{"id":"CVE-2023-6240","title":"Kernel: marvin vulnerability side-channel leakage in the rsa decryption operation","summary":"A Marvin vulnerability side-channel leakage was found in the RSA decryption operation in the Linux Kernel. This issue may allow a network attacker to decrypt ciphertexts or forge signatures, limiting the services that use that private key.","severity":"medium","cvss":6.5,"cvssVector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:L/A:N","cvssSource":"cna","cwe":["CWE-203"],"vendor":"Red Hat","product":"kernel-rt","affected":["kernel-rt (all versions)","kernel (all versions)","kernel (all versions)","kernel (all versions)","kernel (all versions)","kernel-rt (all versions)","kernel (all versions)","kernel-rt (all versions)","kernel","kernel","kernel-rt","kernel-rt (all versions)"],"ssvc":{"exploitation":"poc","automatable":"no","technicalImpact":"partial","timestamp":"2024-11-07T21:11:40.911308Z"},"exploitAvailable":true,"published":"2024-02-04","updated":"2026-11-05","sourceUpdated":"2026-11-05T11:36:51.130Z","source":"CVEORG","sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2023-6240","references":[{"url":"https://access.redhat.com/errata/RHSA-2024:1881","label":"RHSA-2024:1881"},{"url":"https://access.redhat.com/errata/RHSA-2024:1882","label":"RHSA-2024:1882"},{"url":"https://access.redhat.com/errata/RHSA-2024:2758","label":"RHSA-2024:2758"},{"url":"https://access.redhat.com/errata/RHSA-2024:3414","label":"RHSA-2024:3414"},{"url":"https://access.redhat.com/errata/RHSA-2024:3421","label":"RHSA-2024:3421"},{"url":"https://access.redhat.com/errata/RHSA-2024:3618","label":"RHSA-2024:3618"},{"url":"https://access.redhat.com/errata/RHSA-2024:3627","label":"RHSA-2024:3627"},{"url":"https://access.redhat.com/security/cve/CVE-2023-6240"},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2250843","label":"RHBZ#2250843"},{"url":"https://people.redhat.com/~hkario/marvin/"},{"url":"https://securitypitfalls.wordpress.com/2023/10/16/experiment-with-side-channel-attacks-yourself/"}],"tags":["cve.org","exploit-available"],"epss":0.00969,"epssPercentile":0.61957,"ingestedAt":"2026-11-05T21:36:00.805Z","slug":"CVE-2023-6240","body":"## Overview\n\nA Marvin vulnerability side-channel leakage was found in the RSA decryption operation in the Linux Kernel. This issue may allow a network attacker to decrypt ciphertexts or forge signatures, limiting the services that use that private key.\n\n## Affected\n\n- `kernel-rt (all versions)`\n- `kernel (all versions)`\n- `kernel (all versions)`\n- `kernel (all versions)`\n- `kernel (all versions)`\n- `kernel-rt (all versions)`\n- `kernel (all versions)`\n- `kernel-rt (all versions)`\n- `kernel`\n- `kernel`\n- `kernel-rt`\n- `kernel-rt (all versions)`\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"twilight","depthScore":48,"depthScoreParts":{"impact":35.8,"likelihood":0.2,"exploitation":12,"ransomware":0},"changes":[]}