Vulnerability-Lookup

GHSA-RMQP-6X5X-G7FG

Vulnerability from github – Published: 2024-05-21 15:31 – Updated: 2024-07-03 18:42

Details

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

can: j1939: fix Use-after-Free, hold skb ref while in use

This patch fixes a Use-after-Free found by the syzbot.

The problem is that a skb is taken from the per-session skb queue, without incrementing the ref count. This leads to a Use-after-Free if the skb is taken concurrently from the session queue due to a CTS.

Severity ?

8.4 (High)


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

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{
  "affected": [],
  "aliases": [
    "CVE-2021-47232"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-416"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2024-05-21T15:15:12Z",
    "severity": "HIGH"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\ncan: j1939: fix Use-after-Free, hold skb ref while in use\n\nThis patch fixes a Use-after-Free found by the syzbot.\n\nThe problem is that a skb is taken from the per-session skb queue,\nwithout incrementing the ref count. This leads to a Use-after-Free if\nthe skb is taken concurrently from the session queue due to a CTS.",
  "id": "GHSA-rmqp-6x5x-g7fg",
  "modified": "2024-07-03T18:42:42Z",
  "published": "2024-05-21T15:31:40Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2021-47232"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/1071065eeb33d32b7d98c2ce7591881ae7381705"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/2030043e616cab40f510299f09b636285e0a3678"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/22cba878abf646cd3a02ee7c8c2cef7afe66a256"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/509ab6bfdd0c76daebbad0f0af07da712116de22"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
      "type": "CVSS_V3"
    }
  ]
}

CVE-2021-47232 (GCVE-0-2021-47232)

Vulnerability from cvelistv5 – Published: 2024-05-21 14:19 – Updated: 2025-05-04 07:06

Title

can: j1939: fix Use-after-Free, hold skb ref while in use

Summary

In the Linux kernel, the following vulnerability has been resolved: can: j1939: fix Use-after-Free, hold skb ref while in use This patch fixes a Use-after-Free found by the syzbot. The problem is that a skb is taken from the per-session skb queue, without incrementing the ref count. This leads to a Use-after-Free if the skb is taken concurrently from the session queue due to a CTS.

Severity ?

8.4 (High)


                        
                          CVSS:3.1/AV:L/AC:L/PR:N/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/22cba878abf646cd3…
	https://git.kernel.org/stable/c/509ab6bfdd0c76dae…
	https://git.kernel.org/stable/c/1071065eeb33d32b7…
	https://git.kernel.org/stable/c/2030043e616cab40f…

Impacted products

Vendor

Product

Version

Linux

Affected: 9d71dd0c70099914fcd063135da3c580865e924c , < 22cba878abf646cd3a02ee7c8c2cef7afe66a256 (git)
Affected: 9d71dd0c70099914fcd063135da3c580865e924c , < 509ab6bfdd0c76daebbad0f0af07da712116de22 (git)
Affected: 9d71dd0c70099914fcd063135da3c580865e924c , < 1071065eeb33d32b7d98c2ce7591881ae7381705 (git)
Affected: 9d71dd0c70099914fcd063135da3c580865e924c , < 2030043e616cab40f510299f09b636285e0a3678 (git)

Linux

Affected: 5.4
Unaffected: 0 , < 5.4 (semver)
Unaffected: 5.4.128 , ≤ 5.4.* (semver)
Unaffected: 5.10.46 , ≤ 5.10.* (semver)
Unaffected: 5.12.13 , ≤ 5.12.* (semver)
Unaffected: 5.13 , ≤ * (original_commit_for_fix)

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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-RMQP-6X5X-G7FG

CVE-2021-47232 (GCVE-0-2021-47232)

Tags

Sightings

Nomenclature