Dnsmasq: dnsmasq: tftp prefetch cache keyed on stale heap pointer serves wrong file content
Historical advisory recorded 6 Nov 2026 02:36:20 UTC. Read the latest advisory.
cve-program · CVE-2026-93006
PublishedA 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.
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cve-program · CVE-2026-93006
PublishedDnsmasq: dnsmasq: tftp prefetch cache keyed on stale heap pointer serves wrong file content
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.
- Source published
- 29 Oct 2026 12:47:23 UTC
- Source modified
- 6 Nov 2026 01:50:32 UTC
- Saved here
- 6 Nov 2026 02:36:20 UTC
- Source terms
- CVE Program Terms of Use
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CVSS 3.1 · 6.8 CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N