CVE-2026-30872

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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
2026-03-19T21:56:23.472Z
Modified
2026-04-10T05:41:57.471872Z
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 matchipv6addresses 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 namebuffer 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 (INET6ADDRSTRLEN). 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 matchipv6addresses, potentially enabling remote code execution. This issue has been fixed in versions 24.10.6 and 25.12.1.

Database specific 
{
    "cwe_ids": [
        "CWE-121"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/30xxx/CVE-2026-30872.json",
    "cna_assigner": "GitHub_M"
}
References

Affected packages

Git / github.com/openwrt/openwrt

Affected ranges

Type
GIT
Repo
https://github.com/openwrt/openwrt
Events
Introduced
b1a74b1cde0dd9b4c07bb5ba7020f94967912f2d
Fixed
d6115e42127481645ae7210c9d8ca1bd14313473
Database specific 
{
    "versions": [
        {
            "introduced": "25.12.0-rc1"
        },
        {
            "fixed": "25.12.1"
        }
    ]
}
Type
GIT
Repo
https://github.com/openwrt/openwrt
Events
Introduced
0 Unknown introduced commit / All previous commits are affected
Fixed
ec8eeaa8fbd3122b9b9e68b7db02707884a19c9c
Database specific 
{
    "versions": [
        {
            "introduced": "0"
        },
        {
            "fixed": "24.10.6"
        }
    ]
}

Affected versions

Other
reboot
v24.*
v24.10.0
v24.10.0-rc1
v24.10.0-rc2
v24.10.0-rc3
v24.10.0-rc4
v24.10.0-rc5
v24.10.0-rc6
v24.10.0-rc7
v24.10.1
v24.10.2
v24.10.3
v24.10.4
v24.10.5
v25.*
v25.12.0
v25.12.0-rc1
v25.12.0-rc2
v25.12.0-rc3
v25.12.0-rc4
v25.12.0-rc5

Database specific

source 
"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-30872.json"