VDB
CVE-2026-33602
CVE-2026-33602
PUBLISHED
CVSS 6.5 MEDIUM
Off-by-one access when processing crafted UDP responses
Reported by ox · Published April 22, 2026
A rogue backend can send a crafted UDP response with a query ID off by one related to the maximum configured value, triggering an out-of-bounds write leading to a denial of service.
Fixed versions
Upgrade to a fixed version or later. Language registries are listed first, then Linux distributions, then vendor products.
| Package | Ecosystem | Fixed in |
|---|---|---|
| dnsdist | repo.powerdns.com | 2.0.4, 1.9.13 |
| dnsdist | Alpine | 2.0.4-r0 |
| dnsdist | powerdns | 2.0.4, 1.9.13 |
Risk scores
CVSS 3.1
6.5
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:H
Affected products
| Vendor | Product | Versions |
|---|---|---|
| PowerDNS | DNSdist | 1.9.0, 2.0.0 |
| PowerDNS | DNSdist | 1.9.0, 2.0.0 |
| alpine | dnsdist | 0 |
Timeline
- Apr 21, 2026 CVE Published
- Apr 22, 2026 CVE Updated
- Apr 23, 2026 Security Advisory (2 in total, the first dated here)
- May 18, 2026 EPSS Score (30 in total, the first dated here)
- Jul 16, 2026 Coalition ESS Score
Query this with the API
The same record, from the CLI:
vulnetix vdb vuln CVE-2026-33602
vulnetix vdb fixes CVE-2026-33602Or with curl, using the org id and key from your account page:
curl -s -H "Authorization: ApiKey ${VULNETIX_ORG_ID}:${VULNETIX_API_KEY}" \
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