Service crash via Lua DNS overlay over-read
Published Mar 31, 2026 · Updated Mar 31, 2026
Out-of-bounds reads in PowerDNS DNSdist 1.9.0 through 1.9.11 and 2.0.0 through 2.0.2 allow remote attackers to crash the service. The DNS overlay parser performs an invalid substring operation while newDNSPacketOverlay walks a crafted response, reading beyond the packet buffer. Reachability requires custom Lua code to pass attacker-controlled DNS responses to that function; the read can crash the process or expose unrelated memory.
Summary
What happened
Out-of-bounds reads in PowerDNS DNSdist 1.9.0 through 1.9.11 and 2.0.0 through 2.0.2 allow remote attackers to crash the service. The DNS overlay parser performs an invalid substring operation while newDNSPacketOverlay walks a crafted response, reading beyond the packet buffer. Reachability requires custom Lua code to pass attacker-controlled DNS responses to that function; the read can crash the process or expose unrelated memory.
The record
- CVE
- CVE-2026-24028
- Published
- Mar 31, 2026
- Updated
- Mar 31, 2026
- Vendor
- PowerDNS
- Product
- DNSdist
- Classifications
- CWE-126, T1499
- Attack vector
- network
- Privileges
- unauthenticated
Timeline
How it unfolded
- Mar 31, 2026CVE publishedPublication date reported by the CVE source.
- Mar 31, 2026Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
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Is a vulnerable build present?
Compare these published version ranges with your installed build and any vendor patches.
- Affected versionversion=1.9.0 <1.9.12
- Affected versionversion=2.0.0 <2.0.3
What conditions does exploitation require?
What is affected?
Published CVSS scores
CVSS describes severity. EPSS estimates exploitation probability.
Attacks
What attackers are doing with it
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Public exploit references
No public exploit references are available in this record.
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Technologies
Your stack
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Your stack
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