{"id":"CVE-2026-98180","revision":"93c50abc6f1345248b6b05bda941517d","records":[{"revision":"93c50abc6f1345248b6b05bda941517d","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2026-98180","aliases":[],"title":"drm/msm: RCU-free the scheduler-containing ring and VM objects","description":"In the Linux kernel, the following vulnerability has been resolved:\n\ndrm/msm: RCU-free the scheduler-containing ring and VM objects\n\nBoth struct msm_ringbuffer and struct msm_gem_vm embed a struct\ndrm_gpu_scheduler.  msm_ringbuffer_destroy() and the VM free callback\nmsm_gem_vm_free() call drm_sched_fini() on the embedded scheduler and then\nfree the containing object with plain kfree().\n\ndrm_sched_fence_get_timeline_name() returns fence->sched->name, and the\nscheduler fence keeps a .release callback so it is not ops-detached on\nsignalling.  A finished fence exported to userspace (the submit out-fence, or\na VM_BIND fence, via sync_file / drm_syncobj) keeps pointing at the embedded\nscheduler after the ring/VM is freed, so a later get_timeline_name() --\nreachable unprivileged through SYNC_IOC_FILE_INFO -- dereferences freed slab\nmemory (KASAN slab-use-after-free read).\n\nPer the dma-fence lifetime contract the exporter must keep the data backing a\nsignalled fence alive for an RCU grace period.  Free the scheduler-containing\nobjects with kfree_rcu() instead of kfree().\n\nPatchwork: https://patchwork.freedesktop.org/patch/750234/","state":0,"publishedAt":"2026-10-06T08:44:23.327+00:00","modifiedAt":"2026-10-19T09:15:11.54+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/msm/msm_gem.h\",\n                        \"drivers/gpu/drm/msm/msm_gem_vma.c\",\n                        \"drivers/gpu/drm/msm/msm_ringbuffer.c\",\n                        \"drivers/gpu/drm/msm/msm_ringbuffer.h\"\n                    ],\n                    \"versions\": [\n                        {\n                            \"version\": \"1d8a5ca436ee4a28eec14cb813f790f7cdeeee19\",\n                            \"lessThan\": \"d81bf4581903b0cba0698cd4d1c07fc6be21754a\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"1d8a5ca436ee4a28eec14cb813f790f7cdeeee19\",\n                            \"lessThan\": \"713abac5c04ccbae67f9ac68c3921845535388e7\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"1d8a5ca436ee4a28eec14cb813f790f7cdeeee19\",\n                            \"lessThan\": \"01c8d1f385f788f1bbbbb7687c4386d614281218\",\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/msm/msm_gem.h\",\n                        \"drivers/gpu/drm/msm/msm_gem_vma.c\",\n                        \"drivers/gpu/drm/msm/msm_ringbuffer.c\",\n                        \"drivers/gpu/drm/msm/msm_ringbuffer.h\"\n                    ],\n                    \"versions\": [\n                        {\n                            \"version\": \"5.15\",\n                            \"status\": \"affected\"\n                        },\n                        {\n                            \"version\": \"0\",\n                            \"lessThan\": \"5.15\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.18.54\",\n                            \"lessThanOrEqual\": \"6.18.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"7.2.8\",\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":[{"system":"CVSS 3.1","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H","score":7.1,"severity":"HIGH"}],"references":["https://git.kernel.org/stable/c/d81bf4581903b0cba0698cd4d1c07fc6be21754a","https://git.kernel.org/stable/c/713abac5c04ccbae67f9ac68c3921845535388e7","https://git.kernel.org/stable/c/01c8d1f385f788f1bbbbb7687c4386d614281218"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-98180","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-98180","identifiers":["CVE-2026-98180"]},"retained":false,"historicalAffected":[]}],"coverage":[]}