CVE-2026-93006
Dnsmasq: 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.
Attack profile
How easy it is to exploit
- Attack vector
- Adjacent network
- Complexity
- High
- Privileges needed
- None
- User interaction
- None
What an attacker can affect
- Confidentiality
- High
- Integrity
- High
- Availability
- None
Exploit likelihood
What each source reports
CVE List Score used
6.8
Dnsmasq: 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.
- Record
CVE-2026-93006- CVSS 3.1
- 6.8 Medium
CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N - Weakness
- CWE-672
- Updated
- 2026-11-06
EUVDEUVD-2026-112791
6.8
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.
- Record
EUVD-2026-112791- CVSS 3.1
- 6.8 Medium
CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N - Updated
- 2026-11-06
GitHub AdvisoriesGHSA-fp59-6rfj-9jgw
6.8
A flaw was found in dnsmasq. The TFTP server can serve the wrong file contents because a recently...
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.
- Record
GHSA-fp59-6rfj-9jgw- CVSS 3.1
- 6.8 Medium
CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N - Weakness
- CWE-672
- Updated
- 2026-11-02
NVD
6.8
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.
- Record
CVE-2026-93006- CVSS 3.1
- 6.8 Medium
CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N - Weakness
- CWE-672
- Updated
- 2026-11-06
OSVDEBIAN-CVE-2026-93006
6.8
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.
- Record
DEBIAN-CVE-2026-93006- CVSS 3.1
- 6.8 Medium
CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N - Updated
- 2026-11-07
OSVUBUNTU-CVE-2026-93006
6.8
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.
- Record
UBUNTU-CVE-2026-93006- CVSS 3.1
- 6.8 Medium
CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N - Updated
- 2026-11-05
OSVAZL-112415 No score
CVE-2026-93006 affecting package dnsmasq 2.93-1
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.
- Record
AZL-112415- Updated
- 2026-11-05
OSVopenSUSE-SU-2026:12415-1 No score
dnsmasq-2.93-3.1 on GA media
These are all security issues fixed in the dnsmasq-2.93-3.1 package on the GA media of openSUSE Tumbleweed.
- Record
openSUSE-SU-2026:12415-1- Updated
- 2026-11-05
Affected products
Affected packages
| Package | Affected | Fixed |
|---|---|---|
dnsmasqAzure Linux:3 |
through 2.93-1 | None known |
dnsmasqDebian:12 |
All versions, plus listed versions 2.89-12.90-12.90-22.90-32.90-4 Show 20 moreShow less2.90-4~deb12u12.90-4~deb12u22.90-52.90-62.90-72.91-12.91~test6-12.91~test9-12.92-12.92-1+exp12.92-1~exp12.92-22.92-32.92-42.92-52.92~rc1-12.92~rc3-12.93-12.93-22.93-3 |
None known |
dnsmasqDebian:14 |
All versions, plus listed versions 2.91-12.92-12.92-1+exp12.92-1~exp12.92-2 Show 8 moreShow less2.92-32.92-42.92-52.92~rc1-12.92~rc3-12.93-12.93-22.93-3 |
None known |
dnsmasqUbuntu:Pro:14.04:LTS |
All versions, plus listed versions 2.66-4ubuntu12.67-12.68-12.68-1ubuntu0.12.68-1ubuntu0.2 Show 5 moreShow less2.68-1ubuntu0.2+esm12.68-1ubuntu0.2+esm22.68-1ubuntu0.2+esm32.68-1ubuntu0.2+esm52.68-1ubuntu0.2+esm6 |
None known |
dnsmasqUbuntu:Pro:16.04:LTS |
All versions, plus listed versions 2.75-12.75-1ubuntu0.16.04.12.75-1ubuntu0.16.04.22.75-1ubuntu0.16.04.32.75-1ubuntu0.16.04.4 Show 10 moreShow less2.75-1ubuntu0.16.04.52.75-1ubuntu0.16.04.72.75-1ubuntu0.16.04.82.75-1ubuntu0.16.04.102.75-1ubuntu0.16.04.10+esm12.79-1ubuntu0.16.04.1+esm12.79-1ubuntu0.16.04.1+esm22.90-0ubuntu0.16.04.1+esm12.90-0ubuntu0.16.04.1+esm32.90-0ubuntu0.16.04.1+esm4 |
None known |
dnsmasqUbuntu:Pro:18.04:LTS |
All versions, plus listed versions 2.78-12.78-32.79-12.79-1ubuntu0.22.79-1ubuntu0.3 Show 7 moreShow less2.79-1ubuntu0.42.79-1ubuntu0.52.79-1ubuntu0.62.79-1ubuntu0.72.90-0ubuntu0.18.04.1+esm12.90-0ubuntu0.18.04.1+esm32.90-0ubuntu0.18.04.1+esm4 |
None known |
dnsmasqUbuntu:Pro:20.04:LTS |
All versions, plus listed versions 2.80-1ubuntu22.80-1ubuntu42.80-1.1ubuntu12.80-1.1ubuntu1.22.80-1.1ubuntu1.3 Show 7 moreShow less2.80-1.1ubuntu1.42.80-1.1ubuntu1.52.80-1.1ubuntu1.62.80-1.1ubuntu1.72.90-0ubuntu0.20.04.12.90-0ubuntu0.20.04.1+esm22.90-0ubuntu0.20.04.1+esm3 |
None known |
dnsmasqUbuntu:22.04:LTS |
All versions, plus listed versions 2.85-1ubuntu22.86-1.12.86-1.1ubuntu0.12.86-1.1ubuntu0.22.86-1.1ubuntu0.3 Show 7 moreShow less2.86-1.1ubuntu0.42.86-1.1ubuntu0.52.90-0ubuntu0.22.04.12.90-0ubuntu0.22.04.32.90-0ubuntu0.22.04.42.91-0ubuntu0.22.04.12.91-0ubuntu0.22.04.2 |
None known |
dnsmasqUbuntu:24.04:LTS |
All versions, plus listed versions 2.89-12.90-22.90-2build12.90-2build22.90-2ubuntu0.1 Show 4 moreShow less2.90-2ubuntu0.32.90-2ubuntu0.42.91-0ubuntu0.24.04.12.91-0ubuntu0.24.04.2 |
None known |
dnsmasqUbuntu:26.10 |
All versions, plus listed versions 2.92-12.93-12.93-3ubuntu1 |
None known |
dnsmasqUbuntu:26.04:LTS |
All versions, plus listed versions 2.91-1build12.92~rc3-12.92-12.92-1ubuntu0.22.92-1ubuntu0.32.92-1ubuntu0.42.92-1ubuntu0.5 |
None known |
dnsmasqopenSUSE:Tumbleweed From an advisory covering 5 CVEs |
before 2.93-3.1 | 2.93-3.1 |
History
| Recorded | Changed | Sources |
|---|---|---|
| affected | OSV | |
| affected, facts | CVE List, EUVD, NVD | |
| affected, aliases, facts, references | OSV | |
| facts | CVE List, EUVD, NVD, OSV | |
| first indexed | CVE List, EUVD, GitHub Advisories, NVD, OSV |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2026-93006 is a medium vulnerability (CVSS 6.8) in Red Hat Ceph Storage 9, published October 29, 2026. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.30%, the 23rd percentile. No source names a fixed version.