{"apiVersion":"1.0","identifier":"CVE-2026-99209","description":"In the Linux kernel, the following vulnerability has been resolved: drm/xe: skip eviction of a BO with no resource xe_evict_flags() switches on tbo->resource->mem_type to choose an eviction placement. An xe BO can reach eviction with no ttm.resource, e.g. an imported dma-buf BO whose resource was freed during teardown while its attachment is still live: the exporter then invalidates it via xe_dma_buf_move_notify() -> xe_bo_evict(), and the switch dereferences a NULL resource and faults. A BO with no resource has nothing placed or mapped, so there is nothing to evict. Return an empty placement (num_placement = 0), mirroring the handling already used for non-xe scatter-gather BOs just above; ttm_bo_validate() then takes the pipeline-gutting path and returns 0. Without the fix the xe_dma_buf@xe_test_dmabuf_move_notify_no_resource dynamic live selftest will fail with below stack. BUG: kernel NULL pointer dereference, address: 0000000000000010 RIP: 0010:xe_evict_flags+0xf4/0x140 [xe] Call Trace: <TASK> xe_bo_evict+0x40/0xa0 [xe] ? ttm_bo_pipeline_gutting+0x71/0x180 [ttm] xe_test_dmabuf_move_notify_no_resource+0x182/0x440 [xe] xe_dma_buf_kunit+0x387/0x580 [xe] v2: Add Fixes tag and failure info in commit text (Matt Brost) (cherry picked from commit dbcfaac6331f1fcb0c2fe3ad3e9adb1e5d43ec0c)","publishedAt":"2026-10-28T11:17:42","lastModifiedAt":"2026-10-28T11:17:42","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-99209","cvssScore":null,"cvssVector":null,"epssProbability":0.00155,"riskScore":null,"affectedProduct":"Linux kernel","affectedVersions":"unknown","vulnerabilityType":"Kernel","operatingSystems":[],"links":{"self":"https://www.redsauce.net/api/cves/CVE-2026-99209","webPages":{"es":"https://www.redsauce.net/es/cves/CVE-2026-99209","en":"https://www.redsauce.net/en/cves/CVE-2026-99209","fr":"https://www.redsauce.net/fr/cves/CVE-2026-99209","pt":"https://www.redsauce.net/pt/cves/CVE-2026-99209","de":"https://www.redsauce.net/de/cves/CVE-2026-99209","sk":"https://www.redsauce.net/sk/cves/CVE-2026-99209","el":"https://www.redsauce.net/el/cves/CVE-2026-99209"},"source":"https://nvd.nist.gov/vuln/detail/CVE-2026-99209"}}