Vulnerability-Lookup

GHSA-4QWW-PQQ9-XRW5

Vulnerability from github – Published: 2024-09-04 21:30 – Updated: 2025-11-04 00:31

Details

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

net/mlx5e: SHAMPO, Fix invalid WQ linked list unlink

When all the strides in a WQE have been consumed, the WQE is unlinked from the WQ linked list (mlx5_wq_ll_pop()). For SHAMPO, it is possible to receive CQEs with 0 consumed strides for the same WQE even after the WQE is fully consumed and unlinked. This triggers an additional unlink for the same wqe which corrupts the linked list.

Fix this scenario by accepting 0 sized consumed strides without unlinking the WQE again.

Severity

5.5 (Medium)


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

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{
  "affected": [],
  "aliases": [
    "CVE-2024-44970"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2024-09-04T19:15:31Z",
    "severity": "MODERATE"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet/mlx5e: SHAMPO, Fix invalid WQ linked list unlink\n\nWhen all the strides in a WQE have been consumed, the WQE is unlinked\nfrom the WQ linked list (mlx5_wq_ll_pop()). For SHAMPO, it is possible\nto receive CQEs with 0 consumed strides for the same WQE even after the\nWQE is fully consumed and unlinked. This triggers an additional unlink\nfor the same wqe which corrupts the linked list.\n\nFix this scenario by accepting 0 sized consumed strides without\nunlinking the WQE again.",
  "id": "GHSA-4qww-pqq9-xrw5",
  "modified": "2025-11-04T00:31:21Z",
  "published": "2024-09-04T21:30:32Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2024-44970"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/50d8009a0ac02c3311b23a0066511f8337bd88d9"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/650e24748e1e0a7ff91d5c72b72a2f2a452b5b76"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/7b379353e9144e1f7460ff15f39862012c9d0d78"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/fba8334721e266f92079632598e46e5f89082f30"
    },
    {
      "type": "WEB",
      "url": "https://lists.debian.org/debian-lts-announce/2025/01/msg00001.html"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
      "type": "CVSS_V3"
    }
  ]
}

CVE-2024-44970 (GCVE-0-2024-44970)

Vulnerability from cvelistv5 – Published: 2024-09-04 18:56 – Updated: 2026-08-05 11:37

Title

net/mlx5e: SHAMPO, Fix invalid WQ linked list unlink

Summary

In the Linux kernel, the following vulnerability has been resolved: net/mlx5e: SHAMPO, Fix invalid WQ linked list unlink When all the strides in a WQE have been consumed, the WQE is unlinked from the WQ linked list (mlx5_wq_ll_pop()). For SHAMPO, it is possible to receive CQEs with 0 consumed strides for the same WQE even after the WQE is fully consumed and unlinked. This triggers an additional unlink for the same wqe which corrupts the linked list. Fix this scenario by accepting 0 sized consumed strides without unlinking the WQE again.

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 17:39 UTC

Assigner

Linux mitre root Scorecard

References

5 references

URL	Tags
https://git.kernel.org/stable/c/7b379353e9144e1f7…
https://git.kernel.org/stable/c/650e24748e1e0a7ff…
https://git.kernel.org/stable/c/50d8009a0ac02c331…
https://git.kernel.org/stable/c/fba8334721e266f92…
https://lists.debian.org/debian-lts-announce/2025…

Impacted products

2 products

Vendor	Product	Version
Linux	Linux	Affected: f97d5c2a453e26071e3b0ec12161de57c4a237c4 , < 7b379353e9144e1f7460ff15f39862012c9d0d78 (git) Affected: f97d5c2a453e26071e3b0ec12161de57c4a237c4 , < 650e24748e1e0a7ff91d5c72b72a2f2a452b5b76 (git) Affected: f97d5c2a453e26071e3b0ec12161de57c4a237c4 , < 50d8009a0ac02c3311b23a0066511f8337bd88d9 (git) Affected: f97d5c2a453e26071e3b0ec12161de57c4a237c4 , < fba8334721e266f92079632598e46e5f89082f30 (git)
Linux	Linux	Affected: 5.16 Unaffected: 0 , < 5.16 (semver) Unaffected: 6.1.105 , ≤ 6.1.* (semver) Unaffected: 6.6.46 , ≤ 6.6.* (semver) Unaffected: 6.10.5 , ≤ 6.10.* (semver) Unaffected: 6.11 , ≤ * (original_commit_for_fix)

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{
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            "other": {
              "content": {
                "id": "CVE-2024-44970",
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                    "Automatable": "no"
                  },
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                    "Technical Impact": "partial"
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                "role": "CISA Coordinator",
                "timestamp": "2024-09-10T17:39:17.730265Z",
                "version": "2.0.3"
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              "value": "AV:N - The vulnerable code is the mlx5e RX completion handler, driven entirely by CQEs the NIC generates while receiving packets from the wire; a remote, routable attacker sending TCP traffic to the host reaches it with no local access. This is the network stack\u0027s receive path, not a syscall or ioctl interface.\nAC:L - The attacker controls the entire traffic pattern (flow count, segment sizes, session-flush triggers, packet rate) that drives SHAMPO coalescing to WQE boundaries, and can sustain it at line rate indefinitely, so the zero-consumed-strides CQE condition is hit repeatedly and reliably. There is no race against an uncontrolled party and no memory-layout precondition for the trigger.\nPR:N - No account, credentials, or authentication of any kind are required \u2014 the corruption happens in the NAPI RX completion path before any socket or protocol authorization layer is consulted. The attacker only needs to send packets that the NIC receives.\nUI:N - Packet processing happens automatically in the driver\u0027s NAPI poll; no administrator or user action is needed once the interface is up and receiving traffic.\nS:U - The corrupted WQ linked list, the underflowed cur_sz counter, and the prematurely released page-pool pages all belong to the host kernel\u0027s own RX ring. No hypervisor, IOMMU, or sandbox boundary is crossed.\nC:H - The self-referencing free list and cur_sz underflow cause page-pool pages to be released while still referenced by outstanding hardware descriptors and in-flight skbs, so recycled kernel memory contents can be cross-attributed into packets delivered up the stack to userspace. Memory corruption of this class provides an arbitrary kernel-memory disclosure primitive.\nI:H - After the free-list self-loop stalls head advancement, mlx5e_post_rx_mpwqes() releases pages for which a UMR and RX WQE were already posted, so the NIC keeps DMA\u0027ing fully attacker-controlled packet bytes into freed and reallocated kernel pages \u2014 an arbitrary-content write into reused kernel memory, leverageable for control-flow hijacking. The driver additionally writes through a stale tail_next pointer.\nA:H - The corrupted linked list permanently stalls RQ replenishment and loses network connectivity, and the teardown path (mlx5e_free_rx_descs on link down, MTU change, or RQ recovery) spins re-deallocating the same WQE up to 65535 times, driving page refcount underflow and kernel oops/panic."
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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.

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
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GHSA-4QWW-PQQ9-XRW5

CVE-2024-44970 (GCVE-0-2024-44970)

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