CVE-2026-90463 Memory corruption in Red Hat Enterprise Linux 10
A local attacker can crash the SSSD NSS responder via out-of-bounds read, causing denial of service on Red Hat Enterprise Linux systems.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-90463?
CVE-2026-90463 is a medium-severity memory corruption vulnerability in Red Hat Enterprise Linux 10, published on 14 Sep 2026. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
A flaw was found in the sssd NSS responder. This input validation vulnerability allows a local attacker, by sending specially crafted service lookup requests to the NSS responder's UNIX socket, to cause an out-of-bounds read. This out-of-bounds read may lead to a denial of service (DoS) by crashing the NSS responder process. While unprivileged local clients can typically reach the socket, there is no evidence of privilege escalation or reliable data disclosure.
Weakness: CWE-125
Which versions are affected by CVE-2026-90463?
How do I fix CVE-2026-90463?
No fix has been published for CVE-2026-90463 yet. Limit exposure of the affected software until one is available.
Upgrade to the fixed version. Memory-safe languages, compiler hardening and fuzzing prevent most new cases. More about Memory corruption.
Is CVE-2026-90463 being exploited?
There is no known exploitation of CVE-2026-90463 in the wild and no public exploit code.
Sources
Also known as DEBIAN-CVE-2026-90463, GHSA-p4x8-43x8-6hqq, UBUNTU-CVE-2026-90463.