CVE-2022-4639

sslh Packet Dumping probe.c hexdump format string

5.6 Medium

A vulnerability, which was classified as critical, has been found in sslh. This issue affects the function hexdump of the file probe.c of the component Packet Dumping Handler. The manipulation of the argument msg_info leads to format string. The attack may be initiated remotely. The name of the patch is b19f8a6046b080e4c2e28354a58556bb26040c6f. It is recommended to apply a patch to fix this issue. The identifier VDB-216497 was assigned to this vulnerability.

Attack profile

How easy it is to exploit

Attack vector: Network
Complexity: High
Privileges needed: None
User interaction: None

What an attacker can affect

Confidentiality: Low
Integrity: Low
Availability: Low

Exploit likelihood

0.93%Unchanged since Dec 22, 2022

What each source reports

CVE List Score used 5.6

sslh Packet Dumping probe.c hexdump format string

Record: CVE-2022-4639
CVSS 3.1: 5.6 MediumCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:L
Weakness: CWE-119
Updated: 2026-11-02

EUVDEUVD-2022-51968 5.6

Record: EUVD-2022-51968
CVSS 3.1: 5.6 MediumCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:L
Updated: 2026-11-02

GitHub AdvisoriesGHSA-f594-pvw5-8f79 9.8

A vulnerability, which was classified as critical, has been found in sslh. This issue affects the...

Record: GHSA-f594-pvw5-8f79
CVSS 3.1: 9.8 CriticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Weakness: CWE-119, CWE-134
Updated: 2026-11-02

NVD 5.6

Record: CVE-2022-4639
CVSS 3.1: 5.6 MediumCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:L
CVSS 3.1: 9.8 CriticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Weakness: CWE-119, CWE-134
Updated: 2026-11-02

OSV 5.6

sslh Packet Dumping probe.c hexdump format string

Record: CVE-2022-4639
CVSS 3.1: 5.6 MediumCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:L
Weakness: CWE-119
Updated: 2026-11-02

OSVUBUNTU-CVE-2022-4639 5.6

Record: UBUNTU-CVE-2022-4639
CVSS 3.1: 5.6 MediumCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:L
CVSS 3.1: 9.8 CriticalCVSS:3.1/AV:N/AC:L/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
`sslh` Ubuntu:Pro:16.04:LTS	All versions, plus listed versions 1.17-21.17-2ubuntu0.1~esm1	None known
`sslh` Ubuntu:Pro:18.04:LTS	All versions, plus listed versions 1.18-11.18-1ubuntu0.1~esm1	None known
`sslh` Ubuntu:Pro:20.04:LTS	All versions, plus listed versions 1.18-11.20-11.20-1+deb11u1build0.20.04.1	None known
`sslh` Ubuntu:22.04:LTS	All versions, plus listed versions 1.20-11.20-1+deb11u1build0.22.04.1	None known
`sslh` Ubuntu:Pro:24.04:LTS	All versions, plus listed versions 1.20-1.11.22c-11.22c-1ubuntu0.1~esm1	None known
`sslh` Ubuntu:25.10	All versions, plus listed versions 2.1.4-1build12.1.4-1ubuntu0.25.10.1	None known
`sslh` Ubuntu:26.10	All versions, plus listed versions 2.1.4-1build2	None known
`sslh` Ubuntu:26.04:LTS	All versions, plus listed versions 2.1.4-1build12.1.4-1build22.1.4-1ubuntu0.26.04.1	None known

History

History
Recorded	Changed	Sources
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-2022-4639 is a medium vulnerability (CVSS 5.6) in Sslh Project Sslh, published December 21, 2022. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.93%, the 60th percentile. No source names a fixed version.