Medium severity5.9NVD Advisory· Published Mar 31, 2026· Updated Jul 25, 2026

CVE-2026-27853

Description

An attacker might be able to trigger an out-of-bounds write by sending crafted DNS responses to a DNSdist using the DNSQuestion:changeName or DNSResponse:changeName methods in custom Lua code. In some cases the rewritten packet might become larger than the initial response and even exceed 65535 bytes, potentially leading to a crash resulting in denial of service.

AI Insight

LLM-synthesized narrative grounded in this CVE's description and references.

Affected products

PowerDNS/Dnsdist2 versions
cpe:2.3:a:powerdns:dnsdist:*:*:*:*:*:*:*:*+ 1 more
- cpe:2.3:a:powerdns:dnsdist:*:*:*:*:*:*:*:*range: >=1.9.0,<1.9.12
- (no CPE)
osv-coords2 versions
pkg:rpm/opensuse/dnsdist&distro=openSUSE%20Leap%2016.0 pkg:rpm/suse/dnsdist&distro=SUSE%20Linux%20Enterprise%20Module%20for%20Basesystem%2015%20SP7
< 1.9.13-160000.1.1+ 1 more
- (no CPE)range: < 1.9.13-160000.1.1
- (no CPE)range: < 1.9.12-150700.3.9.1

Patches

Vulnerability mechanics

References

www.dnsdist.org/security-advisories/powerdns-advisory-for-dnsdist-2026-02.htmlnvdVendor Advisory

News mentions

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cvss	0.384
epss	0.000
exploit	0.000
kev	0.000
patch	0.000
ransomware	0.000