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No exploitation reportedFix available

CVE-2026-68742

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

No exploitation reported by the sources we read.

  • Published2026-08-03
  • WeaknessCWE-125

Am I affected?

With a domain, we read the version its public headers and pages expose. A distribution build can carry the fix under an older number.

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.

Timeline

dates in UTC
  1. 2026-08-0309:53CVE publishedCNA

Versions per branch

NVD
Redhat enterprise linux
BranchAffectedFixed in
7.0= 7.0no fix published
8.0= 8.0no fix published
9.0= 9.0no fix published
10.0= 10.0no fix published
Fedoraproject sssd
BranchAffectedFixed in
—all versionsno fix published
Redhat openshift container platform
BranchAffectedFixed in
4.0= 4.0no fix published

as publishedRanges as NVD and OSV publish them; a distribution’s build can be fixed under an older number.

Products declared by the CNA8 products

As redhat, the CNA that assigned this CVE, declared them in the CVE record; versions as written.

2 more products in the CVE record.

Source: the CNA record (CVE Program), © The MITRE Corporation,CVE Terms of UseCVE recordupdated 2026-11-05

Distribution builds and vendor advisories

Packages from OSV.dev and products from the vendors' CSAF advisories.

version not verifiedVersions not verified: read as OSV.dev and the vendors publish them, not checked against each vendor's release list.

Packages

  • sssdUbuntu:Pro:20.04:LTSall versions · no fixed version listed
  • sssdUbuntu:Pro:18.04:LTSall versions · no fixed version listed
  • sssdUbuntu:Pro:16.04:LTSall versions · no fixed version listed
  • sssdUbuntu:26.10all versions · no fixed version listed
  • sssdUbuntu:26.04:LTSall versions · no fixed version listed
  • sssdUbuntu:24.04:LTSall versions · no fixed version listed
  • sssdUbuntu:22.04:LTSall versions · no fixed version listed
  • sssdTuxCare:AlmaLinux:9.6all versions · fixed in 2.9.6-4.el9_6.2.tuxcare.els6and 34 other packages

17 more package ranges on OSV.dev

Vendor advisories

  • CVE-2026-68742 Red Hat Product Security135 known affected

    sssd: sssd: NSS responder out-of-bounds read via unchecked addrlen in GETHOSTBYADDR

    libipa_hbac as a component of Red Hat Enterprise Linux 10 · libsss_autofs as a component of Red Hat Enterprise Linux 10 · libsss_certmap as a component of Red Hat Enterprise Linux 10 · +132 more

Full record on NVD

Fix

  1. Workaround from the vendor Red Hat Product Security CVE-2026-68742 · 135 productsMitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base or stability.
  2. No fix available, says the vendor Red Hat Product Security CVE-2026-68742 · 135 productsFix deferred

Advisories and patches

Detection

Nuclei template
none so far
ProjectDiscovery
Exploit-DB
no entry
Exploit-DB
Proof of concept
Metasploit modules
none listed
Metasploit Framework

Sources

Identifiers

Technical details

CVSS v3 Vector
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Published
2026-08-03
Last Modified
2026-11-05
NVD status
Analyzed
GitHub Advisory
GHSA-pwm5-x9cm-2ppf

Frequently asked questions

What is CVE-2026-68742?

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.

Is CVE-2026-68742 actively exploited?

Active exploitation of CVE-2026-68742 has not been confirmed. Its EPSS score was 0.1% on 2026-11-09, the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2026-68742?

CVE-2026-68742 has a CVSS v3 base score of 5.5 (MEDIUM severity), with vector string CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H.

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Sources for this record