{
  "affected": [
    {
      "ranges": [
        {
          "events": [
            {
              "introduced": "2389fc1305fc1e2cf8b310a75463fefd3058bf48"
            },
            {
              "fixed": "fd4a4d0711f48a99b25bcd45e00eef8339eff82d"
            },
            {
              "fixed": "6404898af86d986db1dbbe06177c143e40652e49"
            },
            {
              "fixed": "796e77c14c4c1e2cd36473760fb6cc66c695eb47"
            },
            {
              "fixed": "ac2d898da5095d46bd1ff8585fdd753d58ad91e7"
            },
            {
              "fixed": "a205740a7231e967ac77cb731171642901c327af"
            },
            {
              "fixed": "7b4d0fab3ff2c00c6d34e1952c9df5129a826aee"
            },
            {
              "fixed": "549c6db503dbb85dbff4840830971853feac6625"
            },
            {
              "fixed": "bc847787233277a337788568e90a6ee1557595eb"
            }
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "type": "GIT"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "Linux",
        "name": "Kernel"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "4.1.0"
            },
            {
              "fixed": "5.10.252"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "5.11.0"
            },
            {
              "fixed": "5.15.202"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "5.16.0"
            },
            {
              "fixed": "6.1.165"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.2.0"
            },
            {
              "fixed": "6.6.128"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.7.0"
            },
            {
              "fixed": "6.12.75"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.13.0"
            },
            {
              "fixed": "6.18.16"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.19.0"
            },
            {
              "fixed": "6.19.6"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "database_specific": {
    "cna_assigner": "Linux",
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/43xxx/CVE-2026-43236.json"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\ndrm/atmel-hlcdc: fix use-after-free of drm_crtc_commit after release\n\nThe atmel_hlcdc_plane_atomic_duplicate_state() callback was copying\nthe atmel_hlcdc_plane state structure without properly duplicating the\ndrm_plane_state. In particular, state-\u003ecommit remained set to the old\nstate commit, which can lead to a use-after-free in the next\ndrm_atomic_commit() call.\n\nFix this by calling\n__drm_atomic_helper_duplicate_plane_state(), which correctly clones\nthe base drm_plane_state (including the -\u003ecommit pointer).\n\nIt has been seen when closing and re-opening the device node while\nanother DRM client (e.g. fbdev) is still attached:\n\n=============================================================================\nBUG kmalloc-64 (Not tainted): Poison overwritten\n-----------------------------------------------------------------------------\n\n0xc611b344-0xc611b344 @offset=836. First byte 0x6a instead of 0x6b\nFIX kmalloc-64: Restoring Poison 0xc611b344-0xc611b344=0x6b\nAllocated in drm_atomic_helper_setup_commit+0x1e8/0x7bc age=178 cpu=0\npid=29\n drm_atomic_helper_setup_commit+0x1e8/0x7bc\n drm_atomic_helper_commit+0x3c/0x15c\n drm_atomic_commit+0xc0/0xf4\n drm_framebuffer_remove+0x4cc/0x5a8\n drm_mode_rmfb_work_fn+0x6c/0x80\n process_one_work+0x12c/0x2cc\n worker_thread+0x2a8/0x400\n kthread+0xc0/0xdc\n ret_from_fork+0x14/0x28\nFreed in drm_atomic_helper_commit_hw_done+0x100/0x150 age=8 cpu=0\npid=169\n drm_atomic_helper_commit_hw_done+0x100/0x150\n drm_atomic_helper_commit_tail+0x64/0x8c\n commit_tail+0x168/0x18c\n drm_atomic_helper_commit+0x138/0x15c\n drm_atomic_commit+0xc0/0xf4\n drm_atomic_helper_set_config+0x84/0xb8\n drm_mode_setcrtc+0x32c/0x810\n drm_ioctl+0x20c/0x488\n sys_ioctl+0x14c/0xc20\n ret_fast_syscall+0x0/0x54\nSlab 0xef8bc360 objects=21 used=16 fp=0xc611b7c0\nflags=0x200(workingset|zone=0)\nObject 0xc611b340 @offset=832 fp=0xc611b7c0",
  "id": "CVE-2026-43236",
  "modified": "2026-08-12T03:51:30.491727315Z",
  "published": "2026-05-06T11:28:31.543Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/549c6db503dbb85dbff4840830971853feac6625"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/6404898af86d986db1dbbe06177c143e40652e49"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/796e77c14c4c1e2cd36473760fb6cc66c695eb47"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/7b4d0fab3ff2c00c6d34e1952c9df5129a826aee"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/a205740a7231e967ac77cb731171642901c327af"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/ac2d898da5095d46bd1ff8585fdd753d58ad91e7"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/bc847787233277a337788568e90a6ee1557595eb"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/fd4a4d0711f48a99b25bcd45e00eef8339eff82d"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/43xxx/CVE-2026-43236.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-43236"
    },
    {
      "type": "PACKAGE",
      "url": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"
    }
  ],
  "schema_version": "1.9.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
      "type": "CVSS_V3"
    }
  ],
  "summary": "drm/atmel-hlcdc: fix use-after-free of drm_crtc_commit after release"
}