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Vulnerability · Published Aug 3, 2026 · Assigned by redhat

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

Medium 5.5

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 3% of all known vulnerabilities).

Severity (CVSS 3.1)5.5Medium
Exploit odds (30 days)0.1%top 97.3% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known

Official 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 packages & fixed versions

EcosystemPackageFixed inAdvisory
Debian:12sssdno fix listedDEBIAN-CVE-2026-68742
Debian:13sssdno fix listedDEBIAN-CVE-2026-68742
Ubuntu:22.04:LTSsssdno fix listedUBUNTU-CVE-2026-68742
Ubuntu:24.04:LTSsssdno fix listedUBUNTU-CVE-2026-68742
Ubuntu:26.04:LTSsssdno fix listedUBUNTU-CVE-2026-68742
Ubuntu:26.10sssdno fix listedUBUNTU-CVE-2026-68742

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
Red Hat Red Hat OpenShift Container Platform 5 see references

Weakness: CWE-125 · Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

References