CVE-2026-93183 (GCVE-0-2026-93183)
Vulnerability from cvelistv5
Published
2026-09-17 16:12
Modified
2026-10-19 09:06
Severity ?
Summary
In the Linux kernel, the following vulnerability has been resolved: drm/lima: call drm_mm_init() with a valid allocation range lima_vm_create() is currently run before va_start and va_end are set up, meaning they are both 0. lima_vm_create() runs drm_mm_init() with them as arguments for the allocator, and if DRM_DEBUG_MM is enabled the DRM_MM_BUG_ON check in drm_mm_init then fires, as seen here on exynos4412-odroid-u2: [ 1.736297] ------------[ cut here ]------------ [ 1.740370] kernel BUG at drivers/gpu/drm/drm_mm.c:931! [ 1.745574] Internal error: Oops - BUG: 0 [#1] SMP ARM [ 1.750697] Modules linked in: [ 1.753734] CPU: 0 UID: 0 PID: 41 Comm: kworker/u16:1 Not tainted 7.0.10-postmarketos-exynos4 #11 PREEMPT [ 1.763372] Hardware name: Samsung Exynos (Flattened Device Tree) [ 1.769446] Workqueue: events_unbound deferred_probe_work_func [ 1.775261] PC is at drm_mm_init+0x9c/0xa4 [ 1.779339] LR is at lima_vm_create+0x144/0x17c [ ... ] Fix the issue by moving the lima_vm_create() call after va_start and va_end are set up.
References
Impacted products
Vendor Product Version
Linux Linux Version: a1d2a6339961efc078208dc3b2f006e9e9a8e119
Version: a1d2a6339961efc078208dc3b2f006e9e9a8e119
Version: a1d2a6339961efc078208dc3b2f006e9e9a8e119
Version: a1d2a6339961efc078208dc3b2f006e9e9a8e119
Version: a1d2a6339961efc078208dc3b2f006e9e9a8e119
Version: a1d2a6339961efc078208dc3b2f006e9e9a8e119
Version: a1d2a6339961efc078208dc3b2f006e9e9a8e119
Version: a1d2a6339961efc078208dc3b2f006e9e9a8e119
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{
  "containers": {
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          "product": "Linux",
          "programFiles": [
            "drivers/gpu/drm/lima/lima_device.c"
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      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ndrm/lima: call drm_mm_init() with a valid allocation range\n\nlima_vm_create() is currently run before va_start and va_end are set up,\nmeaning they are both 0. lima_vm_create() runs drm_mm_init() with them\nas arguments for the allocator, and if DRM_DEBUG_MM is enabled the\nDRM_MM_BUG_ON check in drm_mm_init then fires, as seen here on\nexynos4412-odroid-u2:\n\n[    1.736297] ------------[ cut here ]------------\n[    1.740370] kernel BUG at drivers/gpu/drm/drm_mm.c:931!\n[    1.745574] Internal error: Oops - BUG: 0 [#1] SMP ARM\n[    1.750697] Modules linked in:\n[    1.753734] CPU: 0 UID: 0 PID: 41 Comm: kworker/u16:1 Not tainted 7.0.10-postmarketos-exynos4 #11 PREEMPT\n[    1.763372] Hardware name: Samsung Exynos (Flattened Device Tree)\n[    1.769446] Workqueue: events_unbound deferred_probe_work_func\n[    1.775261] PC is at drm_mm_init+0x9c/0xa4\n[    1.779339] LR is at lima_vm_create+0x144/0x17c\n[ ... ]\n\nFix the issue by moving the lima_vm_create() call after va_start and\nva_end are set up."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-10-19T09:06:56.138Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/af1f276d50c9d7ebcd25770f358ca503a89d96d7"
        },
        {
          "url": "https://git.kernel.org/stable/c/fd6bc5f1d6b54047b06b82bab25a7e21e4b1c95a"
        },
        {
          "url": "https://git.kernel.org/stable/c/ad4e908096dff97646f77b04e2e2825225e215f7"
        },
        {
          "url": "https://git.kernel.org/stable/c/788917ba77f5d69bd368c1d176ecceda346a2951"
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          "url": "https://git.kernel.org/stable/c/79a3331ee436c8b1454f897d539606c9b5ebdf9f"
        },
        {
          "url": "https://git.kernel.org/stable/c/e2a7cee341986cb5b544a8286edc7fb0494c592e"
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        {
          "url": "https://git.kernel.org/stable/c/e0773ad25a34a49aece176721c466cf214e02222"
        },
        {
          "url": "https://git.kernel.org/stable/c/3b3bce4a692ac60d9f4a341e6b597dd1fd0a28f9"
        }
      ],
      "title": "drm/lima: call drm_mm_init() with a valid allocation range",
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  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2026-93183",
    "datePublished": "2026-09-17T16:12:10.072Z",
    "dateReserved": "2026-09-17T16:02:15.091Z",
    "dateUpdated": "2026-10-19T09:06:56.138Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}


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