Flaw in TFTP Server of dnsmasq Affects Local Network Security
CVE-2026-93006

6.8MEDIUM

Key Information:

Vendor

Red Hat
Status
Red Hat Ceph Storage 9
Red Hat Enterprise Linux 10
Red Hat Enterprise Linux 6
Red Hat Enterprise Linux 7
Vendor
CVE Published:
29 October 2026

What is CVE-2026-93006?

A significant issue has been identified in the TFTP server functionalities of dnsmasq, where the transfer cache may not be invalidated after a file transfer is completed. This flaw allows an attacker on the local network to request a TFTP file, potentially resulting in subsequent clients receiving outdated or previously cached data instead of the intended file. In environments utilizing PXE network booting, this vulnerability poses a risk of substituting malicious boot content, leading to unauthorized access and system compromise.

References

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

CVSS V3.1

Score:
6.8
Severity:
MEDIUM
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Adjacent Network
Attack Complexity:
High
Privileges Required:
None
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

Credit

Red Hat would like to thank Shubham Raj (Causal Security) for reporting this issue.
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