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.

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History

Mon, 03 Aug 2026 13:45:00 +0000

Type Values Removed Values Added
First Time appeared Sssd
Sssd sssd
Vendors & Products Sssd
Sssd sssd

Mon, 03 Aug 2026 12:15:00 +0000

Type Values Removed Values Added
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.
Title sssd: sssd: NSS responder uninitialized heap disclosure in initgroups reply
Weaknesses CWE-908
References
Metrics threat_severity

None

cvssV3_1

{'score': 3.3, 'vector': 'CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N'}

threat_severity

Low


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cve-icon MITRE

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cve-icon Vulnrichment

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cve-icon NVD

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cve-icon Redhat

Severity : Low

Publid Date: 2026-08-03T07:39:44Z

Links: CVE-2026-68744 - Bugzilla

cve-icon OpenCVE Enrichment

Updated: 2026-08-03T13:30:04Z

Weaknesses