github - ghsa-677p-h2hj-9j82

GHSA-677P-H2HJ-9J82

Vulnerability from github – Published: 2025-04-17 18:31 – Updated: 2025-04-17 21:31

Details

In the Linux kernel, the following vulnerability has been resolved:

can: vxcan: vxcan_xmit: fix use after free bug

After calling netif_rx_ni(skb), dereferencing skb is unsafe. Especially, the canfd_frame cfd which aliases skb memory is accessed after the netif_rx_ni().

Severity ?

7.8 (High)


                  
                    CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

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{
  "affected": [],
  "aliases": [
    "CVE-2021-47669"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-416"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2025-04-17T18:15:43Z",
    "severity": "HIGH"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\ncan: vxcan: vxcan_xmit: fix use after free bug\n\nAfter calling netif_rx_ni(skb), dereferencing skb is unsafe.\nEspecially, the canfd_frame cfd which aliases skb memory is accessed\nafter the netif_rx_ni().",
  "id": "GHSA-677p-h2hj-9j82",
  "modified": "2025-04-17T21:31:04Z",
  "published": "2025-04-17T18:31:22Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2021-47669"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/6d6dcf2399cdd26f7f5426ca8dd8366b7f2ca105"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/75854cad5d80976f6ea0f0431f8cedd3bcc475cb"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/9b820875a32a3443d67bfd368e93038354e98052"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/a24476b37167816e6352ca1a2cf3769847774f70"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/e771a874076115df8bff27d325edfd2340e4ec69"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
      "type": "CVSS_V3"
    }
  ]
}

CVE-2021-47669 (GCVE-0-2021-47669)

Vulnerability from cvelistv5 – Published: 2025-04-17 18:01 – Updated: 2025-05-04 07:15

Summary

In the Linux kernel, the following vulnerability has been resolved: can: vxcan: vxcan_xmit: fix use after free bug After calling netif_rx_ni(skb), dereferencing skb is unsafe. Especially, the canfd_frame cfd which aliases skb memory is accessed after the netif_rx_ni().

Severity ?

7.8 (High)


                        
                          CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

CWE

CWE-416 - Use After Free

Assigner

Linux

References

URL

Tags

	https://git.kernel.org/stable/c/6d6dcf2399cdd26f7…
	https://git.kernel.org/stable/c/9b820875a32a3443d…
	https://git.kernel.org/stable/c/a24476b37167816e6…
	https://git.kernel.org/stable/c/e771a874076115df8…
	https://git.kernel.org/stable/c/75854cad5d80976f6…

Impacted products

Vendor

Product

Version

Linux

Affected: a8f820a380a2a06fc4fe1a54159067958f800929 , < 6d6dcf2399cdd26f7f5426ca8dd8366b7f2ca105 (git)
Affected: a8f820a380a2a06fc4fe1a54159067958f800929 , < 9b820875a32a3443d67bfd368e93038354e98052 (git)
Affected: a8f820a380a2a06fc4fe1a54159067958f800929 , < a24476b37167816e6352ca1a2cf3769847774f70 (git)
Affected: a8f820a380a2a06fc4fe1a54159067958f800929 , < e771a874076115df8bff27d325edfd2340e4ec69 (git)
Affected: a8f820a380a2a06fc4fe1a54159067958f800929 , < 75854cad5d80976f6ea0f0431f8cedd3bcc475cb (git)

Linux

Affected: 4.12
Unaffected: 0 , < 4.12 (semver)
Unaffected: 4.14.218 , ≤ 4.14.* (semver)
Unaffected: 4.19.171 , ≤ 4.19.* (semver)
Unaffected: 5.4.93 , ≤ 5.4.* (semver)
Unaffected: 5.10.11 , ≤ 5.10.* (semver)
Unaffected: 5.11 , ≤ * (original_commit_for_fix)

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        "metrics": [
          {
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              "attackComplexity": "LOW",
              "attackVector": "LOCAL",
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              "confidentialityImpact": "HIGH",
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              "content": {
                "id": "CVE-2021-47669",
                "options": [
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                "timestamp": "2025-04-17T18:17:52.149604Z",
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              "status": "unaffected",
              "version": "5.10.11",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "5.11",
              "versionType": "original_commit_for_fix"
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          ]
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      ],
      "cpeApplicability": [
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Sightings

Author	Source	Type	Date

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.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
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.

Detection rules are retrieved from Rulezet.

Action not permitted

GHSA-677P-H2HJ-9J82

CVE-2021-47669 (GCVE-0-2021-47669)

Tags

Sightings

Nomenclature