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Vulnerability · Published Sep 14, 2026 · Assigned by redhat

CVE-2026-90996Sssd: sssd: denial of service in nss responder via crafted zero-length requests

Medium 4.0

In plain English

A medium-severity security flaw 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).

Severity (CVSS 3.1)4.0Medium
Exploit odds (30 days)0.1%top 97.5% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known

Official description

A flaw was found in sssd. A local unprivileged user could send a specially crafted request with a zero-length body to the Network Security Services (NSS) responder. This could lead to a denial-of-service condition, causing the NSS responder to become unstable or terminate. This vulnerability affects the availability of the system responder.

Affected packages & fixed versions

EcosystemPackageFixed inAdvisory
Debian:12sssdno fix listedDEBIAN-CVE-2026-90996
Debian:13sssdno fix listedDEBIAN-CVE-2026-90996
Ubuntu:22.04:LTSsssdno fix listedUBUNTU-CVE-2026-90996
Ubuntu:24.04:LTSsssdno fix listedUBUNTU-CVE-2026-90996
Ubuntu:26.04:LTSsssdno fix listedUBUNTU-CVE-2026-90996
Ubuntu:26.10sssdno fix listedUBUNTU-CVE-2026-90996

Affected products (as reported)

VendorProductVersions
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

Weakness: CWE-191 · Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L

References