Vulnerability-Lookup

FKIE_CVE-2026-53132

Vulnerability from fkie_nvd - Published: 2026-06-25 09:16 - Updated: 2026-07-06 15:23

Severity

7.1 (High) - CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H

Summary

In the Linux kernel, the following vulnerability has been resolved: vsock/virtio: fix potential unbounded skb queue virtio_transport_inc_rx_pkt() checks vvs->rx_bytes + len > vvs->buf_alloc. virtio_transport_recv_enqueue() skips coalescing for packets with VIRTIO_VSOCK_SEQ_EOM. If fed with packets with len == 0 and VIRTIO_VSOCK_SEQ_EOM, a very large number of packets can be queued because vvs->rx_bytes stays at 0. Fix this by estimating the skb metadata size: (Number of skbs in the queue) * SKB_TRUESIZE(0)

References

URL	Tags
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/059b7dbd20a6f0c539a45ddff1573cb8946685b5	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/100d5b2ffdc6468b9e48532641f29e83efdcb63c	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/1eca304f97a34ed5e921e1f0e06c8b241f25bf12	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/9bdc637fde66b63d6cad0caacd034888bb7bf5f5	Patch

Impacted products

Vendor	Product	Version
linux	linux_kernel	*
linux	linux_kernel	*
linux	linux_kernel	*
linux	linux_kernel	*
linux	linux_kernel	6.3
linux	linux_kernel	6.3
linux	linux_kernel	6.3
linux	linux_kernel	6.3
linux	linux_kernel	6.3
linux	linux_kernel	6.3
linux	linux_kernel	7.1
linux	linux_kernel	7.1

JSON

To clipboard

{
  "affected": [
    {
      "affectedData": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "net/vmw_vsock/virtio_transport_common.c"
          ],
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              "version": "077706165717686a2a6a71405fef036cd5b37ae0",
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            },
            {
              "status": "affected",
              "version": "5852a2b573f7a3a29df46296e56aa3491e589cdf",
              "versionType": "git"
            },
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              "version": "6.1.63",
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        },
        {
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          "versions": [
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            }
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        }
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  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nvsock/virtio: fix potential unbounded skb queue\n\nvirtio_transport_inc_rx_pkt() checks vvs-\u003erx_bytes + len \u003e vvs-\u003ebuf_alloc.\n\nvirtio_transport_recv_enqueue() skips coalescing for packets\nwith VIRTIO_VSOCK_SEQ_EOM.\n\nIf fed with packets with len == 0 and VIRTIO_VSOCK_SEQ_EOM,\na very large number of packets can be queued\nbecause vvs-\u003erx_bytes stays at 0.\n\nFix this by estimating the skb metadata size:\n\n\t(Number of skbs in the queue) * SKB_TRUESIZE(0)"
    }
  ],
  "id": "CVE-2026-53132",
  "lastModified": "2026-07-06T15:23:07.123",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "LOCAL",
          "availabilityImpact": "HIGH",
          "baseScore": 7.1,
          "baseSeverity": "HIGH",
          "confidentialityImpact": "NONE",
          "integrityImpact": "NONE",
          "privilegesRequired": "NONE",
          "scope": "CHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H",
          "version": "3.1"
        },
        "exploitabilityScore": 2.5,
        "impactScore": 4.0,
        "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "type": "Secondary"
      }
    ]
  },
  "published": "2026-06-25T09:16:30.437",
  "references": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "tags": [
        "Patch"
      ],
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  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "vulnStatus": "Analyzed",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-401"
        }
      ],
      "source": "nvd@nist.gov",
      "type": "Primary"
    }
  ]
}

CVE-2026-53132 (GCVE-0-2026-53132)

Vulnerability from cvelistv5 – Published: 2026-06-25 08:38 – Updated: 2026-08-05 12:33

Title

vsock/virtio: fix potential unbounded skb queue

Summary

Severity

7.1 (High)


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

Assigner

Linux mitre root

References

4 references

URL	Tags
https://git.kernel.org/stable/c/1eca304f97a34ed5e…
https://git.kernel.org/stable/c/9bdc637fde66b63d6…
https://git.kernel.org/stable/c/100d5b2ffdc6468b9…
https://git.kernel.org/stable/c/059b7dbd20a6f0c53…

Impacted products

2 products

Vendor	Product	Version
Linux	Linux	Affected: 077706165717686a2a6a71405fef036cd5b37ae0 , < 1eca304f97a34ed5e921e1f0e06c8b241f25bf12 (git) Affected: 077706165717686a2a6a71405fef036cd5b37ae0 , < 9bdc637fde66b63d6cad0caacd034888bb7bf5f5 (git) Affected: 077706165717686a2a6a71405fef036cd5b37ae0 , < 100d5b2ffdc6468b9e48532641f29e83efdcb63c (git) Affected: 077706165717686a2a6a71405fef036cd5b37ae0 , < 059b7dbd20a6f0c539a45ddff1573cb8946685b5 (git) Affected: 5852a2b573f7a3a29df46296e56aa3491e589cdf (git) Affected: 6.1.63 , < 6.2 (semver)
Linux	Linux	Affected: 6.3 Unaffected: 0 , < 6.3 (semver) Unaffected: 6.12.94 , ≤ 6.12.* (semver) Unaffected: 6.18.36 , ≤ 6.18.* (semver) Unaffected: 7.0.13 , ≤ 7.0.* (semver) Unaffected: 7.1 , ≤ * (original_commit_for_fix)

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "net/vmw_vsock/virtio_transport_common.c"
          ],
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          "vendor": "Linux",
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            {
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              "versionType": "git"
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          ]
        },
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          "programFiles": [
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              "versionType": "original_commit_for_fix"
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          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nvsock/virtio: fix potential unbounded skb queue\n\nvirtio_transport_inc_rx_pkt() checks vvs-\u003erx_bytes + len \u003e vvs-\u003ebuf_alloc.\n\nvirtio_transport_recv_enqueue() skips coalescing for packets\nwith VIRTIO_VSOCK_SEQ_EOM.\n\nIf fed with packets with len == 0 and VIRTIO_VSOCK_SEQ_EOM,\na very large number of packets can be queued\nbecause vvs-\u003erx_bytes stays at 0.\n\nFix this by estimating the skb metadata size:\n\n\t(Number of skbs in the queue) * SKB_TRUESIZE(0)"
        }
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            "version": "3.1"
          },
          "scenarios": [
            {
              "lang": "en",
              "value": "AV:L - The vulnerable code is in virtio/vhost-vsock receive handling, reached through a local virtual socket channel rather than ordinary IP networking. The highest reasonable scenario is a malicious KVM guest or local vsock peer supplying crafted virtio-vsock packets to a host vsock endpoint.\nAC:L - Once the attacker can supply virtio-vsock headers, repeatedly sending len=0 OP_RW packets with VIRTIO_VSOCK_SEQ_EOM deterministically bypasses payload accounting. No race, timing window, or rare memory layout condition is required.\nPR:N - The vhost-vsock receive path performs address/type/state validation but no host credential, capability, or authentication check before enqueueing the packet. A malicious guest/peer needs no privileges on the vulnerable host kernel to deliver crafted virtio-vsock packets.\nUI:N - No victim user action is required after a reachable vsock endpoint exists. The attacker can flood the receive queue directly.\nS:C - In the vhost-vsock deployment, guest-controlled packets consume host kernel memory, crossing the guest/host security boundary. This is a KVM guest-to-host denial-of-service scenario.\nC:N - The bug is unbounded skb queue growth from missing metadata accounting, not an out-of-bounds read, UAF, or data disclosure path. I found no confidentiality primitive.\nI:N - The flaw queues attacker-supplied zero-length skb metadata but does not corrupt memory or provide an arbitrary write/control-flow primitive. I found no integrity impact beyond denial of service.\nA:H - The receive queue can grow without the intended buffer-accounting limit, causing unbounded host kernel memory consumption. A sustained flood can drive OOM or host-wide service loss."
            }
          ]
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      ],
      "providerMetadata": {
        "dateUpdated": "2026-08-05T12:33:26.330Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
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        },
        {
          "url": "https://git.kernel.org/stable/c/059b7dbd20a6f0c539a45ddff1573cb8946685b5"
        }
      ],
      "title": "vsock/virtio: fix potential unbounded skb queue",
      "x_generator": {
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      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2026-53132",
    "datePublished": "2026-06-25T08:38:21.575Z",
    "dateReserved": "2026-06-09T07:44:35.386Z",
    "dateUpdated": "2026-08-05T12:33:26.330Z",
    "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.

Detection rules are retrieved from Rulezet.

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.
Browse all ATT&CK techniques and the vulnerabilities related to each.

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.