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CVE-2024-42108 (GCVE-0-2024-42108)

Vulnerability from cvelistv5 – Published: 2024-07-30 07:46 – Updated: 2026-08-05 11:35
VLAI
Title
net: rswitch: Avoid use-after-free in rswitch_poll()
Summary
In the Linux kernel, the following vulnerability has been resolved: net: rswitch: Avoid use-after-free in rswitch_poll() The use-after-free is actually in rswitch_tx_free(), which is inlined in rswitch_poll(). Since `skb` and `gq->skbs[gq->dirty]` are in fact the same pointer, the skb is first freed using dev_kfree_skb_any(), then the value in skb->len is used to update the interface statistics. Let's move around the instructions to use skb->len before the skb is freed. This bug is trivial to reproduce using KFENCE. It will trigger a splat every few packets. A simple ARP request or ICMP echo request is enough.
Severity
9.8 (Critical)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
SSVC
Exploitation: none Automatable: no Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2024-09-10 16:17 UTC
Assigner
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: 0aeec4bb6a9fc963932bf3c929bdf27d835d44e9 , < 4a41bb9f2b402469d425a1c13359d3b3ea4e6403 (git)
Affected: 271e015b91535dd87fd0f5df0cc3b906c2eddef9 , < 92cbbe7759193e3418f38d0d73f8fe125312c58b (git)
Affected: 271e015b91535dd87fd0f5df0cc3b906c2eddef9 , < 9a0c28efeec6383ef22e97437616b920e7320b67 (git)
guessed Create a notification for this product.
Linux Linux Affected: 6.8
Unaffected: 0 , < 6.8 (semver)
Unaffected: 6.9.9 , ≤ 6.9.* (semver)
Unaffected: 6.10 , ≤ * (original_commit_for_fix)
guessed Create a notification for this product.
Show details on NVD website
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      "product_status:known_not_affected": "198",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "kernel: net: rswitch: Avoid use-after-free in rswitch_poll()",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2024/cve-2024-42108.json",
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      "url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2024-42108.json",
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            ],
            "title": "CVE Program Container"
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          {
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                    "id": "CVE-2024-42108",
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                      {
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                    "role": "CISA Coordinator",
                    "timestamp": "2024-09-10T16:17:39.409257Z",
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            }
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          "providerMetadata": {
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            {
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          ],
          "title": "net: rswitch: Avoid use-after-free in rswitch_poll()",
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      "cveMetadata": {
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        "datePublished": "2024-07-30T07:46:03.517Z",
        "dateReserved": "2024-07-29T15:50:41.176Z",
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        "state": "PUBLISHED"
      },
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  }
}



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Taxonomy of the tags.





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

Author Source Type Date Other

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.


Related by attack behaviour

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.