{"id":"CVE-2026-68260","summary":"drm/imagination: acquire vm_ctx-\u003elock before mapping memory to GPU VM","details":"In the Linux kernel, the following vulnerability has been resolved:\n\ndrm/imagination: acquire vm_ctx-\u003elock before mapping memory to GPU VM\n\nThe drm gpuvm code doesn't protect find operation against map operation,\nand the driver needs to ensure a map operation shouldn't happen when a\nfind operation is in progress.\n\nIn some cases a find operation will be in progress when doing map/unmap\noperations, and the find operation will do a NULL pointer dereference.\n\nAn example of the stack trace of such NULL dereference is shown below:\n\n```\nUnable to handle kernel access to user memory without uaccess routines at\nvirtual address 0000000000000010\n\n[\u003cffffffff01e989d4\u003e] drm_gpuva_find+0x28/0x6c [drm_gpuvm]\n[\u003cffffffff01ed3a40\u003e] pvr_vm_unmap+0x34/0x68 [powervr]\n[\u003cffffffff01ec69da\u003e] pvr_ioctl_vm_unmap+0x2e/0x50 [powervr]\n[\u003cffffffff8080ce0a\u003e] drm_ioctl_kernel+0x8e/0xdc\n[\u003cffffffff8080d016\u003e] drm_ioctl+0x1be/0x3e0\n[\u003cffffffff802bec3e\u003e] __riscv_sys_ioctl+0xba/0xc4\n[\u003cffffffff80d858b2\u003e] do_trap_ecall_u+0x23e/0x3f4\n[\u003cffffffff80d92288\u003e] handle_exception+0x168/0x174\n```\n\nAs all occurences of drm_gpuva_find*() are already guarded by\nvm_ctx-\u003elock, make pvr_vm_map() to acquire this lock to prevent\ndisturbing any find operation. This fixes the NULL deference problem in\ndrm_gpuva_find*().","modified":"2026-08-18T03:31:04.015631374Z","published":"2026-08-10T12:01:34.414Z","database_specific":{"cna_assigner":"Linux","osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/68xxx/CVE-2026-68260.json"},"references":[{"type":"WEB","url":"https://git.kernel.org/stable/c/15f58d44c24477a6ebffa44ec05207b81cfa55d9"},{"type":"WEB","url":"https://git.kernel.org/stable/c/17e2030f37600994440f875dc410615d5c66ee6d"},{"type":"WEB","url":"https://git.kernel.org/stable/c/1f1f2618e44b21a7d4eb30d3bbd7e015ffbbbadf"},{"type":"WEB","url":"https://git.kernel.org/stable/c/6253bb56bb2ebdf317d8b599ce737a2510cc2e17"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/68xxx/CVE-2026-68260.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-68260"},{"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":"ff5f643de0bf27874c4033cd57a0bd034b5c7d11"},{"fixed":"1f1f2618e44b21a7d4eb30d3bbd7e015ffbbbadf"},{"fixed":"6253bb56bb2ebdf317d8b599ce737a2510cc2e17"},{"fixed":"15f58d44c24477a6ebffa44ec05207b81cfa55d9"},{"fixed":"17e2030f37600994440f875dc410615d5c66ee6d"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-68260.json"}},{"package":{"name":"Kernel","ecosystem":"Linux"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"6.8.0"},{"fixed":"6.12.101"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.13.0"},{"fixed":"6.18.42"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.19.0"},{"fixed":"7.1.6"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-68260.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H"}]}