{"cve":"CVE-2026-68260","nvd":{"published":"2026-08-10T13:20:14.720","modified":"2026-08-17T05:18:28.340","status":"Received","description":"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*().","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","score":7.8},"cwes":[],"references":["https://git.kernel.org/stable/c/15f58d44c24477a6ebffa44ec05207b81cfa55d9","https://git.kernel.org/stable/c/17e2030f37600994440f875dc410615d5c66ee6d","https://git.kernel.org/stable/c/1f1f2618e44b21a7d4eb30d3bbd7e015ffbbbadf","https://git.kernel.org/stable/c/6253bb56bb2ebdf317d8b599ce737a2510cc2e17"],"products":[],"source":"nvd","synced_at":"2026-10-19T22:47:54.990491175+00:00"},"epss":{"cve":"CVE-2026-68260","score":0.00163,"percentile":0.05536,"date":"2026-10-31"},"kev":null,"osv":[],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}