CVE-2023-32726

Possible buffer overread from reading DNS responses

3.9 LowFix available

The vulnerability is caused by improper check for check if RDLENGTH does not overflow the buffer in response from DNS server.

Attack profile

How easy it is to exploit

Attack vector: Network
Complexity: High
Privileges needed: High
User interaction: Required

What an attacker can affect

Confidentiality: Low
Integrity: Low
Availability: Low

Exploit likelihood

0.67%Up 0.6 points since Dec 19, 2023

What each source reports

CVE List Score used 3.9

Possible buffer overread from reading DNS responses

The vulnerability is caused by improper check for check if RDLENGTH does not overflow the buffer in response from DNS server.

Record: CVE-2023-32726
CVSS 3.1: 3.9 LowCVSS:3.1/AV:N/AC:H/PR:H/UI:R/S:U/C:L/I:L/A:L
Weakness: CWE-754
Updated: 2026-11-02

EUVDEUVD-2023-36953 3.9

The vulnerability is caused by improper check for check if RDLENGTH does not overflow the buffer in response from DNS server.

Record: EUVD-2023-36953
CVSS 3.1: 3.9 LowCVSS:3.1/AV:N/AC:H/PR:H/UI:R/S:U/C:L/I:L/A:L
Updated: 2026-11-02

GitHub AdvisoriesGHSA-fqr7-2x83-wf2r 8.1

The vulnerability is caused by improper check for check if RDLENGTH does not overflow the buffer...

The vulnerability is caused by improper check for check if RDLENGTH does not overflow the buffer in response from DNS server.

Record: GHSA-fqr7-2x83-wf2r
CVSS 3.1: 8.1 HighCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
Weakness: CWE-754
Updated: 2026-11-02

NVD 3.9

The vulnerability is caused by improper check for check if RDLENGTH does not overflow the buffer in response from DNS server.

Record: CVE-2023-32726
CVSS 3.1: 3.9 LowCVSS:3.1/AV:N/AC:H/PR:H/UI:R/S:U/C:L/I:L/A:L
CVSS 3.1: 8.1 HighCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
Weakness: CWE-754
Updated: 2026-11-02

OSV 8.1

The vulnerability is caused by improper check for check if RDLENGTH does not overflow the buffer in response from DNS server.

Record: CVE-2023-32726
CVSS 3.1: 8.1 HighCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
Updated: 2026-11-02

OSVDEBIAN-CVE-2023-32726 8.1

The vulnerability is caused by improper check for check if RDLENGTH does not overflow the buffer in response from DNS server.

Record: DEBIAN-CVE-2023-32726
CVSS 3.1: 8.1 HighCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
Updated: 2026-11-02

OSVUBUNTU-CVE-2023-32726 3.9

The vulnerability is caused by improper check for check if RDLENGTH does not overflow the buffer in response from DNS server.

Record: UBUNTU-CVE-2023-32726
CVSS 3.1: 3.9 LowCVSS:3.1/AV:N/AC:H/PR:H/UI:R/S:U/C:L/I:L/A:L
CVSS 3.1: 8.1 HighCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
Updated: 2026-11-02

Affected products

Affected packages

Affected packages
Package	Affected	Fixed
`zabbix` Debian:12	All versions, plus listed versions 1:6.0.14+dfsg-11:6.0.23+dfsg-11:6.0.23+dfsg-1~bpo12+11:6.0.24+dfsg-11:6.0.25+dfsg-1 Show 24 moreShow less 1:6.0.29+dfsg-11:7.0.0+dfsg-11:7.0.0+dfsg-21:7.0.0+dfsg-2~bpo12+11:7.0.1+dfsg-11:7.0.1+dfsg-1~bpo12+11:7.0.10+dfsg-11:7.0.10+dfsg-21:7.0.2+dfsg-11:7.0.2+dfsg-1~bpo12+11:7.0.22+dfsg-11:7.0.22+dfsg-1.11:7.0.22+dfsg-1~bpo13+11:7.0.22+dfsg-1~deb13u11:7.0.27+dfsg-11:7.0.29+dfsg-11:7.0.29+dfsg-21:7.0.29+dfsg-2~bpo13+11:7.0.3+dfsg-11:7.0.5+dfsg-11:7.0.5+dfsg-1~bpo12+11:7.0.6+dfsg-11:7.0.9+dfsg-11:7.0.9+dfsg-1~bpo12+1	None known
`zabbix` Debian:13	before 1:6.0.24+dfsg-1	1:6.0.24+dfsg-1
`zabbix` Debian:14	before 1:6.0.24+dfsg-1	1:6.0.24+dfsg-1
`zabbix` Debian:10 From an advisory covering 3 CVEs	before 1:4.0.4+dfsg-1+deb10u4, plus listed versions 1:4.0.4+dfsg-11:4.0.4+dfsg-1+deb10u11:4.0.4+dfsg-1+deb10u21:4.0.4+dfsg-1+deb10u3	1:4.0.4+dfsg-1+deb10u4
`zabbix` Debian:11 From an advisory covering 31 CVEs	before 1:5.0.44+dfsg-1+deb11u1, plus listed versions 1:5.0.14+dfsg-11:5.0.14+dfsg-1~bpo11+11:5.0.17+dfsg-11:5.0.17+dfsg-1~bpo11+11:5.0.8+dfsg-1	1:5.0.44+dfsg-1+deb11u1
`zabbix` Ubuntu:Pro:22.04:LTS	All versions, plus listed versions 1:5.0.8+dfsg-1build11:5.0.14+dfsg-11:5.0.17+dfsg-11:5.0.17+dfsg-1ubuntu0.1~esm1	None known

History

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

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

In short

CVE-2023-32726 is a low vulnerability (CVSS 3.9) in Zabbix, published December 18, 2023. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.67%, the 52nd percentile. Fixed in zabbix 1:6.0.24+dfsg-1.

References

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