Vulnerability · Published Sep 14, 2026 · Assigned by redhat
CVE-2026-90463Sssd: local oob read in nss service request parsers (`sss_nss_protocol_parse_svc_name` / `sss_nss_protocol_parse_svc_port`)
Medium 4.0
In plain English
A medium-severity out-of-bounds read 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 4% of all known vulnerabilities).
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.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian:12 | sssd | no fix listed | DEBIAN-CVE-2026-90463 |
| Debian:13 | sssd | no fix listed | DEBIAN-CVE-2026-90463 |
| Ubuntu:22.04:LTS | sssd | no fix listed | UBUNTU-CVE-2026-90463 |
| Ubuntu:24.04:LTS | sssd | no fix listed | UBUNTU-CVE-2026-90463 |
| Ubuntu:26.04:LTS | sssd | no fix listed | UBUNTU-CVE-2026-90463 |
| Ubuntu:26.10 | sssd | no fix listed | UBUNTU-CVE-2026-90463 |
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| Red Hat | Red Hat Enterprise Linux 10 | see references |
| Red Hat | Red Hat Enterprise Linux 6 | 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-125 · Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
References
- https://access.redhat.com/security/cve/CVE-2026-90463 vdb-entry, x_refsource_REDHAT
- RHBZ#2479268 issue-tracking, x_refsource_REDHAT