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CVE-2026-46207 (GCVE-0-2026-46207)

Vulnerability from cvelistv5 – Published: 2026-05-28 09:40 – Updated: 2026-06-14 18:02
VLAI
Title
vsock/virtio: fix empty payload in tap skb for non-linear buffers
Summary
In the Linux kernel, the following vulnerability has been resolved: vsock/virtio: fix empty payload in tap skb for non-linear buffers For non-linear skbs, virtio_transport_build_skb() goes through virtio_transport_copy_nonlinear_skb() to copy the original payload in the new skb to be delivered to the vsockmon tap device. This manually initializes an iov_iter but does not set iov_iter.count. Since the iov_iter is zero-initialized, the copy length is zero and no payload is actually copied to the monitor interface, leaving data un-initialized. Fix this by removing the linear vs non-linear split and using skb_copy_datagram_iter() with iov_iter_kvec() for all cases, as vhost-vsock already does. This handles both linear and non-linear skbs, properly initializes the iov_iter, and removes the now unused virtio_transport_copy_nonlinear_skb(). While touching this code, let's also check the return value of skb_copy_datagram_iter(), even though it's unlikely to fail.
Severity
5.5 (Medium)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Assigner
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: 4b0bf10eb077cb43c09746251ef3608d62c45667 , < 06747f52ab157591cec7e5623a759473b66ef6f6 (git)
Affected: 4b0bf10eb077cb43c09746251ef3608d62c45667 , < 52da6a74ca3de0fcda60301096b71534b3b18641 (git)
Affected: 4b0bf10eb077cb43c09746251ef3608d62c45667 , < 378b131a25bd1a5ee27ca199fe486c299d5350c5 (git)
Affected: 4b0bf10eb077cb43c09746251ef3608d62c45667 , < 3a3e3d90cbc79600544536723911657730759af3 (git)
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Linux Linux Affected: 6.7
Unaffected: 0 , < 6.7 (semver)
Unaffected: 6.12.90 , ≤ 6.12.* (semver)
Unaffected: 6.18.32 , ≤ 6.18.* (semver)
Unaffected: 7.0.9 , ≤ 7.0.* (semver)
Unaffected: 7.1 , ≤ * (original_commit_for_fix)
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{
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      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "net/vmw_vsock/virtio_transport_common.c"
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    "dateReserved": "2026-05-13T15:03:33.105Z",
    "dateUpdated": "2026-06-14T18:02:44.626Z",
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    "redhat_vex": {
      "aggregate_severity": "Moderate",
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      "cve": "CVE-2026-46207",
      "id": "CVE-2026-46207",
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      "aggregate_severity": "low",
      "current_release_date": "2026-09-11T01:11:07Z",
      "cve": "CVE-2026-46207",
      "id": "CVE-2026-46207",
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      "source": "SUSE CSAF VEX",
      "status": "interim",
      "title": "SUSE CVE CVE-2026-46207",
      "url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2026-46207.json",
      "version": "14"
    }
  }
}



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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

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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.