Medium
4.3
A flaw was found in dnsmasq. The DHCPv6 client hostname parser can read one byte past the end of...
CVE-2026-93009
First seen on SecPulse
Affected packages
| Ecosystem | Package | Affected | Fixed |
|---|---|---|---|
| Red Hat | Red Hat Ceph Storage 9 | — | — |
| Red Hat | Red Hat Enterprise Linux 10 | — | — |
| Red Hat | Red Hat Enterprise Linux 6 | — | — |
| Red Hat | Red Hat Enterprise Linux 7 | — | — |
| Red Hat | Red Hat Enterprise Linux 8 | — | — |
| Red Hat | Red Hat Enterprise Linux 9 | — | — |
| Red Hat | Red Hat OpenShift Container Platform 4 | — | — |
| Red Hat | Red Hat OpenStack Platform 13 (Queens) | — | — |
| Red Hat | Red Hat OpenStack Platform 18.0 | — | — |
Original description The description as published by the source.
A flaw was found in dnsmasq. The DHCPv6 client hostname parser can read one byte past the end of a crafted FQDN option because it checks the next label length before confirming the pointer is still inside the option. An attacker on the local network can trigger this with a single DHCPv6 packet. The extra byte is not returned to the client or logged, and no crash has been demonstrated.
Source: CVE.org (CVE Program・cvelistV5) NVD GitHub Advisory
References
- web secalert@redhat.com
- web secalert@redhat.com
- web nvd.nist.gov
- web github.com