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Vulnerability · Published Aug 4, 2026 · Assigned by redhat

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

Low 3.3

In plain English

A low-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)3.3Low
Exploit odds (30 days)0.1%top 97.2% 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_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.

Affected packages & fixed versions

EcosystemPackageFixed inAdvisory
Debian:12sssdno fix listedDEBIAN-CVE-2026-68744
Debian:13sssdno fix listedDEBIAN-CVE-2026-68744
Ubuntu:22.04:LTSsssdno fix listedUBUNTU-CVE-2026-68744
Ubuntu:24.04:LTSsssdno fix listedUBUNTU-CVE-2026-68744
Ubuntu:26.04:LTSsssdno fix listedUBUNTU-CVE-2026-68744
Ubuntu:26.10sssdno fix listedUBUNTU-CVE-2026-68744

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-908 · Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N

References