CVE-2026-43236 (GCVE-0-2026-43236)

Vulnerability from cvelistv5 – Published: 2026-05-06 11:28 – Updated: 2026-05-08 12:41
VLAI?
Title
drm/atmel-hlcdc: fix use-after-free of drm_crtc_commit after release
Summary
In the Linux kernel, the following vulnerability has been resolved: drm/atmel-hlcdc: fix use-after-free of drm_crtc_commit after release The atmel_hlcdc_plane_atomic_duplicate_state() callback was copying the atmel_hlcdc_plane state structure without properly duplicating the drm_plane_state. In particular, state->commit remained set to the old state commit, which can lead to a use-after-free in the next drm_atomic_commit() call. Fix this by calling __drm_atomic_helper_duplicate_plane_state(), which correctly clones the base drm_plane_state (including the ->commit pointer). It has been seen when closing and re-opening the device node while another DRM client (e.g. fbdev) is still attached: ============================================================================= BUG kmalloc-64 (Not tainted): Poison overwritten ----------------------------------------------------------------------------- 0xc611b344-0xc611b344 @offset=836. First byte 0x6a instead of 0x6b FIX kmalloc-64: Restoring Poison 0xc611b344-0xc611b344=0x6b Allocated in drm_atomic_helper_setup_commit+0x1e8/0x7bc age=178 cpu=0 pid=29 drm_atomic_helper_setup_commit+0x1e8/0x7bc drm_atomic_helper_commit+0x3c/0x15c drm_atomic_commit+0xc0/0xf4 drm_framebuffer_remove+0x4cc/0x5a8 drm_mode_rmfb_work_fn+0x6c/0x80 process_one_work+0x12c/0x2cc worker_thread+0x2a8/0x400 kthread+0xc0/0xdc ret_from_fork+0x14/0x28 Freed in drm_atomic_helper_commit_hw_done+0x100/0x150 age=8 cpu=0 pid=169 drm_atomic_helper_commit_hw_done+0x100/0x150 drm_atomic_helper_commit_tail+0x64/0x8c commit_tail+0x168/0x18c drm_atomic_helper_commit+0x138/0x15c drm_atomic_commit+0xc0/0xf4 drm_atomic_helper_set_config+0x84/0xb8 drm_mode_setcrtc+0x32c/0x810 drm_ioctl+0x20c/0x488 sys_ioctl+0x14c/0xc20 ret_fast_syscall+0x0/0x54 Slab 0xef8bc360 objects=21 used=16 fp=0xc611b7c0 flags=0x200(workingset|zone=0) Object 0xc611b340 @offset=832 fp=0xc611b7c0
Severity ?
7.8 (High)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Assigner
References
Impacted products
Vendor Product Version
Linux Linux Affected: 2389fc1305fc1e2cf8b310a75463fefd3058bf48 , < fd4a4d0711f48a99b25bcd45e00eef8339eff82d (git)
Affected: 2389fc1305fc1e2cf8b310a75463fefd3058bf48 , < 6404898af86d986db1dbbe06177c143e40652e49 (git)
Affected: 2389fc1305fc1e2cf8b310a75463fefd3058bf48 , < 796e77c14c4c1e2cd36473760fb6cc66c695eb47 (git)
Affected: 2389fc1305fc1e2cf8b310a75463fefd3058bf48 , < ac2d898da5095d46bd1ff8585fdd753d58ad91e7 (git)
Affected: 2389fc1305fc1e2cf8b310a75463fefd3058bf48 , < a205740a7231e967ac77cb731171642901c327af (git)
Affected: 2389fc1305fc1e2cf8b310a75463fefd3058bf48 , < 7b4d0fab3ff2c00c6d34e1952c9df5129a826aee (git)
Affected: 2389fc1305fc1e2cf8b310a75463fefd3058bf48 , < 549c6db503dbb85dbff4840830971853feac6625 (git)
Affected: 2389fc1305fc1e2cf8b310a75463fefd3058bf48 , < bc847787233277a337788568e90a6ee1557595eb (git)
Create a notification for this product.
    Linux Linux Affected: 4.1
Unaffected: 0 , < 4.1 (semver)
Unaffected: 5.10.252 , ≤ 5.10.* (semver)
Unaffected: 5.15.202 , ≤ 5.15.* (semver)
Unaffected: 6.1.165 , ≤ 6.1.* (semver)
Unaffected: 6.6.128 , ≤ 6.6.* (semver)
Unaffected: 6.12.75 , ≤ 6.12.* (semver)
Unaffected: 6.18.16 , ≤ 6.18.* (semver)
Unaffected: 6.19.6 , ≤ 6.19.* (semver)
Unaffected: 7.0 , ≤ * (original_commit_for_fix)
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{
  "containers": {
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          "product": "Linux",
          "programFiles": [
            "drivers/gpu/drm/atmel-hlcdc/atmel_hlcdc_plane.c"
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              "status": "unaffected",
              "version": "6.1.165",
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              "status": "unaffected",
              "version": "6.6.128",
              "versionType": "semver"
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              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
              "version": "6.12.75",
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            {
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              "status": "unaffected",
              "version": "6.18.16",
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              "status": "unaffected",
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              "status": "unaffected",
              "version": "7.0",
              "versionType": "original_commit_for_fix"
            }
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        }
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      "descriptions": [
        {
          "lang": "en",
          "value": "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"
        }
      ],
      "metrics": [
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            "baseSeverity": "HIGH",
            "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
            "version": "3.1"
          }
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-05-08T12:41:29.330Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
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        {
          "url": "https://git.kernel.org/stable/c/fd4a4d0711f48a99b25bcd45e00eef8339eff82d"
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        {
          "url": "https://git.kernel.org/stable/c/bc847787233277a337788568e90a6ee1557595eb"
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      ],
      "title": "drm/atmel-hlcdc: fix use-after-free of drm_crtc_commit after release",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
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    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2026-43236",
    "datePublished": "2026-05-06T11:28:31.543Z",
    "dateReserved": "2026-05-01T14:12:55.995Z",
    "dateUpdated": "2026-05-08T12:41:29.330Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
    "epss": {
      "cve": "CVE-2026-43236",
      "date": "2026-05-09",
      "epss": "0.00012",
      "percentile": "0.01766"
    },
    "nvd": "{\"cve\":{\"id\":\"CVE-2026-43236\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2026-05-06T12:16:43.817\",\"lastModified\":\"2026-05-08T13:16:46.843\",\"vulnStatus\":\"Undergoing Analysis\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"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\"}],\"metrics\":{\"cvssMetricV31\":[{\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"type\":\"Secondary\",\"cvssData\":{\"version\":\"3.1\",\"vectorString\":\"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H\",\"baseScore\":7.8,\"baseSeverity\":\"HIGH\",\"attackVector\":\"LOCAL\",\"attackComplexity\":\"LOW\",\"privilegesRequired\":\"LOW\",\"userInteraction\":\"NONE\",\"scope\":\"UNCHANGED\",\"confidentialityImpact\":\"HIGH\",\"integrityImpact\":\"HIGH\",\"availabilityImpact\":\"HIGH\"},\"exploitabilityScore\":1.8,\"impactScore\":5.9}]},\"references\":[{\"url\":\"https://git.kernel.org/stable/c/549c6db503dbb85dbff4840830971853feac6625\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/6404898af86d986db1dbbe06177c143e40652e49\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/796e77c14c4c1e2cd36473760fb6cc66c695eb47\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/7b4d0fab3ff2c00c6d34e1952c9df5129a826aee\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/a205740a7231e967ac77cb731171642901c327af\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/ac2d898da5095d46bd1ff8585fdd753d58ad91e7\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/bc847787233277a337788568e90a6ee1557595eb\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/fd4a4d0711f48a99b25bcd45e00eef8339eff82d\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"}]}}"
  }
}


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Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

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  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
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  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
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  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.



Detection rules are retrieved from Rulezet.