CVE-2026-116497

Gssproxy: gssproxy: null pointer dereference in gssx_init_sec_context crashes daemon

5.5 Medium

A NULL pointer dereference vulnerability was found in gssproxy. When a GSSX_INIT_SEC_CONTEXT request is received with the target_name field absent, the daemon dereferences the resulting NULL pointer and crashes. The request requires no authentication, allowing any local user to crash the gssproxy daemon via its Unix socket. The daemon does not automatically restart, resulting in a persistent denial of service that also affects dependent services such as Kerberized NFS and IdM.

Attack profile

How easy it is to exploit

Attack vector: Local
Complexity: Low
Privileges needed: Low
User interaction: None

What an attacker can affect

Confidentiality: None
Integrity: None
Availability: High

Exploit likelihood

0.14%Unchanged since Oct 27, 2026

What each source reports

CVE List Score used 5.5

Gssproxy: gssproxy: null pointer dereference in gssx_init_sec_context crashes daemon

Record: CVE-2026-116497
CVSS 3.1: 5.5 MediumCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Weakness: CWE-476
Updated: 2026-11-05

EUVDEUVD-2026-109941 5.5

Record: EUVD-2026-109941
CVSS 3.1: 5.5 MediumCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Updated: 2026-11-05

GitHub AdvisoriesGHSA-9crw-qhvr-v43j 5.5

A NULL pointer dereference vulnerability was found in gssproxy. When a GSSX_INIT_SEC_CONTEXT...

Record: GHSA-9crw-qhvr-v43j
CVSS 3.1: 5.5 MediumCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Weakness: CWE-476
Updated: 2026-11-02

NVD 5.5

Record: CVE-2026-116497
CVSS 3.1: 5.5 MediumCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Weakness: CWE-476
Updated: 2026-11-05

OSVDEBIAN-CVE-2026-116497 5.5

Record: DEBIAN-CVE-2026-116497
CVSS 3.1: 5.5 MediumCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Updated: 2026-11-02

OSVUBUNTU-CVE-2026-116497 5.5

Record: UBUNTU-CVE-2026-116497
CVSS 3.1: 5.5 MediumCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Updated: 2026-11-02

Affected products

Affected packages

Affected packages
Package	Affected	Fixed
`gssproxy` Debian:12	All versions, plus listed versions 0.9.1-10.9.2-10.9.2-20.9.2-30.9.2-40.9.2-50.9.2-5~exp0	None known
`gssproxy` Debian:13	All versions, plus listed versions 0.9.2-30.9.2-40.9.2-50.9.2-5~exp0	None known
`gssproxy` Debian:14	All versions, plus listed versions 0.9.2-30.9.2-40.9.2-50.9.2-5~exp0	None known
`gssproxy` Ubuntu:18.04:LTS	All versions, plus listed versions 0.5.1-20.7.0+git20171223-20.8.0-1	None known
`gssproxy` Ubuntu:20.04:LTS	All versions, plus listed versions 0.8.0-1.10.8.2-10.8.2-20.8.2-2ubuntu0.20.04.1	None known
`gssproxy` Ubuntu:22.04:LTS	All versions, plus listed versions 0.8.4-10.8.4-2	None known
`gssproxy` Ubuntu:24.04:LTS	All versions, plus listed versions 0.9.1-10.9.2-10.9.2-20.9.2-2build10.9.2-2build2	None known
`gssproxy` Ubuntu:26.10	All versions, plus listed versions 0.9.2-40.9.2-5	None known
`gssproxy` Ubuntu:26.04:LTS	All versions, plus listed versions 0.9.2-30.9.2-4	None known

History

History
Recorded	Changed	Sources
Nov 5, 2026	facts, products	CVE List
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-2026-116497 is a medium vulnerability (CVSS 5.5) in Red Hat Enterprise Linux 10, published October 26, 2026. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.14%, the 3rd percentile. No source names a fixed version.