Vulnerability-Lookup

OESA-2026-2169 (CVE-2026-6245)

Vulnerability from osv_openeuler – Published: 2026-05-03 11:11 – Updated: 2026-08-06 11:11 – Source website

Summary

sssd security update

Details

Provides a set of daemons to manage access to remote directories and authentication mechanisms. It provides an NSS and PAM interface toward the system and a pluggable back end system to connect to multiple different account sources. It is also the basis to provide client auditing and policy services for projects like FreeIPA.

Security Fix(es):

A flaw was found in the System Security Services Daemon (SSSD). The pam_passkey_child_read_data() function within the PAM passkey responder fails to properly handle raw bytes received from a pipe. Because the data is treated as a NUL-terminated C string without explicit termination, it results in an out-of-bounds read when processed by functions like snprintf(). A local attacker could potentially trigger this vulnerability by initiating a crafted passkey authentication request, causing the SSSD PAM responder to crash, resulting in a local Denial of Service (DoS).(CVE-2026-6245)

Severity

5.5 (Medium)


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

References

URL

Type

	https://www.openeuler.org/zh/security/security-bu…	ADVISORY
	https://nvd.nist.gov/vuln/detail/CVE-2026-6245	ADVISORY

JSON

To clipboard

{
  "affected": [
    {
      "ecosystem_specific": {
        "aarch64": [
          "libipa_hbac-2.9.4-18.oe2403.aarch64.rpm",
          "libipa_hbac-devel-2.9.4-18.oe2403.aarch64.rpm",
          "libsss_autofs-2.9.4-18.oe2403.aarch64.rpm",
          "libsss_certmap-2.9.4-18.oe2403.aarch64.rpm",
          "libsss_certmap-devel-2.9.4-18.oe2403.aarch64.rpm",
          "libsss_idmap-2.9.4-18.oe2403.aarch64.rpm",
          "libsss_idmap-devel-2.9.4-18.oe2403.aarch64.rpm",
          "libsss_nss_idmap-2.9.4-18.oe2403.aarch64.rpm",
          "libsss_nss_idmap-devel-2.9.4-18.oe2403.aarch64.rpm",
          "libsss_sudo-2.9.4-18.oe2403.aarch64.rpm",
          "python3-libipa_hbac-2.9.4-18.oe2403.aarch64.rpm",
          "python3-libsss_nss_idmap-2.9.4-18.oe2403.aarch64.rpm",
          "python3-sss-2.9.4-18.oe2403.aarch64.rpm",
          "python3-sss-murmur-2.9.4-18.oe2403.aarch64.rpm",
          "sssd-2.9.4-18.oe2403.aarch64.rpm",
          "sssd-ad-2.9.4-18.oe2403.aarch64.rpm",
          "sssd-client-2.9.4-18.oe2403.aarch64.rpm",
          "sssd-common-2.9.4-18.oe2403.aarch64.rpm",
          "sssd-common-pac-2.9.4-18.oe2403.aarch64.rpm",
          "sssd-dbus-2.9.4-18.oe2403.aarch64.rpm",
          "sssd-debuginfo-2.9.4-18.oe2403.aarch64.rpm",
          "sssd-debugsource-2.9.4-18.oe2403.aarch64.rpm",
          "sssd-idp-2.9.4-18.oe2403.aarch64.rpm",
          "sssd-ipa-2.9.4-18.oe2403.aarch64.rpm",
          "sssd-kcm-2.9.4-18.oe2403.aarch64.rpm",
          "sssd-krb5-2.9.4-18.oe2403.aarch64.rpm",
          "sssd-krb5-common-2.9.4-18.oe2403.aarch64.rpm",
          "sssd-ldap-2.9.4-18.oe2403.aarch64.rpm",
          "sssd-nfs-idmap-2.9.4-18.oe2403.aarch64.rpm",
          "sssd-proxy-2.9.4-18.oe2403.aarch64.rpm",
          "sssd-tools-2.9.4-18.oe2403.aarch64.rpm",
          "sssd-winbind-idmap-2.9.4-18.oe2403.aarch64.rpm"
        ],
        "noarch": [
          "python3-sssdconfig-2.9.4-18.oe2403.noarch.rpm",
          "sssd-help-2.9.4-18.oe2403.noarch.rpm"
        ],
        "src": [
          "sssd-2.9.4-18.oe2403.src.rpm"
        ],
        "x86_64": [
          "libipa_hbac-2.9.4-18.oe2403.x86_64.rpm",
          "libipa_hbac-devel-2.9.4-18.oe2403.x86_64.rpm",
          "libsss_autofs-2.9.4-18.oe2403.x86_64.rpm",
          "libsss_certmap-2.9.4-18.oe2403.x86_64.rpm",
          "libsss_certmap-devel-2.9.4-18.oe2403.x86_64.rpm",
          "libsss_idmap-2.9.4-18.oe2403.x86_64.rpm",
          "libsss_idmap-devel-2.9.4-18.oe2403.x86_64.rpm",
          "libsss_nss_idmap-2.9.4-18.oe2403.x86_64.rpm",
          "libsss_nss_idmap-devel-2.9.4-18.oe2403.x86_64.rpm",
          "libsss_sudo-2.9.4-18.oe2403.x86_64.rpm",
          "python3-libipa_hbac-2.9.4-18.oe2403.x86_64.rpm",
          "python3-libsss_nss_idmap-2.9.4-18.oe2403.x86_64.rpm",
          "python3-sss-2.9.4-18.oe2403.x86_64.rpm",
          "python3-sss-murmur-2.9.4-18.oe2403.x86_64.rpm",
          "sssd-2.9.4-18.oe2403.x86_64.rpm",
          "sssd-ad-2.9.4-18.oe2403.x86_64.rpm",
          "sssd-client-2.9.4-18.oe2403.x86_64.rpm",
          "sssd-common-2.9.4-18.oe2403.x86_64.rpm",
          "sssd-common-pac-2.9.4-18.oe2403.x86_64.rpm",
          "sssd-dbus-2.9.4-18.oe2403.x86_64.rpm",
          "sssd-debuginfo-2.9.4-18.oe2403.x86_64.rpm",
          "sssd-debugsource-2.9.4-18.oe2403.x86_64.rpm",
          "sssd-idp-2.9.4-18.oe2403.x86_64.rpm",
          "sssd-ipa-2.9.4-18.oe2403.x86_64.rpm",
          "sssd-kcm-2.9.4-18.oe2403.x86_64.rpm",
          "sssd-krb5-2.9.4-18.oe2403.x86_64.rpm",
          "sssd-krb5-common-2.9.4-18.oe2403.x86_64.rpm",
          "sssd-ldap-2.9.4-18.oe2403.x86_64.rpm",
          "sssd-nfs-idmap-2.9.4-18.oe2403.x86_64.rpm",
          "sssd-proxy-2.9.4-18.oe2403.x86_64.rpm",
          "sssd-tools-2.9.4-18.oe2403.x86_64.rpm",
          "sssd-winbind-idmap-2.9.4-18.oe2403.x86_64.rpm"
        ]
      },
      "package": {
        "ecosystem": "openEuler:24.03-LTS",
        "name": "sssd",
        "purl": "pkg:rpm/openEuler/sssd\u0026distro=openEuler-24.03-LTS"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "2.9.4-18.oe2403"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "database_specific": {
    "severity": "Medium"
  },
  "details": "Provides a set of daemons to manage access to remote directories and authentication mechanisms. It provides an NSS and PAM interface toward the system and a pluggable back end system to connect to multiple different account sources. It is also the basis to provide client auditing and policy services for projects like FreeIPA.\r\n\r\nSecurity Fix(es):\n\nA flaw was found in the System Security Services Daemon (SSSD). The pam_passkey_child_read_data() function within the PAM passkey responder fails to properly handle raw bytes received from a pipe. Because the data is treated as a NUL-terminated C string without explicit termination, it results in an out-of-bounds read when processed by functions like snprintf(). A local attacker could potentially trigger this vulnerability by initiating a crafted passkey authentication request, causing the SSSD PAM responder to crash, resulting in a local Denial of Service (DoS).(CVE-2026-6245)",
  "id": "OESA-2026-2169",
  "modified": "2026-08-06T11:11:09Z",
  "published": "2026-05-03T11:11:09Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://www.openeuler.org/zh/security/security-bulletins/detail/?id=openEuler-SA-2026-2169"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-6245"
    }
  ],
  "schema_version": "1.7.2",
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
      "type": "CVSS_V3"
    }
  ],
  "summary": "sssd security update",
  "upstream": [
    "CVE-2026-6245"
  ]
}

CVE-2026-6245 (GCVE-0-2026-6245)

Vulnerability from cvelistv5 – Published: 2026-04-15 18:35 – Updated: 2026-09-01 11:44

Title

Sssd: out-of-bounds read in the sssd

Summary

Severity

5.5 (Medium)


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

SSVC

Exploitation: none Automatable: no Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-04-15 19:36 UTC

CWE

CWE-805 - Buffer Access with Incorrect Length Value

Assigner

redhat redhat root

References

2 references

URL	Tags
https://access.redhat.com/security/cve/CVE-2026-6245	vdb-entryx_refsource_REDHAT
https://bugzilla.redhat.com/show_bug.cgi?id=2457954	issue-trackingx_refsource_REDHAT

Impacted products

6 products

Vendor	Product	Version
Red Hat	Red Hat Enterprise Linux 10	cpe:/o:redhat:enterprise_linux:10
Red Hat	Red Hat Enterprise Linux 6	cpe:/o:redhat:enterprise_linux:6
Red Hat	Red Hat Enterprise Linux 7	cpe:/o:redhat:enterprise_linux:7
Red Hat	Red Hat Enterprise Linux 8	cpe:/o:redhat:enterprise_linux:8
Red Hat	Red Hat Enterprise Linux 9	cpe:/o:redhat:enterprise_linux:9
Red Hat	Red Hat OpenShift Container Platform 4	cpe:/a:redhat:openshift:4

Date Public

2026-04-15 18:20

Show details on NVD website

JSON

To clipboard

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                "id": "CVE-2026-6245",
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Sightings

Author	Source	Type	Date	Other

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

Detection rules are retrieved from Rulezet.

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.

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OESA-2026-2169 (CVE-2026-6245)

CVE-2026-6245 (GCVE-0-2026-6245)

Tags

Sightings

Nomenclature

Related by attack behaviour