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A remote attacker could exploit this vulnerability by calling the C_DeriveKey function on a remote token with specific IBM kyber or IBM btc derive mechanism parameters set to NULL. This could lead to the RPC-client attempting to return an uninitialized value, potentially resulting in a NULL dereference or undefined behavior. This issue may cause an application level denial of service or other unpredictable system states."}, {"lang": "es", "value": "Se encontr\u00f3 una falla en p11-kit. Un atacante remoto podr\u00eda explotar esta vulnerabilidad al llamar a la funci\u00f3n C_DeriveKey en un token remoto con par\u00e1metros espec\u00edficos del mecanismo de derivaci\u00f3n IBM kyber o IBM btc establecidos en NULL. Esto podr\u00eda llevar al cliente RPC intentando devolver un valor no inicializado, resultando potencialmente en una desreferencia NULL o comportamiento indefinido. Este problema puede causar una denegaci\u00f3n de servicio a nivel de aplicaci\u00f3n o a otros estados impredecibles del sistema."}], "id": "CVE-2026-2100", "lastModified": "2026-10-29T14:13:18.830", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "LOW", "baseScore": 5.3, "baseSeverity": "MEDIUM", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L", "version": "3.1"}, "exploitabilityScore": 3.9, "impactScore": 1.4, "source": "secalert@redhat.com", "type": "Secondary"}, {"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "baseScore": 7.5, "baseSeverity": "HIGH", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H", "version": "3.1"}, "exploitabilityScore": 3.9, "impactScore": 3.6, "source": "nvd@nist.gov", "type": "Primary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-2100", "options": [{"exploitation": "none"}, {"automatable": "yes"}, {"technicalImpact": "partial"}], "role": "CISA Coordinator", "timestamp": "2026-03-26T20:30:34.453809Z", "version": "2.0.3"}}]}, "published": "2026-03-26T21:17:04.247", "references": [{"source": "secalert@redhat.com", "tags": ["Vendor Advisory"], "url": "https://access.redhat.com/errata/RHSA-2026:18143"}, {"source": "secalert@redhat.com", "tags": ["Vendor Advisory"], "url": "https://access.redhat.com/errata/RHSA-2026:18599"}, {"source": "secalert@redhat.com", "tags": ["Vendor Advisory"], "url": "https://access.redhat.com/errata/RHSA-2026:21275"}, {"source": "secalert@redhat.com", "tags": ["Vendor Advisory"], "url": "https://access.redhat.com/errata/RHSA-2026:22634"}, {"source": "secalert@redhat.com", "tags": ["Vendor Advisory"], "url": "https://access.redhat.com/errata/RHSA-2026:27998"}, {"source": "secalert@redhat.com", "tags": ["Vendor Advisory"], "url": "https://access.redhat.com/errata/RHSA-2026:58981"}, {"source": "secalert@redhat.com", "tags": ["Vendor Advisory"], "url": "https://access.redhat.com/errata/RHSA-2026:7065"}, {"source": "secalert@redhat.com", "tags": ["Vendor Advisory"], "url": "https://access.redhat.com/errata/RHSA-2026:72502"}, {"source": "secalert@redhat.com", "tags": ["Vendor Advisory"], "url": "https://access.redhat.com/errata/RHSA-2026:82304"}, {"source": "secalert@redhat.com", "tags": ["Vendor Advisory"], "url": "https://access.redhat.com/errata/RHSA-2026:82322"}, {"source": "secalert@redhat.com", "tags": ["Vendor Advisory"], "url": "https://access.redhat.com/errata/RHSA-2026:82347"}, {"source": "secalert@redhat.com", "tags": ["Vendor Advisory"], "url": "https://access.redhat.com/errata/RHSA-2026:82354"}, {"source": "secalert@redhat.com", "tags": ["Vendor Advisory"], "url": "https://access.redhat.com/errata/RHSA-2026:82372"}, {"source": "secalert@redhat.com", "tags": ["Vendor Advisory"], "url": "https://access.redhat.com/errata/RHSA-2026:82857"}, {"source": "secalert@redhat.com", "tags": ["Vendor Advisory"], "url": "https://access.redhat.com/errata/RHSA-2026:82888"}, {"source": "secalert@redhat.com", "tags": ["Vendor Advisory"], "url": "https://access.redhat.com/security/cve/CVE-2026-2100"}, {"source": "secalert@redhat.com", "tags": ["Issue Tracking", "Vendor Advisory"], "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2437308"}, {"source": "secalert@redhat.com", "tags": ["Issue Tracking", "Patch"], "url": "https://github.com/p11-glue/p11-kit/pull/740"}, {"source": "secalert@redhat.com", "tags": ["Product", "Release Notes"], "url": "https://github.com/p11-glue/p11-kit/releases/tag/0.26.2"}], "sourceIdentifier": "secalert@redhat.com", "vulnStatus": "Analyzed", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-824"}], "source": "secalert@redhat.com", "type": "Secondary"}]}

{"acknowledgement": "This issue was discovered by Zoltan Fridrich (Red Hat).", "bugzilla": {"description": "p11-kit: p11-kit: NULL dereference via C_DeriveKey with specific NULL parameters", "id": "2437308", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2437308"}, "csaw": false, "cvss3": {"cvss3_base_score": "5.3", "cvss3_scoring_vector": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L", "status": "draft"}, "cwe": "CWE-824", "details": ["No description is available for this CVE."], "mitigation": {"lang": "en:us", "value": "Mitigation 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."}, "name": "CVE-2026-2100", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:10", "fix_state": "Fix deferred", "package_name": "p11-kit", "product_name": "Red Hat Enterprise Linux 10"}, {"cpe": "cpe:/o:redhat:enterprise_linux:6", "fix_state": "Not affected", "package_name": "p11-kit", "product_name": "Red Hat Enterprise Linux 6"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Not affected", "package_name": "p11-kit", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Not affected", "package_name": "p11-kit", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Fix deferred", "package_name": "p11-kit", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/a:redhat:openshift:4", "fix_state": "Not affected", "package_name": "rhcos", "product_name": "Red Hat OpenShift Container Platform 4"}], "public_date": "2026-02-06T08:08:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-2100\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-2100"], "statement": "This MODERATE impact flaw in p11-kit allows a remote attacker to cause an application level denial of service or unpredictable system states. Exploitation occurs when the C_DeriveKey function is called on a remote token with specific IBM kyber or IBM btc derive mechanism parameters set to NULL. This affects Red Hat Enterprise Linux 9.8 and 10.2, Fedora 42 and 43, and Red Hat In-Vehicle OS 2.0. Other Red Hat products, including OpenShift Container Platform and various RHEL versions, are not affected as the vulnerable code is not present.", "threat_severity": "Moderate"}

{"analysis": {"en": {"generated_at": "2026-04-15T16:40:56.845344+00:00", "value": {"mitigation_remediation": ["Update p11-kit to a version that includes the fix once it is released by Red\u00a0Hat.", "Add input validation to ensure that parameters passed to C_DeriveKey are not NULL before invoking the function.", "Restrict remote RPC token usage or isolate affected services to prevent exploitation and monitor for crashes or abnormal behavior."], "summary": {"action": "Apply Patch", "impact": "Denial of Service (application)"}, "threat_synthesis": {"affected_systems": "Red\u00a0Hat Enterprise Linux 10, 6, 7, 8, and 9; Red\u00a0Hat Hardened Images; Red\u00a0Hat OpenShift Container Platform\u00a04. Version details are not specified in the CNA data, so any installation that uses the affected p11-kit library is potentially impacted.", "description_and_impact": "A flaw in p11-kit allows a remote attacker to invoke the C_DeriveKey function on a remote token with specific IBM kyber or IBM btc derived mechanism parameters set to NULL. This can cause the RPC client to attempt to return an uninitialized value, potentially leading to a NULL dereference or other undefined behavior that may result in application\u2011level denial of service or unpredictable system states.", "risk_and_exploitability": "The vulnerability carries a CVSS score of 5.3, indicating moderate severity. EPSS is reported as < 1\u202f%, implying a very low probability of exploitation in the wild. The issue is not listed in the CISA Known Exploited Vulnerabilities catalog. The likely attack vector is a remote RPC call to a token that accepts the specific null parameters; an attacker would need remote access to the token\u2019s interface to trigger the vulnerability and cause denial of service or instability. This interpretation is inferred from the description and is not explicitly documented in the CVE data. No CNA workaround is available that meets Red\u00a0Hat\u2019s security criteria, so no suitable alternative exists."}}}}, "created": "2026-04-15T16:45:09.797199+00:00", "updated": "2026-04-15T16:45:09.797211+00:00", "vendors": []}