{"id":"CVE-2026-43280","summary":"drm/xe: Add bounds check on pat_index to prevent OOB kernel read in madvise","details":"In the Linux kernel, the following vulnerability has been resolved:\n\ndrm/xe: Add bounds check on pat_index to prevent OOB kernel read in madvise\n\nWhen user provides a bogus pat_index value through the madvise IOCTL, the\nxe_pat_index_get_coh_mode() function performs an array access without\nvalidating bounds. This allows a malicious user to trigger an out-of-bounds\nkernel read from the xe-\u003epat.table array.\n\nThe vulnerability exists because the validation in madvise_args_are_sane()\ndirectly calls xe_pat_index_get_coh_mode(xe, args-\u003epat_index.val) without\nfirst checking if pat_index is within [0, xe-\u003epat.n_entries).\n\nAlthough xe_pat_index_get_coh_mode() has a WARN_ON to catch this in debug\nbuilds, it still performs the unsafe array access in production kernels.\n\nv2(Matthew Auld)\n- Using array_index_nospec() to mitigate spectre attacks when the value\nis used\n\nv3(Matthew Auld)\n- Put the declarations at the start of the block\n\n(cherry picked from commit 944a3329b05510d55c69c2ef455136e2fc02de29)","modified":"2026-05-28T03:54:31.171538786Z","published":"2026-05-06T11:29:01.562Z","database_specific":{"cna_assigner":"Linux","osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/43xxx/CVE-2026-43280.json"},"references":[{"type":"WEB","url":"https://git.kernel.org/stable/c/79f52655567a6471ff3d0d6325ede91bb14461f4"},{"type":"WEB","url":"https://git.kernel.org/stable/c/fbbe32618e97eff81577a01eb7d9adcd64a216d7"},{"type":"WEB","url":"https://git.kernel.org/stable/c/ffba51100ff61792fefbae11ca38ac1987a818dd"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/43xxx/CVE-2026-43280.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-43280"},{"type":"PACKAGE","url":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"ada7486c5668db542a7d361268df931aca5b726a"},{"fixed":"ffba51100ff61792fefbae11ca38ac1987a818dd"},{"fixed":"79f52655567a6471ff3d0d6325ede91bb14461f4"},{"fixed":"fbbe32618e97eff81577a01eb7d9adcd64a216d7"}]}],"database_specific":{"source":"https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2026-43280.json"}},{"package":{"name":"Kernel","ecosystem":"Linux"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"6.18.0"},{"fixed":"6.18.16"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.19.0"},{"fixed":"6.19.6"}]}],"database_specific":{"source":"https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2026-43280.json"}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H"}]}