What’s Vulnerable › Vulnerabilities

CVE-2026-68742: Sssd: sssd: nss responder out-of-bounds read via unchecked addrlen in gethostbyaddr

• Severity: medium (CVSS 5.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.1% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-08-03 · updated 2026-08-31
• Weakness: CWE-125

Description

A flaw was found in SSSD. The sss_nss_protocol_parse_addr() function in the NSS responder does not validate the addrlen field against the remaining packet body size. A local attacker can exploit this via a crafted GETHOSTBYADDR request to the NSS responder socket, causing an out-of-bounds read and process crash, resulting in a denial of service.

Affected products

• [UNKNOWN] sssd: all versions
• Red Hat Enterprise Linux: 7.0, 8.0, 9.0, 10.0
• Red Hat OpenShift Container Platform 4.18: 4.0

References

• https://access.redhat.com/security/cve/CVE-2026-68742
• https://bugzilla.redhat.com/show_bug.cgi?id=2509762

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