CVE-2026-93006
Dnsmasq: dnsmasq: tftp prefetch cache keyed on stale heap pointer serves wrong file content
- State
- Published
- Severity
- 6.8 Medium
- Published
- Oct 29, 2026
- Updated
- Oct 30, 2026
- Reserved
- Sep 17, 2026
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.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 3.1 | 6.8 Medium | CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N | redhat |
Weaknesses
- CWE-672 Operation on a Resource after Expiration or Release
Affected Products
| Product | Versions |
|---|---|
Red Hat Ceph Storage 9Red Hat | |
Red Hat Enterprise Linux 10Red Hat | |
Red Hat Enterprise Linux 6Red Hat | |
Red Hat Enterprise Linux 7Red Hat | |
Red Hat Enterprise Linux 8Red Hat | |
Red Hat Enterprise Linux 9Red Hat | |
Red Hat OpenShift Container Platform 4Red Hat | |
Red Hat OpenShift Container Platform 4Red Hat | |
Red Hat OpenShift Container Platform 4Red Hat | |
Red Hat OpenShift Container Platform 4Red Hat | |
Red Hat OpenShift Container Platform 5Red Hat | |
Red Hat OpenShift Container Platform 5Red Hat | |
Red Hat OpenStack Platform 13 (Queens)Red Hat | |
Red Hat OpenStack Platform 18.0Red Hat |
References
- https://access.redhat.com/security/cve/CVE-2026-93006vdb-entry
- RHBZ#2536075issue-tracking
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