CVE-2026-48487
CVE-2026-48487: 1 tracked advisory record across Red Hat. Compare source-reported impact, fixes and remediation.
Compare the source-linked records below. Ratings and product/version details belong to each advisory; they are not a single CVE-wide score or proof that every listed product is affected. How VulniPulse collects and checks evidence.
Vendor advisory comparison
Red Hat
1 advisory- Advisory severityMedium4.3
Medium [CVE-2026-48487] Data integrity vulnerability via malformed DNS records
CVE-2026-48487Source published Source updated
Zeroconf is a pure Python implementation of multicast DNS service discovery. Prior to 0.149.16, _read_character_string and _read_string in src/zeroconf/_protocol/incoming.py advanced self.offset by attacker-declared RDLENGTH without checking it against self._data_len, allowing unauthenticated hosts on the local link over UDP/5353 (224.0.0.251 / ff02::fb) to send a TXT, HINFO, or A/AAAA record with rdlength=65535 and seed DNSCache and ServiceInfo.properties with truncated, attacker-shaped key/value or address records. This issue is fixed in version 0.149.16. An unauthenticated attacker on the local network can exploit a vulnerability in how the system processes incoming DNS records. By sending a specially crafted record with an excessive length, the attacker can cause the system's DNS…
- Affected products in this advisory
- Red Hat OpenShift Container Platform 4
- Red Hat OpenStack Platform 16.2
- Red Hat OpenStack Platform 17.1
- Red Hat OpenStack Platform 18.0
- Source-reported affected versions
- < 0.149.16
- < 224.0.0.251
- Source-reported fixed versions
- 0.149.16
- Mitigation guidance
- Upgrade to zeroconf 0.149.16 or later once packaged in the affected Red Hat product. Where upgrading isn't immediately possible, restricting the affected host's exposure to the local network segment (network segmentation or firewalling multicast DNS traffic on UDP/5353) reduces the practical attack surface, since exploitation requires local-link access.
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