{"id":"CVE-2020-25639","title":"A NULL pointer dereference flaw was found in the Linux kernel's GPU Nouveau driver functionality in versions prior to 5.12-rc1 in the way the user calls ioctl DRM_IOCTL_NOUVEAU_CHANNEL_ALLOC","summary":"A NULL pointer dereference flaw was found in the Linux kernel's GPU Nouveau driver functionality in versions prior to 5.12-rc1 in the way the user calls ioctl DRM_IOCTL_NOUVEAU_CHANNEL_ALLOC. This flaw allows a local user to crash the sy…","severity":"medium","cvss":4.4,"cvssVector":"CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H","cwe":["CWE-476"],"vendor":"redhat","product":"openshift_container_platform","affected":["linux_kernel <= 5.11.2","fedora = 32","fedora = 33","openshift_container_platform = 4.4","openshift_container_platform = 4.5","openshift_container_platform = 4.6","enterprise_linux = 5.0","enterprise_linux = 6.0","enterprise_linux = 7.0","enterprise_linux = 8.0","messaging_realtime_grid = 2.0"],"published":"2021-03-04","updated":"2026-10-08","sourceUpdated":"2026-10-08T21:17:26.640","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2020-25639","references":[{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=1876995","label":"secalert@redhat.com"},{"url":"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/HE4CT3NL6OEBRRBUKHIX63GLNVOWCVRW/","label":"secalert@redhat.com"},{"url":"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/SUCBCKRHWP3UD2AVVYQJE7BIJEMCMXW5/","label":"secalert@redhat.com"},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=1876995","label":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/HE4CT3NL6OEBRRBUKHIX63GLNVOWCVRW/","label":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/SUCBCKRHWP3UD2AVVYQJE7BIJEMCMXW5/","label":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://security.access.redhat.com/data/csaf/v2/vex/2020/cve-2020-25639.json"},{"url":"https://access.redhat.com/security/cve/CVE-2020-25639"},{"url":"https://www.cve.org/CVERecord?id=CVE-2020-25639"},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2020-25639"}],"tags":["nvd","csaf","vex","red-hat","cve.org"],"epss":0.00366,"epssPercentile":0.30266,"ingestedAt":"2026-10-08T22:11:53.726Z","ssvc":{"exploitation":"none","automatable":"no","technicalImpact":"partial","timestamp":"2026-10-08T21:00:16.850188Z"},"slug":"CVE-2020-25639","body":"## Overview\n\nA NULL pointer dereference flaw was found in the Linux kernel's GPU Nouveau driver functionality in versions prior to 5.12-rc1 in the way the user calls ioctl DRM_IOCTL_NOUVEAU_CHANNEL_ALLOC. This flaw allows a local user to crash the system.\n\n## Affected\n\n- `linux_kernel <= 5.11.2`\n- `fedora = 32`\n- `fedora = 33`\n- `openshift_container_platform = 4.4`\n- `openshift_container_platform = 4.5`\n- `openshift_container_platform = 4.6`\n- `enterprise_linux = 5.0`\n- `enterprise_linux = 6.0`\n- `enterprise_linux = 7.0`\n- `enterprise_linux = 8.0`\n- `messaging_realtime_grid = 2.0`\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.\n\n## Vendor advisories\n\n- **Red Hat VEX** · Low · affected: Red Hat Enterprise Linux 8 · no fix planned: Red Hat Enterprise Linux 8 · updated 2026-10-08 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2020/cve-2020-25639.json)","depth":"sunlit","depthScore":24,"depthScoreParts":{"impact":24.2,"likelihood":0.1,"exploitation":0,"ransomware":0},"changes":[]}