Sssd: sssd: nss responder out-of-bounds read via unchecked addrlen in gethostbyaddr (CVE-2026-68742) | HOL Guard CVE

Medium · CVSS 5.5CVE-2026-68742

Sssd: sssd: nss responder out-of-bounds read via unchecked addrlen in gethostbyaddr

Answer in brief

CVE-2026-68742 records a Medium severity (CVSS 5.5) vulnerability in Sssd: sssd: nss responder out-of-bounds read via unchecked addrlen in gethostbyaddr. The current sources do not mark it as known exploited. Affected software not mapped in the current feed; confirm the named product and version against your inventory.

Analysis pending evidence review

HOL Guard separates source facts from reviewed analysis. See the methodology.

Published Aug 3, 2026Updated Aug 31, 2026Source checked Aug 31, 2026First seen by HOL Aug 3, 2026Material review Aug 31, 2026

Upstream Advisory

Key facts

Risk: Medium · CVSS 5.5
Exploitation: Not marked as known exploited
Affected software: 6 mapped packages or products
Fix availability: Not reported

Why this deserves its current priority

CVSS is 5.5. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.

Analysis status

Analysis pending evidence review

Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.

Affected scope and exposure questions

Affected software not mapped in the current feed; confirm the named product and version against your inventory.

Affected products and reported versions
Product	Affected versions	Fixed versions
cpe:2.3:a:fedoraproject:sssd:-:::::::*	Not reported	Not reported
cpe:2.3:a:redhat:openshift_container_platform:4.0:::::::*	Not reported	Not reported
cpe:2.3:o:redhat:enterprise_linux:10.0:::::::*	Not reported	Not reported
cpe:2.3:o:redhat:enterprise_linux:7.0:::::::*	Not reported	Not reported
cpe:2.3:o:redhat:enterprise_linux:8.0:::::::*	Not reported	Not reported
cpe:2.3:o:redhat:enterprise_linux:9.0:::::::*	Not reported	Not reported

Recommended response

Confirm exposure. Identify whether the named product or interface exists in your inventory, then review the linked upstream references for affected versions and vendor guidance.

Evidence timeline and material changes

Published upstream
Aug 3, 2026
Evidence: source:cvelist:source_dates:source-dates:record
Source modified
Aug 31, 2026
Evidence: source:cvelist:source_dates:source-dates:record
First seen by HOL
Aug 3, 2026

Sources and claim methodology

Upstream source description

A flaw was found in SSSD. The sss_nss_protocol_parse_addr() function in the NSS responder does not validate the addrlen field against the remaining packet body size. A local attacker can exploit this via a crafted GETHOSTBYADDR request to the NSS responder socket, causing an out-of-bounds read and process crash, resulting in a denial of service.

Quoted source text, attributed separately from HOL analysis.