{
  "cveId": "CVE-2026-63880",
  "url": "https://patchblox.com/security/cve/CVE-2026-63880",
  "summary": "CVE-2026-63880 is fixed in linux on 1 platform by DEBIAN-CVE-2026-63880 (version 7.0.12-1), released July 20, 2026. It is not reported as exploited. Patch Radar priority: Routine.",
  "title": "linux: In the Linux kernel, the following vulnerability has been resolved:  drm/amdgpu: fix lock leak on ENOMEM in AMDGPU_GE...",
  "description": "In the Linux kernel, the following vulnerability has been resolved:  drm/amdgpu: fix lock leak on ENOMEM in AMDGPU_GEM_OP_GET_MAPPING_INFO  The AMDGPU_GEM_OP_GET_MAPPING_INFO branch of amdgpu_gem_op_ioctl() holds three cleanup-tracked resources before calling kvcalloc(): the drm_gem_object reference from drm_gem_object_lookup(), the drm_exec lock on the looked-up GEM via drm_exec_lock_obj(), and the drm_exec lock on the per-process VM root page directory via amdgpu_vm_lock_pd().  All three are released by the out_exec label that every other error path in this function jumps to. The kvcalloc() failure path returns -ENOMEM directly, skipping out_exec and leaking all three.  The leaked per-process VM root PD dma_resv lock is the load-bearing leak: any subsequent operation on the same VM (further GEM ops, command-submission, eviction, TTM shrinker callbacks) blocks on the held lock.  DRM_IOCTL_AMDGPU_GEM_OP is DRM_AUTH | DRM_RENDER_ALLOW, so this is an unprivileged-local denial of service against the caller\u0027s GPU context, reachable by any process with /dev/dri/renderD* access.  Route the failure through out_exec so drm_exec_fini() and drm_gem_object_put() run.  Reproduced on stock 7.0.0-10, Ryzen 7 5700U / Radeon Vega (Lucienne): the failing ioctl returns -ENOMEM and a second GET_MAPPING_INFO on the same fd then blocks in drm_exec_lock_obj() on the leaked dma_resv.  SIGKILL on the caller does not reap the task; the fd-release path during process exit goes through amdgpu_gem_object_close() -\u003E drm_exec_prepare_obj() on the same lock, leaving the task in D state until the box is rebooted.  The patched kernel was not rebuilt and re-tested on this hardware; the fix is mechanical. Tested on a single Lucienne / Vega box only.  Ziyi Guo posted an independent INT_MAX-bound check for args-\u003Enum_entries in the same branch [1]; the two patches are complementary and can land in either order.  (cherry picked from commit b69d3256d79de15f54c322986ff4da68f1d65b0a)",
  "published": "2026-07-19T16:17:05Z",
  "severity": "medium",
  "cvss": 5.5,
  "cvssVector": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
  "epss": 0.00124,
  "epssPercentile": 0.02119,
  "priority": "Routine",
  "priorityTier": 4,
  "exploited": false,
  "vendorExploited": false,
  "disclosed": false,
  "fixes": [
    {
      "platform": "linux",
      "product": "linux",
      "release": "Debian 14",
      "fixedVersion": "7.0.12-1",
      "fix": "DEBIAN-CVE-2026-63880",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2026-63880",
      "released": "2026-07-20T12:58:36Z"
    }
  ],
  "noFixYet": [],
  "dataAsOf": "2026-11-09T19:38:12Z",
  "attribution": {
    "text": "Data: Patchblox Patch Radar",
    "url": "https://patchblox.com/security/patch-radar",
    "terms": "https://patchblox.com/security/patch-radar/use-the-data"
  }
}