Bug 2501840 (CVE-2026-48487) - CVE-2026-48487 zeroconf: Zeroconf: Data integrity vulnerability via malformed DNS records
Summary: CVE-2026-48487 zeroconf: Zeroconf: Data integrity vulnerability via malformed...
Keywords:
Status: NEW
Alias: CVE-2026-48487
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
medium
medium
Target Milestone: ---
Assignee: Product Security
QA Contact:
URL:
Whiteboard:
Depends On: 2508073
Blocks:
TreeView+ depends on / blocked
 
Reported: 2026-07-17 19:01 UTC by OSIDB Bzimport
Modified: 2026-07-28 17:35 UTC (History)
7 users (show)

Fixed In Version:
Clone Of:
Environment:
Last Closed:
Embargoed:

Attachments (Terms of Use)

Description OSIDB Bzimport 2026-07-17 19:01:43 UTC 
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.
Note You need to log in before you can comment on or make changes to this bug.