CVE-2026-68744 Sssd: sssd: nss responder uninitialized heap disclosure in initgroups reply

What is CVE-2026-68744?

CVE-2026-68744 is a low-severity vulnerability in Redhat Enterprise Linux, published on 4 Aug 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 SSSD. The sss_nss_protocol_fill_initgr() function in the NSS responder pre-allocates reply space for all group entries but does not shrink the packet when groups are skipped, causing uninitialized heap bytes to be transmitted to the client. A local attacker can exploit this to disclose cached directory data and heap layout information from the sssd_nss process.

Weakness: CWE-908

Which versions are affected by CVE-2026-68744?

It affects 3 products.

Products include Fedoraproject Sssd, Redhat Enterprise Linux, Redhat Openshift Container Platform.

How do I fix CVE-2026-68744?

Apply the vendor's patch.

Is CVE-2026-68744 being exploited?

There is no known exploitation of CVE-2026-68744 in the wild and no public exploit code.

Other vulnerabilities in Redhat Enterprise Linux

• CVE-2022-4254 Other in SSSD High 8.8
• CVE-2012-3462 Auth bypass in sssd High 8.8
• CVE-2026-104048 Sssd: sssd: authorization bypass via cross-domain username collision in hbac evaluation Medium 6.8
• CVE-2015-5292 Denial of service in n/a Medium 6.8
• CVE-2026-12610 Sssd: use-after-free crash in sssd' 'sssd_pam' process Medium 6.4

All Redhat Enterprise Linux vulnerabilities

Sources

• CVE record
• NVD
• OSV
• GitHub advisory
• How this page is made

Also known as CLSA-2026-1788187301, CLSA-2026-1788195197, DEBIAN-CVE-2026-68744, GHSA-xxfg-88q3-gxgm, OESA-2026-3648, UBUNTU-CVE-2026-68744.