CVE-2026-68744
LOWSssd: sssd: nss responder uninitialized heap disclosure in initgroups reply
Title source: cnaDescription
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.
References (2)
Core 2
Core References
Vdb Entry, X_Refsource_Redhat vdb-entry
x_refsource_redhat
https://access.redhat.com/security/cve/CVE-2026-68744
Issue Tracking, X_Refsource_Redhat issue-tracking
x_refsource_redhat
RHBZ#2509761
https://bugzilla.redhat.com/show_bug.cgi?id=2509761
Scores
CVSS v3
3.3
EPSS
0.0010
EPSS Percentile
0.9%
Attack Vector
LOCAL
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N
CISA SSVC
Vulnrichment
Exploitation
none
Automatable
no
Technical Impact
partial
Details
CWE
CWE-908
Status
published
Products (6)
Red Hat/Red Hat Enterprise Linux 10
Red Hat/Red Hat Enterprise Linux 6
Red Hat/Red Hat Enterprise Linux 7
Red Hat/Red Hat Enterprise Linux 8
Red Hat/Red Hat Enterprise Linux 9
Red Hat/Red Hat OpenShift Container Platform 4
Published
Aug 04, 2026
Tracked Since
Aug 04, 2026