GHSA-JJG4-P57C-87J3

Vulnerability from github – Published: 2025-05-01 15:31 – Updated: 2025-05-07 15:31
VLAI
Details

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
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{
  "affected": [],
  "aliases": [
    "CVE-2022-49844"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-125"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2025-05-01T15:16:07Z",
    "severity": "HIGH"
  },
  "details": "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]",
  "id": "GHSA-jjg4-p57c-87j3",
  "modified": "2025-05-07T15:31:24Z",
  "published": "2025-05-01T15:31:49Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2022-49844"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/386c49fe31ee748e053860b3bac7794a933ac9ac"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/ae64438be1923e3c1102d90fd41db7afcfaf54cc"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H",
      "type": "CVSS_V3"
    }
  ]
}



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