CVE-2022-49844 (GCVE-0-2022-49844)

Vulnerability from cvelistv5 – Published: 2025-05-01 14:09 – Updated: 2026-08-05 08:56
VLAI
Title
can: dev: fix skb drop check
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]
Severity
7.1 (High)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H
SSVC
Exploitation: none Automatable: no Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2025-10-01 17:00 UTC
CWE
Assigner
Linux CNA under the mitre root
CNA scorecard D 53/100 over 7033 records in the last 180 days details
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: a6d190f8c7670068d8c154ef8477eca07b5e3574 , < 386c49fe31ee748e053860b3bac7794a933ac9ac (git)
Affected: a6d190f8c7670068d8c154ef8477eca07b5e3574 , < ae64438be1923e3c1102d90fd41db7afcfaf54cc (git)
guessed Create a notification for this product.
Linux Linux Affected: 6.0
Unaffected: 0 , < 6.0 (semver)
Unaffected: 6.0.9 , ≤ 6.0.* (semver)
Unaffected: 6.1 , ≤ * (original_commit_for_fix)
guessed Create a notification for this product.
Show details on NVD website
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            "drivers/net/can/peak_canfd/peak_canfd.c",
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            "drivers/net/can/sja1000/sja1000.c",
            "drivers/net/can/slcan/slcan-core.c",
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            "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",
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            "drivers/net/can/usb/ems_usb.c",
            "drivers/net/can/usb/esd_usb.c",
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            "drivers/net/can/usb/mcba_usb.c",
            "drivers/net/can/usb/peak_usb/pcan_usb_core.c",
            "drivers/net/can/usb/ucan.c",
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            "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]"
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        "id": "CVE-2022-49844",
        "lastModified": "2026-06-17T05:19:16.993",
        "metrics": {
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                "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"
          }
        ]
      }
    },
    "redhat_vex": {
      "aggregate_severity": "Moderate",
      "current_release_date": "2026-06-29T21:19:06+00:00",
      "cve": "CVE-2022-49844",
      "id": "CVE-2022-49844",
      "initial_release_date": "2022-01-01T00:00:00+00:00",
      "product_status:known_affected": "150",
      "product_status:known_not_affected": "124",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "kernel: can: dev: fix skb drop check",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2022/cve-2022-49844.json",
      "version": "3"
    },
    "suse_vex": {
      "aggregate_severity": "moderate",
      "current_release_date": "2026-10-17T01:19:23Z",
      "cve": "CVE-2022-49844",
      "id": "CVE-2022-49844",
      "initial_release_date": "2025-05-09T04:55:11Z",
      "product_status:known_affected": "0",
      "product_status:known_not_affected": "507",
      "source": "SUSE CSAF VEX",
      "status": "interim",
      "title": "SUSE CVE CVE-2022-49844",
      "url": "https://ftp.suse.com/pub/projects/security/csaf-vex/2025/cve-2022-49844.json",
      "version": "11"
    },
    "vulnrichment": {
      "containers": {
        "adp": [
          {
            "metrics": [
              {
                "cvssV3_1": {
                  "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"
                }
              },
              {
                "other": {
                  "content": {
                    "id": "CVE-2022-49844",
                    "options": [
                      {
                        "Exploitation": "none"
                      },
                      {
                        "Automatable": "no"
                      },
                      {
                        "Technical Impact": "total"
                      }
                    ],
                    "role": "CISA Coordinator",
                    "timestamp": "2025-10-01T17:00:29.049207Z",
                    "version": "2.0.3"
                  },
                  "type": "ssvc"
                }
              }
            ],
            "problemTypes": [
              {
                "descriptions": [
                  {
                    "cweId": "CWE-125",
                    "description": "CWE-125 Out-of-bounds Read",
                    "lang": "en",
                    "type": "CWE"
                  }
                ]
              }
            ],
            "providerMetadata": {
              "dateUpdated": "2025-10-01T14:34:39.476Z",
              "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
              "shortName": "CISA-ADP"
            },
            "title": "CISA ADP Vulnrichment"
          }
        ],
        "cna": {
          "affected": [
            {
              "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"
                },
                {
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                  "status": "unaffected",
                  "version": "0",
                  "versionType": "semver"
                },
                {
                  "lessThanOrEqual": "6.0.*",
                  "status": "unaffected",
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                  "versionType": "semver"
                },
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                  "lessThanOrEqual": "*",
                  "status": "unaffected",
                  "version": "6.1",
                  "versionType": "original_commit_for_fix"
                }
              ]
            }
          ],
          "cpeApplicability": [
            {
              "nodes": [
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                  "cpeMatch": [
                    {
                      "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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                      "versionStartIncluding": "6.0",
                      "vulnerable": true
                    },
                    {
                      "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                      "versionEndExcluding": "6.1",
                      "versionStartIncluding": "6.0",
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                    }
                  ],
                  "negate": false,
                  "operator": "OR"
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              ]
            }
          ],
          "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]"
            }
          ],
          "providerMetadata": {
            "dateUpdated": "2025-05-04T08:46:44.354Z",
            "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "shortName": "Linux"
          },
          "references": [
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              "url": "https://git.kernel.org/stable/c/386c49fe31ee748e053860b3bac7794a933ac9ac"
            },
            {
              "url": "https://git.kernel.org/stable/c/ae64438be1923e3c1102d90fd41db7afcfaf54cc"
            }
          ],
          "title": "can: dev: fix skb drop check",
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            "engine": "bippy-1.2.0"
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        }
      },
      "cveMetadata": {
        "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "assignerShortName": "Linux",
        "cveId": "CVE-2022-49844",
        "datePublished": "2025-05-01T14:09:58.999Z",
        "dateReserved": "2025-05-01T14:05:17.229Z",
        "dateUpdated": "2025-10-01T17:00:34.409Z",
        "state": "PUBLISHED"
      },
      "dataType": "CVE_RECORD",
      "dataVersion": "5.1"
    }
  }
}



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Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

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Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
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  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.
Vulnerability timeline

Sightings and recorded dates, grouped by day · UTC

JSON
How durations are calculated

Following the VTEM framework (Black Hat USA 2015), time to patch starts when the vendor or a coordinator was informed, total time to patch at discovery, and disclosure to patch at public disclosure; vendor response time runs from the report to its acknowledgement. Time to exploit and time unpatched start at the earliest discovery or report, falling back to public disclosure. Unpatched time ends at the first recorded patch, or the calculation time when no patch is recorded. Exploitation to patch shows the interval between those two events; a published proof of concept is a public exploit, not exploitation.

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    Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.