{"id":"CVE-2026-98775","title":"kernel: nitro_enclaves: fix use-after-free on SLOT_ALLOC failure (CVE-2026-98775)","summary":"A flaw was found in the Linux kernel's Nitro Enclaves driver. An error-handling defect during enclave creation allows memory to be accessed after it has already been freed. A local attacker could exploit this use-after-free condition to ca…","severity":"medium","cvss":5.5,"cvssVector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","cvssSource":"vendor","cwe":"CWE-825","vendor":"Red Hat","product":"Red Hat Enterprise Linux 9","affected":["enterprise_linux 10","enterprise_linux 8","enterprise_linux 9","openshift_container_platform 4"],"published":"2026-10-18","updated":"2026-10-23","sourceUpdated":"2026-10-23T08:07:24+00:00","source":"CSAF","sourceUrl":"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-98775.json","references":[{"url":"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-98775.json"},{"url":"https://access.redhat.com/security/cve/CVE-2026-98775"},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2555087"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-98775"},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-98775"},{"url":"https://git.kernel.org/pub/scm/linux/security/vulns.git/plain/cve/published/2026/CVE-2026-98775.mbox"},{"url":"https://git.kernel.org/stable/c/8bde6f643ab6fe5e3e3f4c312f84ce327ecf39b2"},{"url":"https://git.kernel.org/stable/c/466041d14f26dc2babd606a2e85dce08774112a6"},{"url":"https://git.kernel.org/stable/c/f7fb6c2835ede1b8ad84cf7e78a528a9d0159b84"},{"url":"https://git.kernel.org/stable/c/43f78b328f3907ca2f7424e15b7e45ffbf9fe21c"},{"url":"https://git.kernel.org/stable/c/9bc184a2eda8b773c88ecbff934001ad649b9cc1"}],"tags":["csaf","vex","red-hat","cve.org"],"epss":0.00168,"epssPercentile":0.06032,"ingestedAt":"2026-10-18T16:47:32.491Z","slug":"CVE-2026-98775","body":"## Overview\n\nA flaw was found in the Linux kernel's Nitro Enclaves driver. An error-handling defect during enclave creation allows memory to be accessed after it has already been freed. A local attacker could exploit this use-after-free condition to cause a system crash, resulting in a Denial of Service (DoS), or potentially escalate privileges.\n\n## Vendor advisories\n\n- **Red Hat VEX** · Moderate · affected: Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 8, Red Hat Enterprise Linux 9, Red Hat OpenShift Container Platform 4 · no fix planned: Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 8, Red Hat Enterprise Linux 9, Red Hat OpenShift Container Platform 4 · updated 2026-10-23 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-98775.json)\n\n**kernel: nitro_enclaves: fix use-after-free on SLOT_ALLOC failure** — rated Moderate by Red Hat. Released 2026-10-18, updated 2026-10-23.\n\nAffected:\n\n- Red Hat Enterprise Linux 10\n- Red Hat Enterprise Linux 8\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 8\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\n## Remediation\n\nFix deferred","depth":"sunlit","depthScore":30,"depthScoreParts":{"impact":30.3,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[{"seq":228135,"id":"CVE-2026-98775","ts":1792758127734,"field":"cvss","old":null,"new":"5.5"},{"seq":228134,"id":"CVE-2026-98775","ts":1792758127734,"field":"severity","old":"none","new":"medium"}]}