github - ghsa-pwwc-8qxc-5w7f

GHSA-PWWC-8QXC-5W7F

Vulnerability from github – Published: 2024-02-27 21:31 – Updated: 2024-08-01 15:31

Details

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

net: qrtr: Avoid potential use after free in MHI send

It is possible that the MHI ul_callback will be invoked immediately following the queueing of the skb for transmission, leading to the callback decrementing the refcount of the associated sk and freeing the skb.

As such the dereference of skb and the increment of the sk refcount must happen before the skb is queued, to avoid the skb to be used after free and potentially the sk to drop its last refcount..

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-2021-46973"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-416"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2024-02-27T19:04:07Z",
    "severity": "HIGH"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet: qrtr: Avoid potential use after free in MHI send\n\nIt is possible that the MHI ul_callback will be invoked immediately\nfollowing the queueing of the skb for transmission, leading to the\ncallback decrementing the refcount of the associated sk and freeing the\nskb.\n\nAs such the dereference of skb and the increment of the sk refcount must\nhappen before the skb is queued, to avoid the skb to be used after free\nand potentially the sk to drop its last refcount..",
  "id": "GHSA-pwwc-8qxc-5w7f",
  "modified": "2024-08-01T15:31:28Z",
  "published": "2024-02-27T21:31:27Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2021-46973"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/03c649dee8b1eb5600212a249542a70f47a5ab40"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/47a017f33943278570c072bc71681809b2567b3a"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/48ec949ac979b4b42d740f67b6177797af834f80"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/ea474054c2cc6e1284604b21361f475c7cc8c0a0"
    }
  ],
  "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-2021-46973 (GCVE-0-2021-46973)

Vulnerability from cvelistv5 – Published: 2024-02-27 18:47 – Updated: 2025-05-04 07:01

Summary

In the Linux kernel, the following vulnerability has been resolved: net: qrtr: Avoid potential use after free in MHI send It is possible that the MHI ul_callback will be invoked immediately following the queueing of the skb for transmission, leading to the callback decrementing the refcount of the associated sk and freeing the skb. As such the dereference of skb and the increment of the sk refcount must happen before the skb is queued, to avoid the skb to be used after free and potentially the sk to drop its last refcount..

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/48ec949ac979b4b42…
	https://git.kernel.org/stable/c/ea474054c2cc6e128…
	https://git.kernel.org/stable/c/03c649dee8b1eb560…
	https://git.kernel.org/stable/c/47a017f3394327857…

Impacted products

Vendor

Product

Version

Linux

Affected: 6e728f321393b1fce9e1c2c3e55f9f7c15991321 , < 48ec949ac979b4b42d740f67b6177797af834f80 (git)
Affected: 6e728f321393b1fce9e1c2c3e55f9f7c15991321 , < ea474054c2cc6e1284604b21361f475c7cc8c0a0 (git)
Affected: 6e728f321393b1fce9e1c2c3e55f9f7c15991321 , < 03c649dee8b1eb5600212a249542a70f47a5ab40 (git)
Affected: 6e728f321393b1fce9e1c2c3e55f9f7c15991321 , < 47a017f33943278570c072bc71681809b2567b3a (git)

Linux

Affected: 5.8
Unaffected: 0 , < 5.8 (semver)
Unaffected: 5.10.35 , ≤ 5.10.* (semver)
Unaffected: 5.11.19 , ≤ 5.11.* (semver)
Unaffected: 5.12.2 , ≤ 5.12.* (semver)
Unaffected: 5.13 , ≤ * (original_commit_for_fix)

Show details on NVD website

JSON

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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-PWWC-8QXC-5W7F

CVE-2021-46973 (GCVE-0-2021-46973)

Tags

Sightings

Nomenclature