CVE-2026-12244
8.7
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
Summary
If NSD is configured as secondary for a zone, the primary of that zone can crash NSD with an AXFR containing a DNS message with a special crafted SVCB RR with an rdata size of 65512, that let's an (uint16_t) variable that is used to allocate space needed for the RR wrap (because total size > 65535), causing a heap overflow. The attacker can perform a controlled (RCE class) head write of up to 65509 bytes
Affected Software
| Vendor | Product | Version Range | Status |
|---|---|---|---|
| NLnet Labs | NSD | 4.14.0 < 4.14.3 | affected |
Weaknesses
- CWE-190: CWE-190: Integer Overflow or Wraparound
- CWE-122: CWE-122: Heap-based Buffer Overflow
ADP Enrichment
CISA ADP Vulnrichment
- SSVC:
- Exploitation: none
- Automatable: no
- Technical Impact: total
References
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