{"id":"CVE-2026-98871","title":"kernel: crypto: ccp - Fix possible deadlock in SEV init failure path (CVE-2026-98871)","summary":"A flaw was found in the Linux kernel's AMD Cryptographic Coprocessor (CCP) driver. This vulnerability can lead to a Denial of Service (DoS) due to a deadlock during AMD Secure Encrypted Virtualization (SEV) platform initialization. When an…","severity":"medium","cvss":4.1,"cvssVector":"CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:U/C:N/I:N/A:H","cvssSource":"vendor","cwe":"CWE-764","vendor":"Red Hat","product":"Red Hat Enterprise Linux 9","affected":["enterprise_linux 10","enterprise_linux 9","openshift_container_platform 4"],"published":"2026-10-23","updated":"2026-10-26","sourceUpdated":"2026-10-26T11:01:42+00:00","source":"CSAF","sourceUrl":"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-98871.json","references":[{"url":"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-98871.json"},{"url":"https://access.redhat.com/security/cve/CVE-2026-98871"},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2559572"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-98871"},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-98871"},{"url":"https://git.kernel.org/pub/scm/linux/security/vulns.git/plain/cve/published/2026/CVE-2026-98871.mbox"},{"url":"https://git.kernel.org/stable/c/8e7e06ee7c2938ee3fa31a61cc5289a45c8c13f1"},{"url":"https://git.kernel.org/stable/c/ffd3a3df92be697eb78118a146c6a5d5e6c1f724"},{"url":"https://git.kernel.org/stable/c/364f3841bc22c72b6e2cb72a1e3c91c9c8fc1ef4"},{"url":"https://git.kernel.org/stable/c/b0e7ec0dab242c5e480121ba12400d0513e37ca2"}],"tags":["csaf","vex","red-hat","cve.org"],"epss":0.00168,"epssPercentile":0.06154,"ingestedAt":"2026-10-23T13:24:55.585Z","slug":"CVE-2026-98871","body":"## Overview\n\nA flaw was found in the Linux kernel's AMD Cryptographic Coprocessor (CCP) driver. This vulnerability can lead to a Denial of Service (DoS) due to a deadlock during AMD Secure Encrypted Virtualization (SEV) platform initialization. When an error occurs while configuring firmware memory, improper lock handling in the cleanup path causes the kernel to wait indefinitely on an already acquired lock. A local privileged user capable of triggering this initialization failure can exploit this flaw to hang the system.\n\n## Vendor advisories\n\n- **Red Hat VEX** · Moderate · affected: Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 9, Red Hat OpenShift Container Platform 4 · no fix planned: Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 9, Red Hat OpenShift Container Platform 4 · updated 2026-10-26 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-98871.json)\n\n**kernel: crypto: ccp - Fix possible deadlock in SEV init failure path** — rated Moderate by Red Hat. Released 2026-10-23, updated 2026-10-26.\n\nAffected:\n\n- Red Hat Enterprise Linux 10\n- Red Hat Enterprise Linux 9\n- Red Hat OpenShift Container Platform 4\n\nNo fix planned:\n\n- Red Hat Enterprise Linux 10\n- Red Hat Enterprise Linux 9\n- Red Hat OpenShift Container Platform 4\n\nNot affected:\n\n- Red Hat Enterprise Linux 6\n- Red Hat Enterprise Linux 7\n- Red Hat Enterprise Linux 8\n- Red Hat Enterprise Linux 9\n- Red Hat OpenShift Container Platform 4\n\n## Remediation\n\nFix deferred","depth":"sunlit","depthScore":23,"depthScoreParts":{"impact":22.5,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[{"seq":229320,"id":"CVE-2026-98871","ts":1793019683861,"field":"cvss","old":null,"new":"4.1"},{"seq":229319,"id":"CVE-2026-98871","ts":1793019683861,"field":"severity","old":"none","new":"medium"}]}