CVE-2009-2958

The tftp_request function in tftp.c in dnsmasq before 2.50, when --enable-tftp is used, allows...

4.3 MediumPublic exploitFix available

The tftp_request function in tftp.c in dnsmasq before 2.50, when --enable-tftp is used, allows remote attackers to cause a denial of service (NULL pointer dereference and daemon crash) via a TFTP read (aka RRQ) request with a malformed blksize option.

Exploit likelihood

10.4%Up 8.4 points since Feb 4, 2022

What each source reports

NVD Score used 4.3

Record: CVE-2009-2958
CVSS 2.0: 4.3 MediumAV:N/AC:M/Au:N/C:N/I:N/A:P
Weakness: CWE-399
Updated: 2026-11-02

CVE List No score

Record: CVE-2009-2958
Updated: 2026-11-02

EUVDEUVD-2009-2945 No score

Record: EUVD-2009-2945
Updated: 2026-11-03

GitHub AdvisoriesGHSA-m4qp-3gf5-73rm No score

The tftp_request function in tftp.c in dnsmasq before 2.50, when --enable-tftp is used, allows...

Record: GHSA-m4qp-3gf5-73rm
Updated: 2026-11-02

OSV No score

Record: CVE-2009-2958
Updated: 2026-11-02

OSVDEBIAN-CVE-2009-2958 No score

Record: DEBIAN-CVE-2009-2958
Updated: 2026-11-02

Affected products

thekelleys dnsmasq

Affected packages

Affected packages
Package	Affected	Fixed
`dnsmasq` Debian:12	before 2.50-1	2.50-1
`dnsmasq` Debian:13	before 2.50-1	2.50-1
`dnsmasq` Debian:14	before 2.50-1	2.50-1
`dnsmasq` Debian:5.0 From an advisory covering 2 CVEs	before 2.45-1+lenny1, plus listed versions 2.45-1	2.45-1+lenny1
`dnsmasq` Red Hat:enterprise_linux:5::client From an advisory covering 2 CVEs	before 0:2.45-1.1.el5_3	0:2.45-1.1.el5_3
`dnsmasq-debuginfo` Red Hat:enterprise_linux:5::client From an advisory covering 2 CVEs	before 0:2.45-1.1.el5_3	0:2.45-1.1.el5_3
`dnsmasq` Red Hat:enterprise_linux:5::server From an advisory covering 2 CVEs	before 0:2.45-1.1.el5_3	0:2.45-1.1.el5_3
`dnsmasq-debuginfo` Red Hat:enterprise_linux:5::server From an advisory covering 2 CVEs	before 0:2.45-1.1.el5_3	0:2.45-1.1.el5_3

Public exploits

Links only. Every CVE stores no exploit code.

Public exploits
Source	Link	Date
Exploit-DB	Dnsmasq < 2.50 - Heap Overflow / Null Pointer Dereference	2009-09-09

History

History
Recorded	Changed	Sources
Nov 6, 2026	affected, facts
Nov 3, 2026	aliases	EUVD
Nov 2, 2026	first indexed	CVE List, Exploit-DB, GitHub Advisories, NVD, OSV

Dates are when Every CVE recorded each change. Upstream dates may differ.

In short

CVE-2009-2958 is a medium vulnerability (CVSS 4.3) in Thekelleys Dnsmasq, published September 1, 2009. Public exploit code exists. EPSS puts the chance of exploitation in the next 30 days at 10.4%, the 95th percentile. Fixed in dnsmasq 2.50-1.

References

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