CVE Explorer
CVE-2026-30871
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 parse_question function. The issue is triggered by PTR queries for reverse DNS domains (.in-addr.arpa and .ip6.arpa). DNS packets received on UDP port 5353 are expanded by dn_expand into an 8096-byte global buffer (name_buffer), which is then copied via an unbounded strcpy into a fixed 256-byte stack buffer when
Known exploited
Not asserted
Disputed
No
Stale source
No
Conflicts
0
Affected products and versions
1 source assertion{"product":"openwrt","vendor":"openwrt","versions":[{"status":"affected","version":"< 24.10.6"},{"status":"affected","version":">= 25.12.0-rc1, < 25.12.1"}]}
- cve_program_cvelist_v5affectedurn:baitaphish:normalized-source-record:v2:1a8a895a2e39abace2c63584dd40804c807e75ad7c24c73f04b05e9e9a1fee31 · sha256:3dfcda3fc1a4111d… · /containers/cna/affected/0
Provider-owned CVSS observations
1 source assertion{"metric":{"attackComplexity":"HIGH","attackRequirements":"NONE","attackVector":"NETWORK","baseScore":9.5,"baseSeverity":"CRITICAL","privilegesRequired":"NONE","subAvailabilityImpact":"HIGH","subConfidentialityImpact":"HIGH","subIntegrityImpact":"HIGH","userInteraction":"NONE","vectorString":"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","version":"4.0","vulnAvailabilityImpact":"HIGH","vulnConfidentialityImpact":"HIGH","vulnIntegrityImpact":"HIGH"},"metric_type":"cvssV4_0"}
- cve_program_cvelist_v5cvssurn:baitaphish:normalized-source-record:v2:1a8a895a2e39abace2c63584dd40804c807e75ad7c24c73f04b05e9e9a1fee31 · sha256:3dfcda3fc1a4111d… · /containers/cna/metrics/0/cvssV4_0
CWE assertions
1 source assertion{"cweId":"CWE-121","description":"CWE-121: Stack-based Buffer Overflow","lang":"en","type":"CWE"}
- cve_program_cvelist_v5cweurn:baitaphish:normalized-source-record:v2:1a8a895a2e39abace2c63584dd40804c807e75ad7c24c73f04b05e9e9a1fee31 · sha256:3dfcda3fc1a4111d… · /containers/cna/problemTypes/0/descriptions/0
Source references
3 source assertions{"name":"https://github.com/openwrt/openwrt/releases/tag/v24.10.6","tags":["x_refsource_MISC"],"url":"https://github.com/openwrt/openwrt/releases/tag/v24.10.6"}
- cve_program_cvelist_v5referenceurn:baitaphish:normalized-source-record:v2:1a8a895a2e39abace2c63584dd40804c807e75ad7c24c73f04b05e9e9a1fee31 · sha256:3dfcda3fc1a4111d… · /containers/cna/references/1
{"name":"https://github.com/openwrt/openwrt/releases/tag/v25.12.1","tags":["x_refsource_MISC"],"url":"https://github.com/openwrt/openwrt/releases/tag/v25.12.1"}
- cve_program_cvelist_v5referenceurn:baitaphish:normalized-source-record:v2:1a8a895a2e39abace2c63584dd40804c807e75ad7c24c73f04b05e9e9a1fee31 · sha256:3dfcda3fc1a4111d… · /containers/cna/references/2
{"name":"https://github.com/openwrt/openwrt/security/advisories/GHSA-7c3j-f7w2-p8f6","tags":["x_refsource_CONFIRM"],"url":"https://github.com/openwrt/openwrt/security/advisories/GHSA-7c3j-f7w2-p8f6"}
- cve_program_cvelist_v5referenceurn:baitaphish:normalized-source-record:v2:1a8a895a2e39abace2c63584dd40804c807e75ad7c24c73f04b05e9e9a1fee31 · sha256:3dfcda3fc1a4111d… · /containers/cna/references/0
Attribution and limitations
- CVE Program CVEList V5: Reproduce the MITRE copyright designation and CVE license in copies. Source →
Provider severity values are preserved separately. Baitaphish does not convert them into a risk rating, infer affected products, or treat EPSS as observed exploitation.