CVE-2024-56769 (GCVE-0-2024-56769)
Vulnerability from cvelistv5
Published
2025-01-06 16:20
Modified
2025-05-04 10:04
Severity ?
Summary
In the Linux kernel, the following vulnerability has been resolved: media: dvb-frontends: dib3000mb: fix uninit-value in dib3000_write_reg Syzbot reports [1] an uninitialized value issue found by KMSAN in dib3000_read_reg(). Local u8 rb[2] is used in i2c_transfer() as a read buffer; in case that call fails, the buffer may end up with some undefined values. Since no elaborate error handling is expected in dib3000_write_reg(), simply zero out rb buffer to mitigate the problem. [1] Syzkaller report dvb-usb: bulk message failed: -22 (6/0) ===================================================== BUG: KMSAN: uninit-value in dib3000mb_attach+0x2d8/0x3c0 drivers/media/dvb-frontends/dib3000mb.c:758 dib3000mb_attach+0x2d8/0x3c0 drivers/media/dvb-frontends/dib3000mb.c:758 dibusb_dib3000mb_frontend_attach+0x155/0x2f0 drivers/media/usb/dvb-usb/dibusb-mb.c:31 dvb_usb_adapter_frontend_init+0xed/0x9a0 drivers/media/usb/dvb-usb/dvb-usb-dvb.c:290 dvb_usb_adapter_init drivers/media/usb/dvb-usb/dvb-usb-init.c:90 [inline] dvb_usb_init drivers/media/usb/dvb-usb/dvb-usb-init.c:186 [inline] dvb_usb_device_init+0x25a8/0x3760 drivers/media/usb/dvb-usb/dvb-usb-init.c:310 dibusb_probe+0x46/0x250 drivers/media/usb/dvb-usb/dibusb-mb.c:110 ... Local variable rb created at: dib3000_read_reg+0x86/0x4e0 drivers/media/dvb-frontends/dib3000mb.c:54 dib3000mb_attach+0x123/0x3c0 drivers/media/dvb-frontends/dib3000mb.c:758 ...
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/035772fcd631eee2756b31cb6df249c0a8d453d7
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/1d6de21f00293d819b5ca6dbe75ff1f3b6392140Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/2dd59fe0e19e1ab955259978082b62e5751924c7Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/3876e3a1c31a58a352c6bf5d2a90e3304445a637Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/53106510736e734ce8b731ba871363389bfbf4c9
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/c1197c1457bb7098cf46366e898eb52b41b6876aPatch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/e11778189513cd7fb2edced5bd053bc18ede8418
Impacted products
Vendor Product Version
Linux Linux Version: 74340b0a8bc60b400c7e5fe4950303aa6f914d16
Version: 74340b0a8bc60b400c7e5fe4950303aa6f914d16
Version: 74340b0a8bc60b400c7e5fe4950303aa6f914d16
Version: 74340b0a8bc60b400c7e5fe4950303aa6f914d16
Version: 74340b0a8bc60b400c7e5fe4950303aa6f914d16
Version: 74340b0a8bc60b400c7e5fe4950303aa6f914d16
Version: 74340b0a8bc60b400c7e5fe4950303aa6f914d16
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   Linux Linux Version: 2.6.19
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{
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          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nmedia: dvb-frontends: dib3000mb: fix uninit-value in dib3000_write_reg\n\nSyzbot reports [1] an uninitialized value issue found by KMSAN in\ndib3000_read_reg().\n\nLocal u8 rb[2] is used in i2c_transfer() as a read buffer; in case\nthat call fails, the buffer may end up with some undefined values.\n\nSince no elaborate error handling is expected in dib3000_write_reg(),\nsimply zero out rb buffer to mitigate the problem.\n\n[1] Syzkaller report\ndvb-usb: bulk message failed: -22 (6/0)\n=====================================================\nBUG: KMSAN: uninit-value in dib3000mb_attach+0x2d8/0x3c0 drivers/media/dvb-frontends/dib3000mb.c:758\n dib3000mb_attach+0x2d8/0x3c0 drivers/media/dvb-frontends/dib3000mb.c:758\n dibusb_dib3000mb_frontend_attach+0x155/0x2f0 drivers/media/usb/dvb-usb/dibusb-mb.c:31\n dvb_usb_adapter_frontend_init+0xed/0x9a0 drivers/media/usb/dvb-usb/dvb-usb-dvb.c:290\n dvb_usb_adapter_init drivers/media/usb/dvb-usb/dvb-usb-init.c:90 [inline]\n dvb_usb_init drivers/media/usb/dvb-usb/dvb-usb-init.c:186 [inline]\n dvb_usb_device_init+0x25a8/0x3760 drivers/media/usb/dvb-usb/dvb-usb-init.c:310\n dibusb_probe+0x46/0x250 drivers/media/usb/dvb-usb/dibusb-mb.c:110\n...\nLocal variable rb created at:\n dib3000_read_reg+0x86/0x4e0 drivers/media/dvb-frontends/dib3000mb.c:54\n dib3000mb_attach+0x123/0x3c0 drivers/media/dvb-frontends/dib3000mb.c:758\n..."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2025-05-04T10:04:17.708Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
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      ],
      "title": "media: dvb-frontends: dib3000mb: fix uninit-value in dib3000_write_reg",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
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  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2024-56769",
    "datePublished": "2025-01-06T16:20:46.838Z",
    "dateReserved": "2024-12-29T11:26:39.763Z",
    "dateUpdated": "2025-05-04T10:04:17.708Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.1",
  "vulnerability-lookup:meta": {
    "nvd": "{\"cve\":{\"id\":\"CVE-2024-56769\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2025-01-06T17:15:44.063\",\"lastModified\":\"2025-01-09T16:16:24.203\",\"vulnStatus\":\"Modified\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"In the Linux kernel, the following vulnerability has been resolved:\\n\\nmedia: dvb-frontends: dib3000mb: fix uninit-value in dib3000_write_reg\\n\\nSyzbot reports [1] an uninitialized value issue found by KMSAN in\\ndib3000_read_reg().\\n\\nLocal u8 rb[2] is used in i2c_transfer() as a read buffer; in case\\nthat call fails, the buffer may end up with some undefined values.\\n\\nSince no elaborate error handling is expected in dib3000_write_reg(),\\nsimply zero out rb buffer to mitigate the problem.\\n\\n[1] Syzkaller report\\ndvb-usb: bulk message failed: -22 (6/0)\\n=====================================================\\nBUG: KMSAN: uninit-value in dib3000mb_attach+0x2d8/0x3c0 drivers/media/dvb-frontends/dib3000mb.c:758\\n dib3000mb_attach+0x2d8/0x3c0 drivers/media/dvb-frontends/dib3000mb.c:758\\n dibusb_dib3000mb_frontend_attach+0x155/0x2f0 drivers/media/usb/dvb-usb/dibusb-mb.c:31\\n dvb_usb_adapter_frontend_init+0xed/0x9a0 drivers/media/usb/dvb-usb/dvb-usb-dvb.c:290\\n dvb_usb_adapter_init drivers/media/usb/dvb-usb/dvb-usb-init.c:90 [inline]\\n dvb_usb_init drivers/media/usb/dvb-usb/dvb-usb-init.c:186 [inline]\\n dvb_usb_device_init+0x25a8/0x3760 drivers/media/usb/dvb-usb/dvb-usb-init.c:310\\n dibusb_probe+0x46/0x250 drivers/media/usb/dvb-usb/dibusb-mb.c:110\\n...\\nLocal variable rb created at:\\n dib3000_read_reg+0x86/0x4e0 drivers/media/dvb-frontends/dib3000mb.c:54\\n dib3000mb_attach+0x123/0x3c0 drivers/media/dvb-frontends/dib3000mb.c:758\\n...\"},{\"lang\":\"es\",\"value\":\"En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: media: dvb-frontends: dib3000mb: correcci\u00f3n de un valor no inicializado en dib3000_write_reg Syzbot informa [1] de un problema de valor no inicializado encontrado por KMSAN en dib3000_read_reg(). El rb u8 local [2] se utiliza en i2c_transfer() como un b\u00fafer de lectura; en caso de que esa llamada falle, el b\u00fafer puede terminar con algunos valores indefinidos. Dado que no se espera una gesti\u00f3n elaborada de errores en dib3000_write_reg(), simplemente ponga a cero el b\u00fafer rb para mitigar el problema. [1] Syzkaller informa dvb-usb: error en el mensaje masivo: -22 (6/0) ======================================================= ERROR: KMSAN: valor no inicializado en dib3000mb_attach+0x2d8/0x3c0 drivers/media/dvb-frontends/dib3000mb.c:758 dib3000mb_attach+0x2d8/0x3c0 drivers/media/dvb-frontends/dib3000mb.c:758 dibusb_dib3000mb_frontend_attach+0x155/0x2f0 drivers/media/usb/dvb-usb/dibusb-mb.c:31 dvb_usb_adapter_frontend_init+0xed/0x9a0 drivers/media/usb/dvb-usb/dvb-usb-dvb.c:290 dvb_usb_adapter_init drivers/media/usb/dvb-usb/dvb-usb-init.c:90 [en l\u00ednea] dvb_usb_init drivers/media/usb/dvb-usb/dvb-usb-init.c:186 [en l\u00ednea] dvb_usb_device_init+0x25a8/0x3760 drivers/media/usb/dvb-usb/dvb-usb-init.c:310 dibusb_probe+0x46/0x250 drivers/media/usb/dvb-usb/dibusb-mb.c:110 ... Variable local rb manipulado en: dib3000_read_reg+0x86/0x4e0 drivers/media/dvb-frontends/dib3000mb.c:54 dib3000mb_attach+0x123/0x3c0 drivers/media/dvb-frontends/dib3000mb.c:758 ...\"}],\"metrics\":{\"cvssMetricV31\":[{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"cvssData\":{\"version\":\"3.1\",\"vectorString\":\"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H\",\"baseScore\":5.5,\"baseSeverity\":\"MEDIUM\",\"attackVector\":\"LOCAL\",\"attackComplexity\":\"LOW\",\"privilegesRequired\":\"LOW\",\"userInteraction\":\"NONE\",\"scope\":\"UNCHANGED\",\"confidentialityImpact\":\"NONE\",\"integrityImpact\":\"NONE\",\"availabilityImpact\":\"HIGH\"},\"exploitabilityScore\":1.8,\"impactScore\":3.6}]},\"weaknesses\":[{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"description\":[{\"lang\":\"en\",\"value\":\"CWE-908\"}]}],\"configurations\":[{\"nodes\":[{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"2.6.19\",\"versionEndExcluding\":\"6.1.123\",\"matchCriteriaId\":\"C5D912DD-BB55-4C0A-AEDF-47A0C02B408C\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"6.2\",\"versionEndExcluding\":\"6.6.69\",\"matchCriteriaId\":\"EF18E3CB-058C-4836-B36D-8073F1C09977\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"6.7\",\"versionEndExcluding\":\"6.12.8\",\"matchCriteriaId\":\"E79883DD-75BE-4DA9-B4EC-AC6DE63BD438\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:6.13:rc1:*:*:*:*:*:*\",\"matchCriteriaId\":\"62567B3C-6CEE-46D0-BC2E-B3717FBF7D13\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:6.13:rc2:*:*:*:*:*:*\",\"matchCriteriaId\":\"5A073481-106D-4B15-B4C7-FB0213B8E1D4\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:6.13:rc3:*:*:*:*:*:*\",\"matchCriteriaId\":\"DE491969-75AE-4A6B-9A58-8FC5AF98798F\"}]}]}],\"references\":[{\"url\":\"https://git.kernel.org/stable/c/035772fcd631eee2756b31cb6df249c0a8d453d7\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/1d6de21f00293d819b5ca6dbe75ff1f3b6392140\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/2dd59fe0e19e1ab955259978082b62e5751924c7\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/3876e3a1c31a58a352c6bf5d2a90e3304445a637\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/53106510736e734ce8b731ba871363389bfbf4c9\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/c1197c1457bb7098cf46366e898eb52b41b6876a\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/e11778189513cd7fb2edced5bd053bc18ede8418\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"}]}}"
  }
}


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