CVE-2026-71402
An out-of-bounds read was found in the DHCPv4 packet capture code of wicked. ni_capture_inspect_udp_header() in src/capture.c reports the IP total length as the payload length instead of the length of the remaining UDP payload. Consequently, the DHCP option walker in the DHCPv4 client (wickedd-dhcp4) reads up to ihl + 8 bytes — at most 68 bytes — past the end of the 1500-byte packet receive buffer. An unauthenticated attacker on the same network who sends a crafted DHCP/UDP packet can make the client parse adjacent heap memory as DHCP options, so that heap contents such as allocator metadata or pointer values can be interpreted into lease fields. The over-read is bounded to 68 bytes; no memory write, no attacker control over the adjacent bytes and no remote exfiltration primitive has been demonstrated. This issue affects wicked up to and including version 0.6.80.
Scoring
- Severity
- MEDIUM
- CVSS base score
- 5.4
- CVSS vector
- CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N
- EPSS probability
- 0.17%
- CWE
- CWE-125, CWE-130
- Published
- 2026-08-27
- Last modified
- 2026-08-27
Affected products
- SUSE wicked
Weakness type
Related vulnerabilities
- CVE-2026-87875 — Cups: openprinting cups: heap out-of-bounds read in cupsutf32toutf8() via missing source-length bound
- CVE-2026-22590 — Fast-DDS Discovery Server: Out-of-Bounds Read & Heap Memory Disclosure via DATA_FRAG sampleSize / fragmentsInSubmessage
- CVE-2026-87824 — zstd-jni 1.3.3-1 through 1.5.7-13 Out-of-Bounds Read via Zstd.trainFromBufferDirect
- CVE-2026-73324 — VLC media player 3.0.0 through 3.0.23 Heap Out-of-Bounds Read via Unterminated RealRTSP Response Line
- CVE-2026-87795 — zstd-jni 1.2.0 through 1.5.7-13 Out-of-Bounds Read via ZstdDictCompress
- CVE-2026-87736 — An issue was discovered in the mirage-crypto-ec package before 2.3.0 for OCaml. There is an EC...
- CVE-2026-81646 — Out-of-bounds read vulnerability in the graphics module....
- CVE-2026-49314 — OOB write vulnerability in the rendering and composition module....