Vulnerability-Lookup

GHSA-RQGX-3Q58-H4H3

Vulnerability from github – Published: 2024-09-18 09:30 – Updated: 2024-09-23 18:30

Details

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

net: ethernet: ti: am65-cpsw: Fix NULL dereference on XDP_TX

If number of TX queues are set to 1 we get a NULL pointer dereference during XDP_TX.

~# ethtool -L eth0 tx 1 ~# ./xdp-trafficgen udp -A -a eth0 -t 2 Transmitting on eth0 (ifindex 2) [ 241.135257] Unable to handle kernel NULL pointer dereference at virtual address 0000000000000030

Fix this by using actual TX queues instead of max TX queues when picking the TX channel in am65_cpsw_ndo_xdp_xmit().

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-2024-46799"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-476"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2024-09-18T08:15:06Z",
    "severity": "MODERATE"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet: ethernet: ti: am65-cpsw: Fix NULL dereference on XDP_TX\n\nIf number of TX queues are set to 1 we get a NULL pointer\ndereference during XDP_TX.\n\n~# ethtool -L eth0 tx 1\n~# ./xdp-trafficgen udp -A \u003cipv6-src\u003e -a \u003cipv6-dst\u003e eth0 -t 2\nTransmitting on eth0 (ifindex 2)\n[  241.135257] Unable to handle kernel NULL pointer dereference at virtual address 0000000000000030\n\nFix this by using actual TX queues instead of max TX queues\nwhen picking the TX channel in am65_cpsw_ndo_xdp_xmit().",
  "id": "GHSA-rqgx-3q58-h4h3",
  "modified": "2024-09-23T18:30:34Z",
  "published": "2024-09-18T09:30:37Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2024-46799"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/0a50c35277f96481a5a6ed5faf347f282040c57d"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/2e7189d2b1de51fc2567676cd4f96c0fe0960b9f"
    }
  ],
  "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-2024-46799 (GCVE-0-2024-46799)

Vulnerability from cvelistv5 – Published: 2024-09-18 07:12 – Updated: 2026-08-05 11:38

Title

net: ethernet: ti: am65-cpsw: Fix NULL dereference on XDP_TX

Summary

In the Linux kernel, the following vulnerability has been resolved: net: ethernet: ti: am65-cpsw: Fix NULL dereference on XDP_TX If number of TX queues are set to 1 we get a NULL pointer dereference during XDP_TX. ~# ethtool -L eth0 tx 1 ~# ./xdp-trafficgen udp -A <ipv6-src> -a <ipv6-dst> eth0 -t 2 Transmitting on eth0 (ifindex 2) [ 241.135257] Unable to handle kernel NULL pointer dereference at virtual address 0000000000000030 Fix this by using actual TX queues instead of max TX queues when picking the TX channel in am65_cpsw_ndo_xdp_xmit().

Severity

7.5 (High)


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

SSVC

Exploitation: none Automatable: no Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2024-09-29 14:21 UTC

Assigner

Linux mitre root Scorecard

References

2 references

URL	Tags
https://git.kernel.org/stable/c/2e7189d2b1de51fc2…
https://git.kernel.org/stable/c/0a50c35277f96481a…

Impacted products

2 products

Vendor	Product	Version
Linux	Linux	Affected: 8acacc40f7337527ff84cd901ed2ef0a2b95b2b6 , < 2e7189d2b1de51fc2567676cd4f96c0fe0960b9f (git) Affected: 8acacc40f7337527ff84cd901ed2ef0a2b95b2b6 , < 0a50c35277f96481a5a6ed5faf347f282040c57d (git)
Linux	Linux	Affected: 6.10 Unaffected: 0 , < 6.10 (semver) Unaffected: 6.10.10 , ≤ 6.10.* (semver) Unaffected: 6.11 , ≤ * (original_commit_for_fix)

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                "id": "CVE-2024-46799",
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                  },
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                "role": "CISA Coordinator",
                "timestamp": "2024-09-29T14:21:59.771097Z",
                "version": "2.0.3"
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          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
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      }
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          ],
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          "versions": [
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          "versions": [
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              "version": "6.10"
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                  "versionStartIncluding": "6.10",
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                  "vulnerable": true
                }
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              "negate": false,
              "operator": "OR"
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          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet: ethernet: ti: am65-cpsw: Fix NULL dereference on XDP_TX\n\nIf number of TX queues are set to 1 we get a NULL pointer\ndereference during XDP_TX.\n\n~# ethtool -L eth0 tx 1\n~# ./xdp-trafficgen udp -A \u003cipv6-src\u003e -a \u003cipv6-dst\u003e eth0 -t 2\nTransmitting on eth0 (ifindex 2)\n[  241.135257] Unable to handle kernel NULL pointer dereference at virtual address 0000000000000030\n\nFix this by using actual TX queues instead of max TX queues\nwhen picking the TX channel in am65_cpsw_ndo_xdp_xmit()."
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          },
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            {
              "lang": "en",
              "value": "AV:N - The vulnerable function is the XDP_REDIRECT egress hook, invoked from `bq_xmit_all()` while processing received network frames, so a remote sender\u0027s packet drives the code path on an XDP-forwarding TI CPSW gateway. No local access to the target is required to deliver the triggering frame.\nAC:L - Given the vulnerable configuration (TX channels reduced below CPU count with an XDP redirect program attached), every redirected frame handled on a CPU index at or above `tx_ch_num` faults deterministically, and with one TX channel that is most CPUs on a 4- or 8-core SoC. The attacker can further steer which RX CPU handles the flow by varying source ports, so no condition outside their control must align.\nPR:N - Triggering only requires sending a frame that the already-loaded XDP program redirects out the CPSW port; no credentials or account on the target are needed. The privileged steps (`ethtool -L`, XDP attach) are the administrator\u0027s configuration, not part of the attack.\nUI:N - The crash occurs autonomously in softirq/NAPI context as soon as a redirected frame is processed. No victim action is required.\nS:U - The fault is confined to the kernel of the affected host; no VM, IOMMU, or sandbox boundary is crossed. Impact stays within the same security authority.\nC:N - The index stays inside the fixed 8-element `tx_chns[]` array, so there is no out-of-bounds read, and the dereference is of a NULL `desc_pool` at a small fixed offset. No kernel memory contents are read or disclosed.\nI:N - No out-of-bounds or use-after-free write occurs; the faulting address is in the unmappable low page (blocked by `mmap_min_addr` and arm64 PAN), so no write or control-flow primitive is available. Nothing is modified before the oops.\nA:H - The NULL dereference produces a kernel oops in softirq/NAPI context, killing the network datapath and typically panicking the system on embedded configurations with `panic_on_oops`. It repeats on every redirected packet, so the denial of service is total and sustained."
            }
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      "title": "net: ethernet: ti: am65-cpsw: Fix NULL dereference on XDP_TX",
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    "datePublished": "2024-09-18T07:12:53.508Z",
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    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

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-RQGX-3Q58-H4H3

CVE-2024-46799 (GCVE-0-2024-46799)

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