{"id":"CVE-2026-68260","aliases":[],"url":"https://o3.security/vulnerability/CVE-2026-68260","summary":"drm/imagination: acquire vm_ctx->lock before mapping memory to GPU VM","details":"In the Linux kernel, the following vulnerability has been resolved:\n\ndrm/imagination: acquire vm_ctx->lock 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[<ffffffff01e989d4>] drm_gpuva_find+0x28/0x6c [drm_gpuvm]\n[<ffffffff01ed3a40>] pvr_vm_unmap+0x34/0x68 [powervr]\n[<ffffffff01ec69da>] pvr_ioctl_vm_unmap+0x2e/0x50 [powervr]\n[<ffffffff8080ce0a>] drm_ioctl_kernel+0x8e/0xdc\n[<ffffffff8080d016>] drm_ioctl+0x1be/0x3e0\n[<ffffffff802bec3e>] __riscv_sys_ioctl+0xba/0xc4\n[<ffffffff80d858b2>] do_trap_ecall_u+0x23e/0x3f4\n[<ffffffff80d92288>] handle_exception+0x168/0x174\n```\n\nAs all occurences of drm_gpuva_find*() are already guarded by\nvm_ctx->lock, make pvr_vm_map() to acquire this lock to prevent\ndisturbing any find operation. This fixes the NULL deference problem in\ndrm_gpuva_find*().","published":"2026-08-10T12:01:34.414Z","modified":"2026-08-14T04:04:00.462575813Z","cvss":{"score":7.8,"severity":"HIGH","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H"},"epss":null,"cisaKev":null,"exploitsKnown":null,"affectedPackages":[{"ecosystem":"Linux","name":"Kernel","fixedVersion":"6.12.101"}],"fix":null,"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"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-08-14T04:04:00.462575813Z"}}