cve-2024-46850
Vulnerability from cvelistv5
Published
2024-09-27 12:42
Modified
2024-11-05 09:47
Severity ?
Summary
drm/amd/display: Avoid race between dcn35_set_drr() and dc_state_destruct()
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/42850927656a540428e58d370b3c1599a617bac7Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/e835d5144f5ef78e4f8828c63e2f0d61144f283aPatch
Impacted products
Vendor Product Version
Linux Linux Version: 6.7
Show details on NVD website

To clipboard 

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              "content": {
                "id": "CVE-2024-46850",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2024-09-29T13:58:36.447027Z",
                "version": "2.0.3"
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              "type": "ssvc"
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          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
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        "title": "CISA ADP Vulnrichment"
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    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/gpu/drm/amd/display/dc/hwss/dcn35/dcn35_hwseq.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
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          "programFiles": [
            "drivers/gpu/drm/amd/display/dc/hwss/dcn35/dcn35_hwseq.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
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              "version": "6.10.11",
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      ],
      "descriptions": [
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          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ndrm/amd/display: Avoid race between dcn35_set_drr() and dc_state_destruct()\n\ndc_state_destruct() nulls the resource context of the DC state. The pipe\ncontext passed to dcn35_set_drr() is a member of this resource context.\n\nIf dc_state_destruct() is called parallel to the IRQ processing (which\ncalls dcn35_set_drr() at some point), we can end up using already nulled\nfunction callback fields of struct stream_resource.\n\nThe logic in dcn35_set_drr() already tries to avoid this, by checking tg\nagainst NULL. But if the nulling happens exactly after the NULL check and\nbefore the next access, then we get a race.\n\nAvoid this by copying tg first to a local variable, and then use this\nvariable for all the operations. This should work, as long as nobody\nfrees the resource pool where the timing generators live.\n\n(cherry picked from commit 0607a50c004798a96e62c089a4c34c220179dcb5)"
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2024-11-05T09:47:49.119Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
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          "url": "https://git.kernel.org/stable/c/42850927656a540428e58d370b3c1599a617bac7"
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        {
          "url": "https://git.kernel.org/stable/c/e835d5144f5ef78e4f8828c63e2f0d61144f283a"
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      ],
      "title": "drm/amd/display: Avoid race between dcn35_set_drr() and dc_state_destruct()",
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    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2024-46850",
    "datePublished": "2024-09-27T12:42:43.967Z",
    "dateReserved": "2024-09-11T15:12:18.290Z",
    "dateUpdated": "2024-11-05T09:47:49.119Z",
    "state": "PUBLISHED"
  },
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  "dataVersion": "5.1",
  "meta": {
    "nvd": "{\"cve\":{\"id\":\"CVE-2024-46850\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2024-09-27T13:15:16.787\",\"lastModified\":\"2024-10-04T15:30:32.110\",\"vulnStatus\":\"Analyzed\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"In the Linux kernel, the following vulnerability has been resolved:\\n\\ndrm/amd/display: Avoid race between dcn35_set_drr() and dc_state_destruct()\\n\\ndc_state_destruct() nulls the resource context of the DC state. The pipe\\ncontext passed to dcn35_set_drr() is a member of this resource context.\\n\\nIf dc_state_destruct() is called parallel to the IRQ processing (which\\ncalls dcn35_set_drr() at some point), we can end up using already nulled\\nfunction callback fields of struct stream_resource.\\n\\nThe logic in dcn35_set_drr() already tries to avoid this, by checking tg\\nagainst NULL. But if the nulling happens exactly after the NULL check and\\nbefore the next access, then we get a race.\\n\\nAvoid this by copying tg first to a local variable, and then use this\\nvariable for all the operations. This should work, as long as nobody\\nfrees the resource pool where the timing generators live.\\n\\n(cherry picked from commit 0607a50c004798a96e62c089a4c34c220179dcb5)\"},{\"lang\":\"es\",\"value\":\"En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: drm/amd/display: Evitar la ejecuci\u00f3n entre dcn35_set_drr() y dc_state_destruct() dc_state_destruct() anula el contexto de recurso del estado del DC. El contexto de tuber\u00eda pasado a dcn35_set_drr() es un miembro de este contexto de recurso. Si se llama a dc_state_destruct() en paralelo al procesamiento de IRQ (que llama a dcn35_set_drr() en alg\u00fan momento), podemos terminar usando campos de devoluci\u00f3n de llamada de funci\u00f3n ya anulados de struct stream_resource. La l\u00f3gica en dcn35_set_drr() ya intenta evitar esto, al comprobar tg contra NULL. Pero si la anulaci\u00f3n ocurre exactamente despu\u00e9s de la comprobaci\u00f3n de NULL y antes del siguiente acceso, entonces obtenemos una ejecuci\u00f3n. Evite esto copiando tg primero a una variable local y luego use esta variable para todas las operaciones. Esto deber\u00eda funcionar, siempre y cuando nadie libere el grupo de recursos donde se encuentran los generadores de tiempo. (seleccionado de el commit 0607a50c004798a96e62c089a4c34c220179dcb5)\"}],\"metrics\":{\"cvssMetricV31\":[{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"cvssData\":{\"version\":\"3.1\",\"vectorString\":\"CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H\",\"baseScore\":4.7,\"baseSeverity\":\"MEDIUM\",\"attackVector\":\"LOCAL\",\"attackComplexity\":\"HIGH\",\"privilegesRequired\":\"LOW\",\"userInteraction\":\"NONE\",\"scope\":\"UNCHANGED\",\"confidentialityImpact\":\"NONE\",\"integrityImpact\":\"NONE\",\"availabilityImpact\":\"HIGH\"},\"exploitabilityScore\":1.0,\"impactScore\":3.6}]},\"weaknesses\":[{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"description\":[{\"lang\":\"en\",\"value\":\"CWE-476\"}]}],\"configurations\":[{\"nodes\":[{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"6.7\",\"versionEndExcluding\":\"6.10.11\",\"matchCriteriaId\":\"F5DB5367-F1F5-4200-B3B3-FDF8AFC3D255\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:6.11:rc1:*:*:*:*:*:*\",\"matchCriteriaId\":\"8B3CE743-2126-47A3-8B7C-822B502CF119\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:6.11:rc2:*:*:*:*:*:*\",\"matchCriteriaId\":\"4DEB27E7-30AA-45CC-8934-B89263EF3551\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:6.11:rc3:*:*:*:*:*:*\",\"matchCriteriaId\":\"E0005AEF-856E-47EB-BFE4-90C46899394D\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:6.11:rc4:*:*:*:*:*:*\",\"matchCriteriaId\":\"39889A68-6D34-47A6-82FC-CD0BF23D6754\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:6.11:rc5:*:*:*:*:*:*\",\"matchCriteriaId\":\"B8383ABF-1457-401F-9B61-EE50F4C61F4F\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:6.11:rc6:*:*:*:*:*:*\",\"matchCriteriaId\":\"B77A9280-37E6-49AD-B559-5B23A3B1DC3D\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:6.11:rc7:*:*:*:*:*:*\",\"matchCriteriaId\":\"DE5298B3-04B4-4F3E-B186-01A58B5C75A6\"}]}]}],\"references\":[{\"url\":\"https://git.kernel.org/stable/c/42850927656a540428e58d370b3c1599a617bac7\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/e835d5144f5ef78e4f8828c63e2f0d61144f283a\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]}]}}"
  }
}


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