Vulnerability · Published Oct 26, 2026 · Assigned by redhat
CVE-2026-116497Gssproxy: gssproxy: null pointer dereference in gssx_init_sec_context crashes daemon
Medium 5.5
In plain English
A medium-severity null pointer dereference in Red Hat Enterprise Linux 10 from Red Hat. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.1% (higher than 3% of all known vulnerabilities).
Official description
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.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian:12 | gssproxy | no fix listed | DEBIAN-CVE-2026-116497 |
| Debian:13 | gssproxy | no fix listed | DEBIAN-CVE-2026-116497 |
| Debian:14 | gssproxy | no fix listed | DEBIAN-CVE-2026-116497 |
| Ubuntu:22.04:LTS | gssproxy | no fix listed | UBUNTU-CVE-2026-116497 |
| Ubuntu:24.04:LTS | gssproxy | no fix listed | UBUNTU-CVE-2026-116497 |
| Ubuntu:26.04:LTS | gssproxy | no fix listed | UBUNTU-CVE-2026-116497 |
| Ubuntu:26.10 | gssproxy | no fix listed | UBUNTU-CVE-2026-116497 |
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| Red Hat | Red Hat Enterprise Linux 10 | see references |
| Red Hat | Red Hat Enterprise Linux 7 | see references |
| Red Hat | Red Hat Enterprise Linux 8 | see references |
| Red Hat | Red Hat Enterprise Linux 9 | see references |
| Red Hat | Red Hat OpenShift Container Platform 4 | see references |
| Red Hat | Red Hat OpenShift Container Platform 4 | see references |
| Red Hat | Red Hat OpenShift Container Platform 5 | see references |
Weakness: CWE-476 · Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
References
- https://access.redhat.com/security/cve/CVE-2026-116497 vdb-entry, x_refsource_REDHAT
- RHBZ#2560642 issue-tracking, x_refsource_REDHAT