Out-of-Bounds Read Vulnerability in SSSD by Red Hat
CVE-2026-68742

5.5MEDIUM

Key Information:

Vendor

Red Hat
Status
Red Hat Enterprise Linux 10
Red Hat Enterprise Linux 6
Red Hat Enterprise Linux 7
Red Hat Enterprise Linux 8
Vendor
CVE Published:
3 August 2026

What is CVE-2026-68742?

An issue exists in the SSSD's NSS responder, specifically within the sss_nss_protocol_parse_addr() function. This flaw arises due to a lack of validation on the addrlen field compared to the packet body size. A local attacker can exploit it by sending a crafted GETHOSTBYADDR request to the NSS responder socket, which can lead to an out-of-bounds read. The resulting effect may crash the process, causing a denial of service within the affected systems.

References

https://access.redhat.com/security/cve/CVE-2026-68742
vdb-entryx_refsource_REDHAT
https://bugzilla.redhat.com/show_bug.cgi?id=2509762
issue-trackingx_refsource_REDHAT

CVSS V3.1

Score:
5.5
Severity:
MEDIUM
Confidentiality:
None
Integrity:
None
Availability:
None
Attack Vector:
Local
Attack Complexity:
Low
Privileges Required:
Low
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

Credit

Red Hat would like to thank Vivek Parikh (BreachX Zero Day Labs) for reporting this issue.
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