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CVE-2026-13757

P11-kit: stack exhaustion via unbounded recursion in rpc attribute parsing

publishedCWE-674

A flaw was found in p11-kit. The RPC message attribute parsing functions p11_rpc_message_get_attribute() and p11_rpc_message_get_attribute_array_value() form a mutually-recursive call chain with no recursion depth limit when processing nested CKA_WRAP_TEMPLATE, CKA_UNWRAP_TEMPLATE, and CKA_DERIVE_TEMPLATE attributes. An unauthenticated attacker with local access to the p11-kit RPC Unix domain socket can send a specially crafted request with deeply nested template attributes, causing stack exhaustion and crashing the p11-kit server process and its dependent services.

Technical severity6.2 mediumCVSS 3.1 · CNA: redhat
Published2026-06-29Source updated 2026-11-06
Collected2026-11-063 attributed sources

Fixes and workarounds

Workaround

This CVE requires same-user access to the p11-kit RPC Unix domain socket (/run/user/<uid>/p11-kit/pkcs11-*). Any process running as the socket-owning user can trigger the crash without further authentication. If p11-kit is managed via systemd --user, ensure `Restart=on-failure` is set in the unit file so that a crash is automatically recovered without manual intervention. Red Hat recommends updating p11-kit to version 0.26.3 or later, which introduces a recursion depth limit in the RPC attribute parsing and fully addresses this flaw.

Source: CNA: redhat

Affected products and versions

ProductVersionsAuthority
Red Hat Enterprise Linux 10
Red Hat
p11-kit
https://access.redhat.com/downloads/content/package-browser/ 		≥ 0:0.26.4-1.el10_2; < * (unaffected, rpm)
Other versions: affected 		CNA: redhat
Red Hat Enterprise Linux 9
Red Hat
p11-kit
https://access.redhat.com/downloads/content/package-browser/ 		≥ 0:0.26.4-1.el9_8; < * (unaffected, rpm)
Other versions: affected 		CNA: redhat
Cert Manager support for Red Hat OpenShift release 1.17
Red Hat
cert-manager/jetstack-cert-manager-acmesolver-rhel9
https://catalog.redhat.com/software/containers/ 		≥ 1791371080; < * (unaffected, rpm)
Other versions: affected 		CNA: redhat
Cert Manager support for Red Hat OpenShift release 1.17
Red Hat
cert-manager/jetstack-cert-manager-rhel9
https://catalog.redhat.com/software/containers/ 		≥ 1791371069; < * (unaffected, rpm)
Other versions: affected 		CNA: redhat
Cert Manager support for Red Hat OpenShift release 1.17
Red Hat
cert-manager/cert-manager-operator-rhel9
https://catalog.redhat.com/software/containers/ 		≥ 1791788287; < * (unaffected, rpm)
Other versions: affected 		CNA: redhat
Cert Manager support for Red Hat OpenShift release 1.17
Red Hat
cert-manager/cert-manager-istio-csr-rhel9
https://catalog.redhat.com/software/containers/ 		≥ 1791378395; < * (unaffected, rpm)
Other versions: affected 		CNA: redhat
Cert Manager support for Red Hat OpenShift release 1.17
Red Hat
cert-manager/cert-manager-operator-bundle
https://catalog.redhat.com/software/containers/ 		≥ 1791970484; < * (unaffected, rpm)
Other versions: affected 		CNA: redhat
Cert Manager support for Red Hat OpenShift release 1.18
Red Hat
cert-manager/jetstack-cert-manager-acmesolver-rhel9
https://catalog.redhat.com/software/containers/ 		≥ 1791459707; < * (unaffected, rpm)
Other versions: affected 		CNA: redhat
Cert Manager support for Red Hat OpenShift release 1.18
Red Hat
cert-manager/jetstack-cert-manager-rhel9
https://catalog.redhat.com/software/containers/ 		≥ 1791459711; < * (unaffected, rpm)
Other versions: affected 		CNA: redhat
Cert Manager support for Red Hat OpenShift release 1.18
Red Hat
cert-manager/cert-manager-istio-csr-rhel9
https://catalog.redhat.com/software/containers/ 		≥ 1791459759; < * (unaffected, rpm)
Other versions: affected 		CNA: redhat
Cert Manager support for Red Hat OpenShift release 1.18
Red Hat
cert-manager/cert-manager-operator-rhel9
https://catalog.redhat.com/software/containers/ 		≥ 1789029076; < * (unaffected, rpm)
Other versions: affected 		CNA: redhat
Cert Manager support for Red Hat OpenShift release 1.18
Red Hat
cert-manager/cert-manager-operator-bundle
https://catalog.redhat.com/software/containers/ 		≥ 1791966259; < * (unaffected, rpm)
Other versions: affected 		CNA: redhat
Cert Manager support for Red Hat OpenShift release 1.20
Red Hat
cert-manager/jetstack-cert-manager-rhel9
https://catalog.redhat.com/software/containers/ 		≥ 1790223279; < * (unaffected, rpm)
Other versions: affected 		CNA: redhat
Cert Manager support for Red Hat OpenShift release 1.20
Red Hat
cert-manager/cert-manager-istio-csr-rhel9
https://catalog.redhat.com/software/containers/ 		≥ 1790223719; < * (unaffected, rpm)
Other versions: affected 		CNA: redhat
Cert Manager support for Red Hat OpenShift release 1.20
Red Hat
cert-manager/cert-manager-operator-rhel9
https://catalog.redhat.com/software/containers/ 		≥ 1790272426; < * (unaffected, rpm)
Other versions: affected 		CNA: redhat
Cert Manager support for Red Hat OpenShift release 1.20
Red Hat
cert-manager/jetstack-cert-manager-acmesolver-rhel9
https://catalog.redhat.com/software/containers/ 		≥ 1790589998; < * (unaffected, rpm)
Other versions: affected 		CNA: redhat
Cert Manager support for Red Hat OpenShift release 1.20
Red Hat
cert-manager/jetstack-cert-manager-rhel9
https://catalog.redhat.com/software/containers/ 		≥ 1790589912; < * (unaffected, rpm)
Other versions: affected 		CNA: redhat
Cert Manager support for Red Hat OpenShift release 1.20
Red Hat
cert-manager/cert-manager-istio-csr-rhel9
https://catalog.redhat.com/software/containers/ 		≥ 1790589914; < * (unaffected, rpm)
Other versions: affected 		CNA: redhat
Cert Manager support for Red Hat OpenShift release 1.20
Red Hat
cert-manager/cert-manager-operator-rhel9
https://catalog.redhat.com/software/containers/ 		≥ 1790589855; < * (unaffected, rpm)
Other versions: affected 		CNA: redhat
Cert Manager support for Red Hat OpenShift release 1.20
Red Hat
cert-manager/cert-manager-trust-manager-rhel9
https://catalog.redhat.com/software/containers/ 		≥ 1790598593; < * (unaffected, rpm)
Other versions: affected 		CNA: redhat
Cost Management 4
Red Hat
costmanagement/costmanagement-metrics-rhel9-operator
https://catalog.redhat.com/software/containers/ 		≥ 1790844333; < * (unaffected, rpm)
Other versions: affected 		CNA: redhat
Red Hat Discovery 2
Red Hat
discovery/discovery-server-rhel9
https://catalog.redhat.com/software/containers/ 		≥ 1786638573; < * (unaffected, rpm)
Other versions: affected 		CNA: redhat
Red Hat Discovery 2
Red Hat
discovery/discovery-ui-rhel9
https://catalog.redhat.com/software/containers/ 		≥ 1786634825; < * (unaffected, rpm)
Other versions: affected 		CNA: redhat
Red Hat Hardened Images
Red Hat
p11-kit-main
https://catalog.redhat.com/software/containers/ 		≥ 0.26.2-1.2.hum1; < * (unaffected, rpm)
Other versions: affected 		CNA: redhat
Red Hat Hardened Images
Red Hat
p11-kit-main
https://catalog.redhat.com/software/containers/ 		≥ 0.26.4-1.hum1; < * (unaffected, rpm)
Other versions: affected 		CNA: redhat
Red Hat Insights proxy 1.5
Red Hat
insights-proxy/insights-proxy-container-rhel9
https://catalog.redhat.com/software/containers/ 		≥ 1786433656; < * (unaffected, rpm)
Other versions: affected 		CNA: redhat
Red Hat Update Infrastructure 5
Red Hat
rhui5/cds-kubernetes-rhel9
https://catalog.redhat.com/software/containers/ 		≥ 1786435241; < * (unaffected, rpm)
Other versions: affected 		CNA: redhat
Red Hat Update Infrastructure 5
Red Hat
rhui5/cds-rhel9
https://catalog.redhat.com/software/containers/ 		≥ 1786533457; < * (unaffected, rpm)
Other versions: affected 		CNA: redhat
Red Hat Update Infrastructure 5
Red Hat
rhui5/haproxy-rhel9
https://catalog.redhat.com/software/containers/ 		≥ 1786533449; < * (unaffected, rpm)
Other versions: affected 		CNA: redhat
Red Hat Update Infrastructure 5
Red Hat
rhui5/installer-rhel9
https://catalog.redhat.com/software/containers/ 		≥ 1786435483; < * (unaffected, rpm)
Other versions: affected 		CNA: redhat
Red Hat Update Infrastructure 5
Red Hat
rhui5/rhua-rhel9
https://catalog.redhat.com/software/containers/ 		≥ 1786533529; < * (unaffected, rpm)
Other versions: affected 		CNA: redhat
Red Hat Update Infrastructure 5
Red Hat
rhui5/cds-kubernetes-tp-rhel9
https://catalog.redhat.com/software/containers/ 		≥ 1787241211; < * (unaffected, rpm)
Other versions: affected 		CNA: redhat
Red Hat Update Infrastructure 5
Red Hat
rhui5/installer-tp-rhel9
https://catalog.redhat.com/software/containers/ 		≥ 1787135742; < * (unaffected, rpm)
Other versions: affected 		CNA: redhat
Red Hat Update Infrastructure 5
Red Hat
rhui5/rhua-tp-rhel9
https://catalog.redhat.com/software/containers/ 		≥ 1787241260; < * (unaffected, rpm)
Other versions: affected 		CNA: redhat
Red Hat Enterprise Linux 6
Red Hat
p11-kit
https://access.redhat.com/downloads/content/package-browser/ 		Range not reported
Other versions: affected 		CNA: redhat
Red Hat Enterprise Linux 7
Red Hat
p11-kit
https://access.redhat.com/downloads/content/package-browser/ 		Range not reported
Other versions: affected 		CNA: redhat
Red Hat Enterprise Linux 8
Red Hat
p11-kit
https://access.redhat.com/downloads/content/package-browser/ 		Range not reported
Other versions: affected 		CNA: redhat
Red Hat OpenShift AI (RHOAI)
Red Hat
rhoai/odh-llama-stack-k8s-operator-rhel9
https://access.redhat.com/downloads/content/package-browser/ 		Range not reported
Other versions: unaffected 		CNA: redhat
Red Hat OpenShift Container Platform 4
Red Hat
openshift/ose-rhel-coreos-8
https://access.redhat.com/downloads/content/package-browser/ 		Range not reported
Other versions: affected 		CNA: redhat
Red Hat OpenShift Container Platform 4
Red Hat
openshift/ose-rhel-coreos-9
https://access.redhat.com/downloads/content/package-browser/ 		Range not reported
Other versions: affected 		CNA: redhat
Red Hat OpenShift Container Platform 5
Red Hat
openshift/ose-rhel-coreos-9
https://access.redhat.com/downloads/content/package-browser/ 		Range not reported
Other versions: affected 		CNA: redhat

Version ranges are source assertions. Check the vendor advisory and your installed configuration before determining exposure.

NVD applicability configurations (2)

These expressions retain AND/OR operators, negation, and required environmental products. A listed product is not sufficient to establish exposure when additional conditions apply.

[
  {
    "negate": false,
    "nodes": [
      {
        "cpeMatch": [
          {
            "criteria": "cpe:2.3:a:redhat:hardened_images:-:*:*:*:*:*:*:*",
            "vulnerable": true
          },
          {
            "criteria": "cpe:2.3:a:redhat:openshift_container_platform:*:*:*:*:*:*:*:*",
            "versionEndIncluding": "4.22.1",
            "versionStartIncluding": "4.0",
            "vulnerable": true
          },
          {
            "criteria": "cpe:2.3:o:redhat:enterprise_linux:6.0:*:*:*:*:*:*:*",
            "vulnerable": true
          },
          {
            "criteria": "cpe:2.3:o:redhat:enterprise_linux:7.0:*:*:*:*:*:*:*",
            "vulnerable": true
          },
          {
            "criteria": "cpe:2.3:o:redhat:enterprise_linux:8.0:*:*:*:*:*:*:*",
            "vulnerable": true
          },
          {
            "criteria": "cpe:2.3:o:redhat:enterprise_linux:9.0:*:*:*:*:*:*:*",
            "vulnerable": true
          },
          {
            "criteria": "cpe:2.3:o:redhat:enterprise_linux:10.0:*:*:*:*:*:*:*",
            "vulnerable": true
          }
        ],
        "negate": false,
        "operator": "OR"
      }
    ],
    "operator": "OR"
  },
  {
    "negate": false,
    "nodes": [
      {
        "cpeMatch": [
          {
            "criteria": "cpe:2.3:a:p11-kit_project:p11-kit:-:*:*:*:*:*:*:*",
            "vulnerable": true
          }
        ],
        "negate": false,
        "operator": "OR"
      }
    ],
    "operator": "OR"
  }
]

CVSS assessments

Version / scoreVectorAuthority
3.1 / 6.2
medium		 CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:HCNA: redhat
3.1 / 6.2
medium		 CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:HNVD: [email protected]

Exploit evidence

No exploit evidence in collected sources. This is not proof of no exploitation.

References

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