{"id":"CVE-2026-90409","title":"In the Linux kernel, the following vulnerability has been resolved:\n\ndrm/panthor: Add vm_bind region with kbo range overlap check\n\nWhen a VM is created, caller has to specify the range of the address space\ncarve-out set aside for mapping…","summary":"In the Linux kernel, the following vulnerability has been resolved:\n\ndrm/panthor: Add vm_bind region with kbo range overlap check\n\nWhen a VM is created, caller has to specify the range of the address space\ncarve-out set aside for mapping…","severity":"medium","vendor":"Linux","product":"Linux","affected":["Linux >= 647810ec247641eb5aec8caef818919a4518a0b1 < 761cf9c63274a5b711c3dc829601723215710d2d","Linux >= 647810ec247641eb5aec8caef818919a4518a0b1 < 985f5e12f3cdf43030e13c2bbd154913133b5c3f","Linux 6.10"],"published":"2026-09-17","updated":"2026-10-15","sourceUpdated":"2026-10-15T11:18:02.623","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-90409","references":[{"url":"https://git.kernel.org/stable/c/761cf9c63274a5b711c3dc829601723215710d2d","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/985f5e12f3cdf43030e13c2bbd154913133b5c3f","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/f2be47fa8e225968eb66863657143fe900ec4bca","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-90409.json"},{"url":"https://access.redhat.com/security/cve/CVE-2026-90409"},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2536230"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-90409"},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-90409"},{"url":"https://git.kernel.org/pub/scm/linux/security/vulns.git/plain/cve/published/2026/CVE-2026-90409.mbox"},{"url":"https://git.kernel.org/stable/c/276753aaad65e6f7dac7989a600c1c2d3a382c1a"}],"tags":["nvd","cve.org","csaf","vex","red-hat"],"epss":0.00209,"epssPercentile":0.10971,"ingestedAt":"2026-09-17T16:21:47.798Z","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-1285"],"slug":"CVE-2026-90409","body":"## Overview\n\nIn the Linux kernel, the following vulnerability has been resolved:\n\ndrm/panthor: Add vm_bind region with kbo range overlap check\n\nWhen a VM is created, caller has to specify the range of the address space\ncarve-out set aside for mapping kernel BO's. That means vm_bind mappings of\nUM-exposed BO's should not intersect with that region, but at the moment\nwe're not checking this.\n\nAt first, I thought of giving these values to drm_gpuvm_init() through its\nreserve_{offset, range} arguments, but it turns out that is meant for VM\naddress spans that are not managed through the usual drm_gpuvm split/merge\ncircuit, so storing the end of the user VA range at VM creation time and\ndoing a quick check in the vm_bind ioctl path was the simplest workaround.\n\nThe new check also makes sure vm_bind range doesn't overflow the size of a\n64-bit unsigned integer. That was already being done further down the call\nstack inside drm_gpuvm_sm_map -> drm_gpuvm_range_valid, but it's best to\nfail early in the driver before GPUVM functions are invoked so that we\nwon't waste time allocating vm_bind context resources.\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** · Moderate · updated 2026-10-20 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-90409.json)","depth":"sunlit","depthScore":30,"depthScoreParts":{"impact":30.3,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[{"seq":225599,"id":"CVE-2026-90409","ts":1792498311083,"field":"cvss","old":null,"new":"5.5"},{"seq":225598,"id":"CVE-2026-90409","ts":1792498311083,"field":"severity","old":"none","new":"medium"}]}