CVE-2024-26729
Vulnerability from cvelistv5
Published
2024-04-03 17:00
Modified
2024-11-05 09:14
Severity ?
Summary
drm/amd/display: Fix potential null pointer dereference in dc_dmub_srv
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/351080ba3414c96afff0f1338b4aeb2983195b80
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/d2b48f340d9e4a8fbeb1cdc84cd8da6ad143a907
Impacted products
LinuxLinux
LinuxLinux
Show details on NVD website

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                "id": "CVE-2024-26729",
                "options": [
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                    "Exploitation": "none"
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                  {
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                "role": "CISA Coordinator",
                "timestamp": "2024-04-03T18:06:25.283225Z",
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          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
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    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/gpu/drm/amd/display/dc/dc_dmub_srv.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
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          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ndrm/amd/display: Fix potential null pointer dereference in dc_dmub_srv\n\nFixes potential null pointer dereference warnings in the\ndc_dmub_srv_cmd_list_queue_execute() and dc_dmub_srv_is_hw_pwr_up()\nfunctions.\n\nIn both functions, the \u0027dc_dmub_srv\u0027 variable was being dereferenced\nbefore it was checked for null. This could lead to a null pointer\ndereference if \u0027dc_dmub_srv\u0027 is null. The fix is to check if\n\u0027dc_dmub_srv\u0027 is null before dereferencing it.\n\nThus moving the null checks for \u0027dc_dmub_srv\u0027 to the beginning of the\nfunctions to ensure that \u0027dc_dmub_srv\u0027 is not null when it is\ndereferenced.\n\nFound by smatch \u0026 thus fixing the below:\ndrivers/gpu/drm/amd/amdgpu/../display/dc/dc_dmub_srv.c:133 dc_dmub_srv_cmd_list_queue_execute() warn: variable dereferenced before check \u0027dc_dmub_srv\u0027 (see line 128)\ndrivers/gpu/drm/amd/amdgpu/../display/dc/dc_dmub_srv.c:1167 dc_dmub_srv_is_hw_pwr_up() warn: variable dereferenced before check \u0027dc_dmub_srv\u0027 (see line 1164)"
        }
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        "dateUpdated": "2024-11-05T09:14:40.065Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
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      "title": "drm/amd/display: Fix potential null pointer dereference in dc_dmub_srv",
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    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2024-26729",
    "datePublished": "2024-04-03T17:00:17.494Z",
    "dateReserved": "2024-02-19T14:20:24.164Z",
    "dateUpdated": "2024-11-05T09:14:40.065Z",
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    "nvd": "{\"cve\":{\"id\":\"CVE-2024-26729\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2024-04-03T17:15:50.820\",\"lastModified\":\"2024-04-03T17:24:18.150\",\"vulnStatus\":\"Awaiting Analysis\",\"descriptions\":[{\"lang\":\"en\",\"value\":\"In the Linux kernel, the following vulnerability has been resolved:\\n\\ndrm/amd/display: Fix potential null pointer dereference in dc_dmub_srv\\n\\nFixes potential null pointer dereference warnings in the\\ndc_dmub_srv_cmd_list_queue_execute() and dc_dmub_srv_is_hw_pwr_up()\\nfunctions.\\n\\nIn both functions, the \u0027dc_dmub_srv\u0027 variable was being dereferenced\\nbefore it was checked for null. This could lead to a null pointer\\ndereference if \u0027dc_dmub_srv\u0027 is null. The fix is to check if\\n\u0027dc_dmub_srv\u0027 is null before dereferencing it.\\n\\nThus moving the null checks for \u0027dc_dmub_srv\u0027 to the beginning of the\\nfunctions to ensure that \u0027dc_dmub_srv\u0027 is not null when it is\\ndereferenced.\\n\\nFound by smatch \u0026 thus fixing the below:\\ndrivers/gpu/drm/amd/amdgpu/../display/dc/dc_dmub_srv.c:133 dc_dmub_srv_cmd_list_queue_execute() warn: variable dereferenced before check \u0027dc_dmub_srv\u0027 (see line 128)\\ndrivers/gpu/drm/amd/amdgpu/../display/dc/dc_dmub_srv.c:1167 dc_dmub_srv_is_hw_pwr_up() warn: variable dereferenced before check \u0027dc_dmub_srv\u0027 (see line 1164)\"},{\"lang\":\"es\",\"value\":\"En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: drm/amd/display: corrige una posible desreferencia de puntero nulo en dc_dmub_srv. Corrige posibles advertencias de desreferencia de puntero nulo en las funciones dc_dmub_srv_cmd_list_queue_execute() y dc_dmub_srv_is_hw_pwr_up(). En ambas funciones, se estaba desreferenciando la variable \u0027dc_dmub_srv\u0027 antes de verificar si era nula. Esto podr\u00eda provocar una desreferencia del puntero nulo si \u0027dc_dmub_srv\u0027 es nulo. La soluci\u00f3n es comprobar si \u0027dc_dmub_srv\u0027 es nulo antes de eliminar la referencia a \u00e9l. Por lo tanto, se mueven las comprobaciones nulas de \u0027dc_dmub_srv\u0027 al comienzo de las funciones para garantizar que \u0027dc_dmub_srv\u0027 no sea nulo cuando se desreferencia. Encontrado por smatch y arreglando as\u00ed lo siguiente: drivers/gpu/drm/amd/amdgpu/../display/dc/dc_dmub_srv.c:133 dc_dmub_srv_cmd_list_queue_execute() advertencia: variable desreferenciada antes de verificar \u0027dc_dmub_srv\u0027 (ver l\u00ednea 128) drivers/ gpu/drm/amd/amdgpu/../display/dc/dc_dmub_srv.c:1167 dc_dmub_srv_is_hw_pwr_up() advertencia: variable desreferenciada antes de verificar \u0027dc_dmub_srv\u0027 (ver l\u00ednea 1164)\"}],\"metrics\":{},\"references\":[{\"url\":\"https://git.kernel.org/stable/c/351080ba3414c96afff0f1338b4aeb2983195b80\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/d2b48f340d9e4a8fbeb1cdc84cd8da6ad143a907\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"}]}}"
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}


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