fkie_cve-2024-44955
Vulnerability from fkie_nvd
Published
2024-09-04 19:15
Modified
2024-12-09 13:10
Severity ?
5.5 (Medium) - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Summary
In the Linux kernel, the following vulnerability has been resolved: drm/amd/display: Don't refer to dc_sink in is_dsc_need_re_compute [Why] When unplug one of monitors connected after mst hub, encounter null pointer dereference. It's due to dc_sink get released immediately in early_unregister() or detect_ctx(). When commit new state which directly referring to info stored in dc_sink will cause null pointer dereference. [how] Remove redundant checking condition. Relevant condition should already be covered by checking if dsc_aux is null or not. Also reset dsc_aux to NULL when the connector is disconnected.
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/39b217193729aa45eded8de24d9245468a0c0263Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/c7e65cab54a89f4df54110f0b44c4ade93d1a911
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/fcf6a49d79923a234844b8efe830a61f3f0584e4Patch
Impacted products
Vendor Product Version
linux linux_kernel *


To clipboard 

{
   configurations: [
      {
         nodes: [
            {
               cpeMatch: [
                  {
                     criteria: "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                     matchCriteriaId: "E4CB0927-C720-465B-99F2-3E47215515F2",
                     versionEndExcluding: "6.10.5",
                     vulnerable: true,
                  },
               ],
               negate: false,
               operator: "OR",
            },
         ],
      },
   ],
   cveTags: [],
   descriptions: [
      {
         lang: "en",
         value: "In the Linux kernel, the following vulnerability has been resolved:\n\ndrm/amd/display: Don't refer to dc_sink in is_dsc_need_re_compute\n\n[Why]\nWhen unplug one of monitors connected after mst hub, encounter null pointer dereference.\n\nIt's due to dc_sink get released immediately in early_unregister() or detect_ctx(). When\ncommit new state which directly referring to info stored in dc_sink will cause null pointer\ndereference.\n\n[how]\nRemove redundant checking condition. Relevant condition should already be covered by checking\nif dsc_aux is null or not. Also reset dsc_aux to NULL when the connector is disconnected.",
      },
      {
         lang: "es",
         value: "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: drm/amd/display: No hacer referencia a dc_sink en is_dsc_need_re_compute [Por qué] Cuando se desconecta uno de los monitores conectados después del concentrador mst, se produce una desreferencia de puntero nulo. Esto se debe a que dc_sink se libera inmediatamente en early_unregister() o detect_ctx(). Cuando se confirma un nuevo estado que hace referencia directa a la información almacenada en dc_sink, se producirá una desreferencia de puntero nulo. [Cómo] Eliminar la condición de comprobación redundante. La condición relevante ya debería estar cubierta comprobando si dsc_aux es nulo o no. También se restablece dsc_aux a NULL cuando se desconecta el conector.",
      },
   ],
   id: "CVE-2024-44955",
   lastModified: "2024-12-09T13:10:03.600",
   metrics: {
      cvssMetricV31: [
         {
            cvssData: {
               attackComplexity: "LOW",
               attackVector: "LOCAL",
               availabilityImpact: "HIGH",
               baseScore: 5.5,
               baseSeverity: "MEDIUM",
               confidentialityImpact: "NONE",
               integrityImpact: "NONE",
               privilegesRequired: "LOW",
               scope: "UNCHANGED",
               userInteraction: "NONE",
               vectorString: "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
               version: "3.1",
            },
            exploitabilityScore: 1.8,
            impactScore: 3.6,
            source: "nvd@nist.gov",
            type: "Primary",
         },
      ],
   },
   published: "2024-09-04T19:15:30.423",
   references: [
      {
         source: "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
         tags: [
            "Patch",
         ],
         url: "https://git.kernel.org/stable/c/39b217193729aa45eded8de24d9245468a0c0263",
      },
      {
         source: "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
         url: "https://git.kernel.org/stable/c/c7e65cab54a89f4df54110f0b44c4ade93d1a911",
      },
      {
         source: "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
         tags: [
            "Patch",
         ],
         url: "https://git.kernel.org/stable/c/fcf6a49d79923a234844b8efe830a61f3f0584e4",
      },
   ],
   sourceIdentifier: "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
   vulnStatus: "Modified",
   weaknesses: [
      {
         description: [
            {
               lang: "en",
               value: "CWE-476",
            },
         ],
         source: "nvd@nist.gov",
         type: "Primary",
      },
   ],
}


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