{"schema":"threatline.record/2","record":{"id":"CVE-2026-98949","aliases":[],"summary":"drm/imagination: Fix reference and vm_bo handling in remap()","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->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.","categories":["Operating systems"],"product":"Linux","vendor":"Linux","ecosystem":null,"affected_ranges":[{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-98949","source_modified_at":"2026-10-23T12:19:08.946Z","fetched_at":"2026-10-23T18:42:43.628194Z","product":"Linux","vendor":"Linux","versions":[{"version":"ff5f643de0bf27874c4033cd57a0bd034b5c7d11","lessThan":"521cf8403a185a9d5790fe324bb43ba7ea85f51c","status":"affected","versionType":"git"},{"version":"ff5f643de0bf27874c4033cd57a0bd034b5c7d11","lessThan":"9caa2eca5cc8372517ff36a83f321d4326abae93","status":"affected","versionType":"git"},{"version":"ff5f643de0bf27874c4033cd57a0bd034b5c7d11","lessThan":"784356aa88b82035d70e9faeded49b70cddeb29e","status":"affected","versionType":"git"},{"version":"ff5f643de0bf27874c4033cd57a0bd034b5c7d11","lessThan":"196d4d10c1b33ae176685ff42a9994a5952b1d0f","status":"affected","versionType":"git"}],"defaultStatus":"unaffected"},{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-98949","source_modified_at":"2026-10-23T12:19:08.946Z","fetched_at":"2026-10-23T18:42:43.628194Z","product":"Linux","vendor":"Linux","versions":[{"version":"6.8","status":"affected"},{"version":"0","lessThan":"6.8","status":"unaffected","versionType":"semver"},{"version":"6.12.113","lessThanOrEqual":"6.12.*","status":"unaffected","versionType":"semver"},{"version":"6.18.57","lessThanOrEqual":"6.18.*","status":"unaffected","versionType":"semver"},{"version":"7.2.11","lessThanOrEqual":"7.2.*","status":"unaffected","versionType":"semver"},{"version":"7.3","lessThanOrEqual":"*","status":"unaffected","versionType":"original_commit_for_fix"}],"defaultStatus":"affected"}],"fixed_versions":[{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-98949","source_modified_at":"2026-10-23T12:19:08.946Z","fetched_at":"2026-10-23T18:42:43.628194Z","package":{"name":"Linux","ecosystem":null},"version":"521cf8403a185a9d5790fe324bb43ba7ea85f51c","basis":"first unaffected version stated in the CVE record"},{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-98949","source_modified_at":"2026-10-23T12:19:08.946Z","fetched_at":"2026-10-23T18:42:43.628194Z","package":{"name":"Linux","ecosystem":null},"version":"9caa2eca5cc8372517ff36a83f321d4326abae93","basis":"first unaffected version stated in the CVE record"},{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-98949","source_modified_at":"2026-10-23T12:19:08.946Z","fetched_at":"2026-10-23T18:42:43.628194Z","package":{"name":"Linux","ecosystem":null},"version":"784356aa88b82035d70e9faeded49b70cddeb29e","basis":"first unaffected version stated in the CVE record"},{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-98949","source_modified_at":"2026-10-23T12:19:08.946Z","fetched_at":"2026-10-23T18:42:43.628194Z","package":{"name":"Linux","ecosystem":null},"version":"196d4d10c1b33ae176685ff42a9994a5952b1d0f","basis":"first unaffected version stated in the CVE record"}],"cvss":null,"severity":null,"kev":{"listed":false},"epss":{"probability":null,"percentile":null,"score_date":null},"published_at":"2026-10-23T12:19:08.946Z","modified_at":"2026-10-23T12:19:08.946Z","provenance":[{"source":"CVE List","url":"https://www.cve.org/CVERecord?id=CVE-2026-98949","fetched_at":"2026-10-23T18:42:43.628194Z","source_modified_at":"2026-10-23T12:19:08.946Z"}],"sources":["CVE List"],"references":[{"source":"CVE List","url":"https://git.kernel.org/stable/c/521cf8403a185a9d5790fe324bb43ba7ea85f51c"},{"source":"CVE List","url":"https://git.kernel.org/stable/c/9caa2eca5cc8372517ff36a83f321d4326abae93"},{"source":"CVE List","url":"https://git.kernel.org/stable/c/784356aa88b82035d70e9faeded49b70cddeb29e"},{"source":"CVE List","url":"https://git.kernel.org/stable/c/196d4d10c1b33ae176685ff42a9994a5952b1d0f"}],"locations":[],"motoko_assessment":{"status":"requires_architecture_review","automatic_remediation":false},"cve_state":"PUBLISHED","classification":{"method":"product-first software-layer rules","rules_version":"2.1","matched_on":"product","confidence":"heuristic","reviewed":false},"change_timestamp":"2026-10-23T12:19:08.946Z","content_hash":"076489e98184f2e77f34986b71f45f3e89336f09d96d72657295c3250e411d1a"}}