FKIE_CVE-2022-49844

Vulnerability from fkie_nvd - Published: 2025-05-01 15:16 - Updated: 2026-06-17 05:19
Severity
7.1 (High) - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H
7.1 (High) - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H
Summary
In the Linux kernel, the following vulnerability has been resolved: can: dev: fix skb drop check In commit a6d190f8c767 ("can: skb: drop tx skb if in listen only mode") the priv->ctrlmode element is read even on virtual CAN interfaces that do not create the struct can_priv at startup. This out-of-bounds read may lead to CAN frame drops for virtual CAN interfaces like vcan and vxcan. This patch mainly reverts the original commit and adds a new helper for CAN interface drivers that provide the required information in struct can_priv. [mkl: patch pch_can, too]
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/386c49fe31ee748e053860b3bac7794a933ac9acPatch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/ae64438be1923e3c1102d90fd41db7afcfaf54ccPatch
Impacted products
Vendor Product Version
linux linux_kernel *
linux linux_kernel 6.1
linux linux_kernel 6.1
linux linux_kernel 6.1
linux linux_kernel 6.1
To clipboard 

{
  "affected": [
    {
      "affectedData": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/net/can/at91_can.c",
            "drivers/net/can/c_can/c_can_main.c",
            "drivers/net/can/can327.c",
            "drivers/net/can/cc770/cc770.c",
            "drivers/net/can/ctucanfd/ctucanfd_base.c",
            "drivers/net/can/dev/skb.c",
            "drivers/net/can/flexcan/flexcan-core.c",
            "drivers/net/can/grcan.c",
            "drivers/net/can/ifi_canfd/ifi_canfd.c",
            "drivers/net/can/janz-ican3.c",
            "drivers/net/can/kvaser_pciefd.c",
            "drivers/net/can/m_can/m_can.c",
            "drivers/net/can/mscan/mscan.c",
            "drivers/net/can/pch_can.c",
            "drivers/net/can/peak_canfd/peak_canfd.c",
            "drivers/net/can/rcar/rcar_can.c",
            "drivers/net/can/rcar/rcar_canfd.c",
            "drivers/net/can/sja1000/sja1000.c",
            "drivers/net/can/slcan/slcan-core.c",
            "drivers/net/can/softing/softing_main.c",
            "drivers/net/can/spi/hi311x.c",
            "drivers/net/can/spi/mcp251x.c",
            "drivers/net/can/spi/mcp251xfd/mcp251xfd-tx.c",
            "drivers/net/can/sun4i_can.c",
            "drivers/net/can/ti_hecc.c",
            "drivers/net/can/usb/ems_usb.c",
            "drivers/net/can/usb/esd_usb.c",
            "drivers/net/can/usb/etas_es58x/es58x_core.c",
            "drivers/net/can/usb/gs_usb.c",
            "drivers/net/can/usb/kvaser_usb/kvaser_usb_core.c",
            "drivers/net/can/usb/mcba_usb.c",
            "drivers/net/can/usb/peak_usb/pcan_usb_core.c",
            "drivers/net/can/usb/ucan.c",
            "drivers/net/can/usb/usb_8dev.c",
            "drivers/net/can/xilinx_can.c",
            "include/linux/can/dev.h"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "386c49fe31ee748e053860b3bac7794a933ac9ac",
              "status": "affected",
              "version": "a6d190f8c7670068d8c154ef8477eca07b5e3574",
              "versionType": "git"
            },
            {
              "lessThan": "ae64438be1923e3c1102d90fd41db7afcfaf54cc",
              "status": "affected",
              "version": "a6d190f8c7670068d8c154ef8477eca07b5e3574",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "drivers/net/can/at91_can.c",
            "drivers/net/can/c_can/c_can_main.c",
            "drivers/net/can/can327.c",
            "drivers/net/can/cc770/cc770.c",
            "drivers/net/can/ctucanfd/ctucanfd_base.c",
            "drivers/net/can/dev/skb.c",
            "drivers/net/can/flexcan/flexcan-core.c",
            "drivers/net/can/grcan.c",
            "drivers/net/can/ifi_canfd/ifi_canfd.c",
            "drivers/net/can/janz-ican3.c",
            "drivers/net/can/kvaser_pciefd.c",
            "drivers/net/can/m_can/m_can.c",
            "drivers/net/can/mscan/mscan.c",
            "drivers/net/can/pch_can.c",
            "drivers/net/can/peak_canfd/peak_canfd.c",
            "drivers/net/can/rcar/rcar_can.c",
            "drivers/net/can/rcar/rcar_canfd.c",
            "drivers/net/can/sja1000/sja1000.c",
            "drivers/net/can/slcan/slcan-core.c",
            "drivers/net/can/softing/softing_main.c",
            "drivers/net/can/spi/hi311x.c",
            "drivers/net/can/spi/mcp251x.c",
            "drivers/net/can/spi/mcp251xfd/mcp251xfd-tx.c",
            "drivers/net/can/sun4i_can.c",
            "drivers/net/can/ti_hecc.c",
            "drivers/net/can/usb/ems_usb.c",
            "drivers/net/can/usb/esd_usb.c",
            "drivers/net/can/usb/etas_es58x/es58x_core.c",
            "drivers/net/can/usb/gs_usb.c",
            "drivers/net/can/usb/kvaser_usb/kvaser_usb_core.c",
            "drivers/net/can/usb/mcba_usb.c",
            "drivers/net/can/usb/peak_usb/pcan_usb_core.c",
            "drivers/net/can/usb/ucan.c",
            "drivers/net/can/usb/usb_8dev.c",
            "drivers/net/can/xilinx_can.c",
            "include/linux/can/dev.h"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "6.0"
            },
            {
              "lessThan": "6.0",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.0.*",
              "status": "unaffected",
              "version": "6.0.9",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "6.1",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    }
  ],
  "configurations": [
    {
      "nodes": [
        {
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "FB0E56F8-B415-4563-B3CC-33864CBCEA4E",
              "versionEndExcluding": "6.0.9",
              "versionStartIncluding": "6.0",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:6.1:rc1:*:*:*:*:*:*",
              "matchCriteriaId": "E7E331DA-1FB0-4DEC-91AC-7DA69D461C11",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:6.1:rc2:*:*:*:*:*:*",
              "matchCriteriaId": "17F0B248-42CF-4AE6-A469-BB1BAE7F4705",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:6.1:rc3:*:*:*:*:*:*",
              "matchCriteriaId": "E2422816-0C14-4B5E-A1E6-A9D776E5C49B",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:6.1:rc4:*:*:*:*:*:*",
              "matchCriteriaId": "1C6E00FE-5FB9-4D20-A1A1-5A32128F9B76",
              "vulnerable": true
            }
          ],
          "negate": false,
          "operator": "OR"
        }
      ]
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ncan: dev: fix skb drop check\n\nIn commit a6d190f8c767 (\"can: skb: drop tx skb if in listen only\nmode\") the priv-\u003ectrlmode element is read even on virtual CAN\ninterfaces that do not create the struct can_priv at startup. This\nout-of-bounds read may lead to CAN frame drops for virtual CAN\ninterfaces like vcan and vxcan.\n\nThis patch mainly reverts the original commit and adds a new helper\nfor CAN interface drivers that provide the required information in\nstruct can_priv.\n\n[mkl: patch pch_can, too]"
    },
    {
      "lang": "es",
      "value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: can: dev: fix skb drop check. En el commit a6d190f8c767 (\"can: skb: drop tx skb if in listen only mode\"), el elemento priv-\u0026gt;ctrlmode se lee incluso en interfaces CAN virtuales que no crean la estructura can_priv al inicio. Esta lectura fuera de los l\u00edmites puede provocar la p\u00e9rdida de tramas CAN en interfaces CAN virtuales como vcan y vxcan. Este parche revierte principalmente la confirmaci\u00f3n original y a\u00f1ade un nuevo asistente para los controladores de interfaz CAN que proporciona la informaci\u00f3n necesaria en la estructura can_priv. [mkl: parchear tambi\u00e9n pch_can]"
    }
  ],
  "id": "CVE-2022-49844",
  "lastModified": "2026-06-17T05:19:16.993",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "LOCAL",
          "availabilityImpact": "HIGH",
          "baseScore": 7.1,
          "baseSeverity": "HIGH",
          "confidentialityImpact": "HIGH",
          "integrityImpact": "NONE",
          "privilegesRequired": "LOW",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H",
          "version": "3.1"
        },
        "exploitabilityScore": 1.8,
        "impactScore": 5.2,
        "source": "nvd@nist.gov",
        "type": "Primary"
      },
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "LOCAL",
          "availabilityImpact": "HIGH",
          "baseScore": 7.1,
          "baseSeverity": "HIGH",
          "confidentialityImpact": "HIGH",
          "integrityImpact": "NONE",
          "privilegesRequired": "LOW",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H",
          "version": "3.1"
        },
        "exploitabilityScore": 1.8,
        "impactScore": 5.2,
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "type": "Secondary"
      }
    ],
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "id": "CVE-2022-49844",
          "options": [
            {
              "exploitation": "none"
            },
            {
              "automatable": "no"
            },
            {
              "technicalImpact": "total"
            }
          ],
          "role": "CISA Coordinator",
          "timestamp": "2025-10-01T17:00:29.049207Z",
          "version": "2.0.3"
        }
      }
    ]
  },
  "published": "2025-05-01T15:16:07.907",
  "references": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "tags": [
        "Patch"
      ],
      "url": "https://git.kernel.org/stable/c/386c49fe31ee748e053860b3bac7794a933ac9ac"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "tags": [
        "Patch"
      ],
      "url": "https://git.kernel.org/stable/c/ae64438be1923e3c1102d90fd41db7afcfaf54cc"
    }
  ],
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "vulnStatus": "Modified",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-125"
        }
      ],
      "source": "nvd@nist.gov",
      "type": "Primary"
    },
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-125"
        }
      ],
      "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
      "type": "Secondary"
    }
  ]
}



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