What’s Vulnerable › Vulnerabilities

CVE-2026-93006: Dnsmasq: dnsmasq: tftp prefetch cache keyed on stale heap pointer serves wrong file content

• Severity: medium (CVSS 6.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.3% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-10-29 · updated 2026-10-30
• Weakness: CWE-672

Description

A flaw was found in dnsmasq. The TFTP server can serve the wrong file contents because a recently used transfer cache is not invalidated when a transfer finishes. An attacker on the local network who can request a TFTP file may cause a later client to receive previously cached data instead of the requested file. In PXE network-boot environments this can substitute attacker-chosen boot content for a victim machine.

Affected products

• Red Hat OpenShift Container Platform 4.18: all versions
• Red Hat Ceph Storage 9: all versions
• Red Hat Enterprise Linux 10: all versions
• Red Hat Enterprise Linux 6: all versions
• Red Hat Enterprise Linux 7: all versions
• Red Hat Enterprise Linux 8: all versions
• Red Hat Enterprise Linux 9: all versions
• Red Hat OpenShift Container Platform 5: all versions
• Red Hat OpenStack Platform 13 (Queens): all versions
• Red Hat OpenStack Platform 18.0: all versions

References

• https://access.redhat.com/security/cve/CVE-2026-93006
• https://bugzilla.redhat.com/show_bug.cgi?id=2536075

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