CVE-2025-39705 (GCVE-0-2025-39705)
Vulnerability from cvelistv5
Published
2025-09-05 17:21
Modified
2025-09-29 05:57
Severity ?
Summary
In the Linux kernel, the following vulnerability has been resolved: drm/amd/display: fix a Null pointer dereference vulnerability [Why] A null pointer dereference vulnerability exists in the AMD display driver's (DC module) cleanup function dc_destruct(). When display control context (dc->ctx) construction fails (due to memory allocation failure), this pointer remains NULL. During subsequent error handling when dc_destruct() is called, there's no NULL check before dereferencing the perf_trace member (dc->ctx->perf_trace), causing a kernel null pointer dereference crash. [How] Check if dc->ctx is non-NULL before dereferencing. (Updated commit text and removed unnecessary error message) (cherry picked from commit 9dd8e2ba268c636c240a918e0a31e6feaee19404)
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/0961673cc5f0055957aa46f25eb4ef6c07e00165
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/1bcf63a44381691d6192872801f830ce3250e367
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/4ade995b9b25b3c6e8dc42c27070340f1358d8c8
Impacted products
Vendor Product Version
Linux Linux Version: 4562236b3bc0a28aeb6ee93b2d8a849a4c4e1c7c
Version: 4562236b3bc0a28aeb6ee93b2d8a849a4c4e1c7c
Version: 4562236b3bc0a28aeb6ee93b2d8a849a4c4e1c7c
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   Linux Linux Version: 4.15
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{
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      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/gpu/drm/amd/display/dc/core/dc.c"
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      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ndrm/amd/display: fix a Null pointer dereference vulnerability\n\n[Why]\nA null pointer dereference vulnerability exists in the AMD display driver\u0027s\n(DC module) cleanup function dc_destruct().\nWhen display control context (dc-\u003ectx) construction fails\n(due to memory allocation failure), this pointer remains NULL.\nDuring subsequent error handling when dc_destruct() is called,\nthere\u0027s no NULL check before dereferencing the perf_trace member\n(dc-\u003ectx-\u003eperf_trace), causing a kernel null pointer dereference crash.\n\n[How]\nCheck if dc-\u003ectx is non-NULL before dereferencing.\n\n(Updated commit text and removed unnecessary error message)\n(cherry picked from commit 9dd8e2ba268c636c240a918e0a31e6feaee19404)"
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        "dateUpdated": "2025-09-29T05:57:47.898Z",
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        "shortName": "Linux"
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        },
        {
          "url": "https://git.kernel.org/stable/c/1bcf63a44381691d6192872801f830ce3250e367"
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      "title": "drm/amd/display: fix a Null pointer dereference vulnerability",
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  "cveMetadata": {
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    "assignerShortName": "Linux",
    "cveId": "CVE-2025-39705",
    "datePublished": "2025-09-05T17:21:11.767Z",
    "dateReserved": "2025-04-16T07:20:57.115Z",
    "dateUpdated": "2025-09-29T05:57:47.898Z",
    "state": "PUBLISHED"
  },
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  "vulnerability-lookup:meta": {
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  }
}


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