- [c-ares-utils]Unknown
Source package: [c-ares]
Details (1)
1.34.8-1.1· x86_64 · tumbleweedUnknown · Fixed:
1.34.6-1.1Version impact unknown
dsa · c-ares · opensuse · tumbleweed
- [istioctl-bash-completion]Unknown
Source package: [istioctl]
Details (1)
1.30.4-1.1· noarch · tumbleweedUnknown · Fixed:
1.28.2-1.1Version impact unknown
dsa · istioctl · opensuse · tumbleweed
- [istioctl-zsh-completion]Unknown
Source package: [istioctl]
Details (1)
1.30.4-1.1· noarch · tumbleweedUnknown · Fixed:
1.28.2-1.1Version impact unknown
dsa · istioctl · opensuse · tumbleweed
- [libcares2]Unknown
Source package: [c-ares]
Details (1)
1.34.8-1.1· x86_64 · tumbleweedUnknown · Fixed:
1.34.6-1.1Version impact unknown
dsa · c-ares · opensuse · tumbleweed
- [libcares2-32bit]Unknown
Source package: [c-ares]
Details (1)
1.34.8-1.1· x86_64 · tumbleweedUnknown · Fixed:
1.34.6-1.1Version impact unknown
dsa · c-ares · opensuse · tumbleweed
- [istioctl]Fixed
Source package: [istioctl]
Details (1)
1.30.4-1.1· x86_64 · tumbleweedFixed · Fixed:
1.28.2-1.1dsa · istioctl · opensuse · tumbleweed
[Debian 12 (Bookworm)]
- [libc-ares2]Not affected
Source package: [c-ares]
Details (2)
1.18.1-3· amd64 · bookwormNot affected
dsa · c-ares · debian · bookworm
1.18.1-3· arm64 · bookwormNot affected
dsa · c-ares · debian · bookworm
- [libc-ares-dev]Not affected
Source package: [c-ares]
Details (2)
1.18.1-3· amd64 · bookwormNot affected
dsa · c-ares · debian · bookworm
1.18.1-3· arm64 · bookwormNot affected
dsa · c-ares · debian · bookworm
[Debian 13 (Trixie)]
- [libc-ares2]Fixed
Source package: [c-ares]
Details (4)
1.34.5-1+deb13u1· all · trixieFixed · Fixed:
1.34.5-1+deb13u1dsa · c-ares · debian · 13
1.34.5-1+deb13u1· all · trixieFixed · Fixed:
1.34.5-1+deb13u1dsa · c-ares · debian · 13
1.34.5-1+deb13u1· all · trixie-securityFixed · Fixed:
1.34.5-1+deb13u1dsa · c-ares · debian · 13
1.34.5-1+deb13u1· all · trixie-securityFixed · Fixed:
1.34.5-1+deb13u1dsa · c-ares · debian · 13
- [libcares2]Fixed
Source package: [c-ares]
Details (4)
1.34.5-1+deb13u1· amd64 · trixieFixed · Fixed:
1.34.5-1+deb13u1dsa · c-ares · debian · 13
1.34.5-1+deb13u1· arm64 · trixieFixed · Fixed:
1.34.5-1+deb13u1dsa · c-ares · debian · 13
1.34.5-1+deb13u1· amd64 · trixie-securityFixed · Fixed:
1.34.5-1+deb13u1dsa · c-ares · debian · 13
1.34.5-1+deb13u1· arm64 · trixie-securityFixed · Fixed:
1.34.5-1+deb13u1dsa · c-ares · debian · 13
- [libc-ares-dev]Fixed
Source package: [c-ares]
Details (4)
1.34.5-1+deb13u1· amd64 · trixieFixed · Fixed:
1.34.5-1+deb13u1dsa · c-ares · debian · 13
1.34.5-1+deb13u1· arm64 · trixieFixed · Fixed:
1.34.5-1+deb13u1dsa · c-ares · debian · 13
1.34.5-1+deb13u1· amd64 · trixie-securityFixed · Fixed:
1.34.5-1+deb13u1dsa · c-ares · debian · 13
1.34.5-1+deb13u1· arm64 · trixie-securityFixed · Fixed:
1.34.5-1+deb13u1dsa · c-ares · debian · 13
Observed:
References
- [https://ftp.suse.com/pub/projects/security/csaf/suse-su-2026_23364-1.json]
- [https://nvd.nist.gov/vuln/detail/CVE-2025-62408]
- [https://osv.dev/vulnerability/ALPINE-CVE-2025-62408]
- [https://osv.dev/vulnerability/DSA-6084-1]
- [https://osv.dev/vulnerability/UBUNTU-CVE-2025-62408]
- [https://osv.dev/vulnerability/USN-7925-1]
- [https://osv.dev/vulnerability/openSUSE-SU-2026:10007-1]
- [https://osv.dev/vulnerability/openSUSE-SU-2026:10029-1]
- [https://security-tracker.debian.org/tracker/CVE-2025-62408]
- [https://security.access.redhat.com/data/csaf/v2/vex/2025/cve-2025-62408.json]
- [https://wid.cert-bund.de/.well-known/csaf/white/2025/wid-sec-w-2025-2922.json]
[CERT-Bund public advisories] · [Debian Security Tracker] · [FIRST EPSS] · [National Vulnerability Database (NVD)] · [OSV Package Vulnerability Database] · [Red Hat security advisories and VEX] · [SUSE security advisories and VEX]