CVE-2026-27853 — Out-of-bounds write when rewriting large DNS packets
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 c…
Published: 2026-03-31 · CVSS: 5.9 · CVSS 3.1
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.
Source: CVE Program · Revision 8b16575c39f1e1810c5e863010da073d2d3285e7