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Vulnerability record/PUBLISHED/Published Oct 29, 2026 12:47:23 UTC

CVE-2026-93006

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.

Base score6.8/ 10
SeverityMediumCVSS 3.1

Exploitability / impact

CVSS metric breakdown

Vector-derived attributes
Base severityMedium
Attack vectorAdjacentAV
Attack complexityHighAC
Privileges requiredNonePR
User interactionNoneUI
ScopeUnchangedS
Confidentiality impactHighC
Integrity impactHighI
Availability impactNoneA
CVSS vector stringCVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N

CVSS communicates standardized severity and impact characteristics. It does not establish whether a system is exploitable in your specific environment.

Record context

CVE Numbering Authorityredhat
Last updatedNov 6, 2026 01:50:32 UTC
PublishedOct 29, 2026 12:47:23 UTC
ReservedSep 17, 2026 14:35:34 UTC

Credits

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