{"id":"CVE-2026-98949","revision":"581c15ef5b3f4504b820a38033be985f","records":[{"revision":"581c15ef5b3f4504b820a38033be985f","observedAt":"2026-10-23T16:01:20.601+00:00","statement":{"source":"cve-program","id":"CVE-2026-98949","aliases":[],"title":"drm/imagination: Fix reference and vm_bo handling in remap()","description":"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->gpuvm_bo, the new object's\n  vm_bo:\n\n    prev_va --obj--> BO_A          BO_B <--obj-- vm_bo (ctx->gpuvm_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->obj)\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->remap.unmap->va->vm_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.","state":0,"publishedAt":"2026-10-23T12:19:08.946+00:00","modifiedAt":"2026-10-23T12:19:08.946+00:00","affected":[{"ecosystem":"Vendor product","name":"Linux","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"product\": \"Linux\",\n                    \"vendor\": \"Linux\",\n                    \"defaultStatus\": \"unaffected\",\n                    \"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\n                    \"programFiles\": [\n                        \"drivers/gpu/drm/imagination/pvr_vm.c\"\n                    ],\n                    \"versions\": [\n                        {\n                            \"version\": \"ff5f643de0bf27874c4033cd57a0bd034b5c7d11\",\n                            \"lessThan\": \"521cf8403a185a9d5790fe324bb43ba7ea85f51c\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"ff5f643de0bf27874c4033cd57a0bd034b5c7d11\",\n                            \"lessThan\": \"9caa2eca5cc8372517ff36a83f321d4326abae93\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"ff5f643de0bf27874c4033cd57a0bd034b5c7d11\",\n                            \"lessThan\": \"784356aa88b82035d70e9faeded49b70cddeb29e\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"ff5f643de0bf27874c4033cd57a0bd034b5c7d11\",\n                            \"lessThan\": \"196d4d10c1b33ae176685ff42a9994a5952b1d0f\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        }\n                    ]\n                }"},{"ecosystem":"Vendor product","name":"Linux","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"product\": \"Linux\",\n                    \"vendor\": \"Linux\",\n                    \"defaultStatus\": \"affected\",\n                    \"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\n                    \"programFiles\": [\n                        \"drivers/gpu/drm/imagination/pvr_vm.c\"\n                    ],\n                    \"versions\": [\n                        {\n                            \"version\": \"6.8\",\n                            \"status\": \"affected\"\n                        },\n                        {\n                            \"version\": \"0\",\n                            \"lessThan\": \"6.8\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.12.113\",\n                            \"lessThanOrEqual\": \"6.12.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.18.57\",\n                            \"lessThanOrEqual\": \"6.18.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"7.2.11\",\n                            \"lessThanOrEqual\": \"7.2.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"7.3\",\n                            \"lessThanOrEqual\": \"*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"original_commit_for_fix\"\n                        }\n                    ]\n                }"}],"metrics":[],"references":["https://git.kernel.org/stable/c/521cf8403a185a9d5790fe324bb43ba7ea85f51c","https://git.kernel.org/stable/c/9caa2eca5cc8372517ff36a83f321d4326abae93","https://git.kernel.org/stable/c/784356aa88b82035d70e9faeded49b70cddeb29e","https://git.kernel.org/stable/c/196d4d10c1b33ae176685ff42a9994a5952b1d0f"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-98949","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-98949","identifiers":["CVE-2026-98949"]},"retained":false,"historicalAffected":[]}],"coverage":[]}