FKIE_CVE-2024-41094

Vulnerability from fkie_nvd - Published: 2024-07-29 16:15 - Updated: 2026-06-17 07:47
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/fbdev-dma: Only set smem_start is enable per module option Only export struct fb_info.fix.smem_start if that is required by the user and the memory does not come from vmalloc(). Setting struct fb_info.fix.smem_start breaks systems where DMA memory is backed by vmalloc address space. An example error is shown below. [ 3.536043] ------------[ cut here ]------------ [ 3.540716] virt_to_phys used for non-linear address: 000000007fc4f540 (0xffff800086001000) [ 3.552628] WARNING: CPU: 4 PID: 61 at arch/arm64/mm/physaddr.c:12 __virt_to_phys+0x68/0x98 [ 3.565455] Modules linked in: [ 3.568525] CPU: 4 PID: 61 Comm: kworker/u12:5 Not tainted 6.6.23-06226-g4986cc3e1b75-dirty #250 [ 3.577310] Hardware name: NXP i.MX95 19X19 board (DT) [ 3.582452] Workqueue: events_unbound deferred_probe_work_func [ 3.588291] pstate: 60400009 (nZCv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--) [ 3.595233] pc : __virt_to_phys+0x68/0x98 [ 3.599246] lr : __virt_to_phys+0x68/0x98 [ 3.603276] sp : ffff800083603990 [ 3.677939] Call trace: [ 3.680393] __virt_to_phys+0x68/0x98 [ 3.684067] drm_fbdev_dma_helper_fb_probe+0x138/0x238 [ 3.689214] __drm_fb_helper_initial_config_and_unlock+0x2b0/0x4c0 [ 3.695385] drm_fb_helper_initial_config+0x4c/0x68 [ 3.700264] drm_fbdev_dma_client_hotplug+0x8c/0xe0 [ 3.705161] drm_client_register+0x60/0xb0 [ 3.709269] drm_fbdev_dma_setup+0x94/0x148 Additionally, DMA memory is assumed to by contiguous in physical address space, which is not guaranteed by vmalloc(). Resolve this by checking the module flag drm_leak_fbdev_smem when DRM allocated the instance of struct fb_info. Fbdev-dma then only sets smem_start only if required (via FBINFO_HIDE_SMEM_START). Also guarantee that the framebuffer is not located in vmalloc address space.
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/00702cfa8432ac67a72f56de5e1d278ddea2ebdePatch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/d92a7580392ad4681b1d4f9275d00b95375ebe01Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/f29fcfbf6067c0d8c83f84a045da9276c08deac5Patch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/00702cfa8432ac67a72f56de5e1d278ddea2ebdePatch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/d92a7580392ad4681b1d4f9275d00b95375ebe01Patch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/f29fcfbf6067c0d8c83f84a045da9276c08deac5Patch
Impacted products
Vendor Product Version
linux linux_kernel *
linux linux_kernel *
To clipboard 

{
  "affected": [
    {
      "affectedData": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/gpu/drm/drm_fb_helper.c",
            "drivers/gpu/drm/drm_fbdev_dma.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "f29fcfbf6067c0d8c83f84a045da9276c08deac5",
              "status": "affected",
              "version": "a51c7663f144606a5f08e772fa3e1e4f2277a614",
              "versionType": "git"
            },
            {
              "lessThan": "00702cfa8432ac67a72f56de5e1d278ddea2ebde",
              "status": "affected",
              "version": "a51c7663f144606a5f08e772fa3e1e4f2277a614",
              "versionType": "git"
            },
            {
              "lessThan": "d92a7580392ad4681b1d4f9275d00b95375ebe01",
              "status": "affected",
              "version": "a51c7663f144606a5f08e772fa3e1e4f2277a614",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "drivers/gpu/drm/drm_fb_helper.c",
            "drivers/gpu/drm/drm_fbdev_dma.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "6.4"
            },
            {
              "lessThan": "6.4",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.6.*",
              "status": "unaffected",
              "version": "6.6.37",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.9.*",
              "status": "unaffected",
              "version": "6.9.8",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "6.10",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    }
  ],
  "configurations": [
    {
      "nodes": [
        {
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "99BA6BEA-A8FA-4C05-955A-F9CF38DD37DD",
              "versionEndExcluding": "6.6.37",
              "versionStartIncluding": "6.4",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "E95105F2-32E3-4C5F-9D18-7AEFD0E6275C",
              "versionEndExcluding": "6.9.8",
              "versionStartIncluding": "6.7",
              "vulnerable": true
            }
          ],
          "negate": false,
          "operator": "OR"
        }
      ]
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ndrm/fbdev-dma: Only set smem_start is enable per module option\n\nOnly export struct fb_info.fix.smem_start if that is required by the\nuser and the memory does not come from vmalloc().\n\nSetting struct fb_info.fix.smem_start breaks systems where DMA\nmemory is backed by vmalloc address space. An example error is\nshown below.\n\n[    3.536043] ------------[ cut here ]------------\n[    3.540716] virt_to_phys used for non-linear address: 000000007fc4f540 (0xffff800086001000)\n[    3.552628] WARNING: CPU: 4 PID: 61 at arch/arm64/mm/physaddr.c:12 __virt_to_phys+0x68/0x98\n[    3.565455] Modules linked in:\n[    3.568525] CPU: 4 PID: 61 Comm: kworker/u12:5 Not tainted 6.6.23-06226-g4986cc3e1b75-dirty #250\n[    3.577310] Hardware name: NXP i.MX95 19X19 board (DT)\n[    3.582452] Workqueue: events_unbound deferred_probe_work_func\n[    3.588291] pstate: 60400009 (nZCv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--)\n[    3.595233] pc : __virt_to_phys+0x68/0x98\n[    3.599246] lr : __virt_to_phys+0x68/0x98\n[    3.603276] sp : ffff800083603990\n[    3.677939] Call trace:\n[    3.680393]  __virt_to_phys+0x68/0x98\n[    3.684067]  drm_fbdev_dma_helper_fb_probe+0x138/0x238\n[    3.689214]  __drm_fb_helper_initial_config_and_unlock+0x2b0/0x4c0\n[    3.695385]  drm_fb_helper_initial_config+0x4c/0x68\n[    3.700264]  drm_fbdev_dma_client_hotplug+0x8c/0xe0\n[    3.705161]  drm_client_register+0x60/0xb0\n[    3.709269]  drm_fbdev_dma_setup+0x94/0x148\n\nAdditionally, DMA memory is assumed to by contiguous in physical\naddress space, which is not guaranteed by vmalloc().\n\nResolve this by checking the module flag drm_leak_fbdev_smem when\nDRM allocated the instance of struct fb_info. Fbdev-dma then only\nsets smem_start only if required (via FBINFO_HIDE_SMEM_START). Also\nguarantee that the framebuffer is not located in vmalloc address\nspace."
    },
    {
      "lang": "es",
      "value": "En el kernel de Linux, se resolvi\u00f3 la siguiente vulnerabilidad: drm/fbdev-dma: solo configurar smem_start est\u00e1 habilitado por opci\u00f3n de m\u00f3dulo. Solo exporte la estructura fb_info.fix.smem_start si as\u00ed lo requiere el usuario y la memoria no proviene de vmalloc( ). La configuraci\u00f3n de struct fb_info.fix.smem_start interrumpe los sistemas donde la memoria DMA est\u00e1 respaldada por el espacio de direcciones vmalloc. A continuaci\u00f3n se muestra un error de ejemplo. [3.536043] ------------[ cortar aqu\u00ed ]------------ [ 3.540716] virt_to_phys usado para direcciones no lineales: 000000007fc4f540 (0xffff800086001000) [ 3.552628] ADVERTENCIA : CPU: 4 PID: 61 en arch/arm64/mm/physaddr.c:12 __virt_to_phys+0x68/0x98 [ 3.565455] M\u00f3dulos vinculados en: [ 3.568525] CPU: 4 PID: 61 Comm: kworker/u12:5 No contaminado 6.6 .23-06226-g4986cc3e1b75-dirty #250 [ 3.577310] Nombre de hardware: placa NXP i.MX95 19X19 (DT) [ 3.582452] Cola de trabajo: events_unbound deferred_probe_work_func [ 3.588291] pstate: 60400009 (nZCv daif +PAN -UAO -TCO -DIT- SSBS BTYPE=--) [ 3.595233] pc : __virt_to_phys+0x68/0x98 [ 3.599246] lr : __virt_to_phys+0x68/0x98 [ 3.603276] sp : ffff800083603990 [ 3.677939] Rastreo de llamadas: [ 3.68039 3] __virt_to_phys+0x68/0x98 [ 3.684067] drm_fbdev_dma_helper_fb_probe +0x138/0x238 [ 3.689214] __drm_fb_helper_initial_config_and_unlock+0x2b0/0x4c0 [ 3.695385] drm_fb_helper_initial_config+0x4c/0x68 [ 3.700264] xe0 [ 3.705161] drm_client_register+0x60/0xb0 [ 3.709269] drm_fbdev_dma_setup+0x94/0x148 Adem\u00e1s, se supone memoria DMA a por contiguo en el espacio de direcciones f\u00edsicas, lo cual no est\u00e1 garantizado por vmalloc(). Resuelva esto verificando el indicador del m\u00f3dulo drm_leak_fbdev_smem cuando DRM asign\u00f3 la instancia de la estructura fb_info. Luego, Fbdev-dma solo configura smem_start solo si es necesario (a trav\u00e9s de FBINFO_HIDE_SMEM_START). Tambi\u00e9n garantice que el framebuffer no est\u00e9 ubicado en el espacio de direcciones vmalloc."
    }
  ],
  "id": "CVE-2024-41094",
  "lastModified": "2026-06-17T07:47:16.337",
  "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"
      }
    ],
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "id": "CVE-2024-41094",
          "options": [
            {
              "exploitation": "none"
            },
            {
              "automatable": "no"
            },
            {
              "technicalImpact": "partial"
            }
          ],
          "role": "CISA Coordinator",
          "timestamp": "2024-09-10T16:20:29.018042Z",
          "version": "2.0.3"
        }
      }
    ]
  },
  "published": "2024-07-29T16:15:04.543",
  "references": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "tags": [
        "Patch"
      ],
      "url": "https://git.kernel.org/stable/c/00702cfa8432ac67a72f56de5e1d278ddea2ebde"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "tags": [
        "Patch"
      ],
      "url": "https://git.kernel.org/stable/c/d92a7580392ad4681b1d4f9275d00b95375ebe01"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "tags": [
        "Patch"
      ],
      "url": "https://git.kernel.org/stable/c/f29fcfbf6067c0d8c83f84a045da9276c08deac5"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "tags": [
        "Patch"
      ],
      "url": "https://git.kernel.org/stable/c/00702cfa8432ac67a72f56de5e1d278ddea2ebde"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "tags": [
        "Patch"
      ],
      "url": "https://git.kernel.org/stable/c/d92a7580392ad4681b1d4f9275d00b95375ebe01"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "tags": [
        "Patch"
      ],
      "url": "https://git.kernel.org/stable/c/f29fcfbf6067c0d8c83f84a045da9276c08deac5"
    }
  ],
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "vulnStatus": "Modified",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "NVD-CWE-noinfo"
        }
      ],
      "source": "nvd@nist.gov",
      "type": "Primary"
    }
  ]
}



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