{
  "affected": [
    {
      "ranges": [
        {
          "events": [
            {
              "introduced": "ff5f643de0bf27874c4033cd57a0bd034b5c7d11"
            },
            {
              "fixed": "521cf8403a185a9d5790fe324bb43ba7ea85f51c"
            },
            {
              "fixed": "9caa2eca5cc8372517ff36a83f321d4326abae93"
            },
            {
              "fixed": "784356aa88b82035d70e9faeded49b70cddeb29e"
            },
            {
              "fixed": "196d4d10c1b33ae176685ff42a9994a5952b1d0f"
            }
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "type": "GIT"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "Linux",
        "name": "Kernel"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "6.8.0"
            },
            {
              "fixed": "6.12.113"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.13.0"
            },
            {
              "fixed": "6.18.57"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.19.0"
            },
            {
              "fixed": "7.2.11"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "database_specific": {
    "cna_assigner": "Linux",
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/98xxx/CVE-2026-98949.json"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\ndrm/imagination: Fix reference and vm_bo handling in remap()\n\nWhen a map overlaps part of an existing mapping, pvr_vm_gpuva_remap()\nsplits the mapping into prev/next parts covering what the request did\nnot take, instead of creating something new. It gets two things wrong.\n\n- A GEM reference is taken for each part but it's never needed and never\n  dropped, so it leaks one reference per split (remap-next-in-2m in\n  tests/imagination/pvr_vm_map.c):\n\n    CRITICAL: 33558528 bytes of shmem still held after close\n\n- The parts still belong to the original object being split, but\n  pvr_vm_gpuva_remap() links them to ctx-\u003egpuvm_bo, the new object's\n  vm_bo:\n\n    prev_va --obj--\u003e BO_A          BO_B \u003c--obj-- vm_bo (ctx-\u003egpuvm_bo)\n            \\___________link___________/  (mismatch: BO_A != BO_B)\n\n  drm_gpuva_link() catches the mismatch:\n\n    WARNING: drivers/gpu/drm/drm_gpuvm.c:2108 at drm_gpuva_link+0x2ec/0x310\n      drm_WARN_ON(obj != vm_bo-\u003eobj)\n    Call trace:\n     drm_gpuva_link\n     pvr_vm_gpuva_remap\n     __drm_gpuvm_sm_map\n     pvr_vm_map\n     pvr_ioctl_vm_map\n\n  Link them to op-\u003eremap.unmap-\u003eva-\u003evm_bo instead.\n\nThe locking of the GPUVA lists of the other objects touched by a split is\nnot addressed here; it is handled by switching the GPUVM to immediate\nmode.",
  "id": "CVE-2026-98949",
  "modified": "2026-10-28T02:31:12.836647944Z",
  "published": "2026-10-23T12:19:08.946Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/196d4d10c1b33ae176685ff42a9994a5952b1d0f"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/521cf8403a185a9d5790fe324bb43ba7ea85f51c"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/784356aa88b82035d70e9faeded49b70cddeb29e"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/9caa2eca5cc8372517ff36a83f321d4326abae93"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/98xxx/CVE-2026-98949.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-98949"
    },
    {
      "type": "PACKAGE",
      "url": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"
    }
  ],
  "schema_version": "1.9.2",
  "summary": "drm/imagination: Fix reference and vm_bo handling in remap()"
}