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Vulnerability record · CVE-2026-68744 · published 4 August 2026

CVE-2026-68744: Fedoraproject sssd use of uninitialized resource vulnerability

Fedoraproject · Sssd

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.

3.3 CVSS 3.1 Low EPSS 0.13% · top 97.7% CWE-908 · Use of uninitialized resource
3.3CVSS 3.1 base score
0.13%EPSS exploitation probability, 30 days
NoNot in CISA KEV
3Affected product versions listed by NVD
2References
31 Aug 2026Last modified by NVD

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.

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N

Affected products

3 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://access.redhat.com/security/cve/CVE-2026-68744 Vendor Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=2509761 Issue TrackingVendor Advisory

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Source: NIST National Vulnerability Database (record CVE-2026-68744), CISA KEV, FIRST EPSS (scores of 2026-09-29). This page is refreshed as NVD updates the record.