CVE-2026-68260

CVE CVE-2026-68260EUVD EUVD-2026-55361Published 2026-08-10T12:01:34.000Z

What the advisory describes

In the Linux kernel, the following vulnerability has been resolved: drm/imagination: acquire vm_ctx->lock before mapping memory to GPU VM The drm gpuvm code doesn't protect find operation against map operation, and the driver needs to ensure a map operation shouldn't happen when a find operation is in progress. In some cases a find operation will be in progress when doing map/unmap operations, and the find operation will do a NULL pointer dereference. An example of the stack trace of such NULL dereference is shown below: ``` Unable to handle kernel access to user memory without uaccess routines at virtual address 0000000000000010 [<ffffffff01e989d4>] drm_gpuva_find+0x28/0x6c [drm_gpuvm] [<ffffffff01ed3a40>] pvr_vm_unmap+0x34/0x68 [powervr] [<ffffffff01ec69da>] pvr_ioctl_vm_unmap+0x2e/0x50 [powervr] [<ffffffff8080ce0a>] drm_ioctl_kernel+0x8e/0xdc [<ffffffff8080d016>] drm_ioctl+0x1be/0x3e0 [<ffffffff802bec3e>] __riscv_sys_ioctl+0xba/0xc4 [<ffffffff80d858b2>] do_trap_ecall_u+0x23e/0x3f4 [<ffffffff80d92288>] handle_exception+0x168/0x174 ``` As all occurences of drm_gpuva_find*() are already guarded by vm_ctx->lock, make pvr_vm_map() to acquire this lock to prevent disturbing any find operation. This fixes the NULL deference problem in drm_gpuva_find*().

Source: EUVD (ENISA), in the words of the advisory.

Products the advisory names

These come from the advisory itself, not from any check we performed.

Linux — Linux 6.8; patch: 6.12.101; ff5f643de0bf27874c4033cd57a0bd034b5c7d11 <15f58d44c24477a6ebffa44ec05207b81cfa55d9; patch: 7.1.6; patch: 6.18.42; patch: 0; ff5f643de0bf27874c4033cd57a0bd034b5c7d11 <17e2030f37600994440f875dc410615d5c66ee6d; patch: 7.2-rc5; ff5f643de0bf27874c4033cd57a0bd034b5c7d11 <6253bb56bb2ebdf317d8b599ce737a2510cc2e17; ff5f643de0bf27874c4033cd57a0bd034b5c7d11 <1f1f2618e44b21a7d4eb30d3bbd7e015ffbbbadf

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Carried in the product catalogue

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Linux — Linux

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