Dnsmasq: dnsmasq: tftp prefetch cache keyed on stale heap pointer serves wrong file content
Historical advisory recorded 30 Oct 2026 02:48:55 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.
Read the publisher's advisoryAffected versions, risk and source history
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
- 30 Oct 2026 01:16:56 UTC
- Saved here
- 30 Oct 2026 02:48:55 UTC
- Source terms
- CVE Program Terms of Use
Original source record · Cite this exact observation · Complete original publisher JSON
Source: cve-program · CVE Program Terms of Use. The publisher's wording is preserved. ChangeIntel groups the information and labels changes. The JSON record includes additional source fields.
CVSS 3.1 · 6.8 CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N