CVE-2026-30872
- Source
- https://cve.org/CVERecord?id=CVE-2026-30872
- Import Source
- https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-30872.json
- JSON Data
- https://api.osv.dev/v1/vulns/CVE-2026-30872
- Aliases
-
- GHSA-mpgh-v658-jqv5
- Published
- 2026-03-19T21:56:23Z
- Modified
- 2026-08-12T03:51:13Z
- Severity
-
- 9.5 (Critical) CVSS_V4 - CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H CVSS Calculator
- Summary
- OpenWrt Project has a Stack-based Buffer Overflow vulnerability via IPv6 reverse DNS lookup
- Details
-
OpenWrt Project is a Linux operating system targeting embedded devices. In versions prior to 24.10.6 and 25.12.1, the mdns daemon has a Stack-based Buffer Overflow vulnerability in the match_ipv6_addresses function, triggered when processing PTR queries for IPv6 reverse DNS domains (.ip6.arpa) received via multicast DNS on UDP port 5353. During processing, the domain name from name_buffer is copied via strcpy into a fixed 256-byte stack buffer, and then the reverse IPv6 request is extracted into a buffer of only 46 bytes (INET6_ADDRSTRLEN). Because the length of the data is never validated before this extraction, an attacker can supply input larger than 46 bytes, causing an out-of-bounds write. This allows a specially crafted DNS query to overflow the stack buffer in match_ipv6_addresses, potentially enabling remote code execution. This issue has been fixed in versions 24.10.6 and 25.12.1.
- Database specific
{ "cna_assigner": "GitHub_M", "cwe_ids": [ "CWE-121" ], "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/30xxx/CVE-2026-30872.json" }- References
-
- https://github.com/openwrt/openwrt/releases/tag/v24.10.6
- https://github.com/openwrt/openwrt/releases/tag/v25.12.1
- https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/30xxx/CVE-2026-30872.json
- https://github.com/openwrt/openwrt/security/advisories/GHSA-mpgh-v658-jqv5
- https://nvd.nist.gov/vuln/detail/CVE-2026-30872
Affected packages
Git / github.com/openwrt/openwrt
Affected ranges
- Type
- GIT
- Repo
- https://github.com/openwrt/openwrt
- Events
-
IntroducedFixedIntroduced0 Unknown introduced commit / All previous commits are affectedFixed
- Database specific
-
Show details
{ "extracted_events": [ { "introduced": "25.12.0-rc1" }, { "fixed": "25.12.1" }, { "introduced": "0" }, { "fixed": "24.10.6" } ], "source": "AFFECTED_FIELD" }