FKIE_CVE-2026-74614

Vulnerability from fkie_nvd - Published: 2026-08-22 16:16 - Updated: 2026-10-14 13:10
Severity
8.4 (High) - CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Summary
In the Linux kernel, the following vulnerability has been resolved: vsock/virtio: read virtqueues under worker locks Commit bd50c5dc182b ("vsock/virtio: add support for device suspend/resume") made the *_run flags transition from false to true when restore installs replacement virtqueues. The RX, TX and event workers read their virtqueue before locking and checking the corresponding flag, so a worker delayed across freeze and restore can observe the replacement queue's running state while retaining a pointer to the deleted queue. Read each virtqueue under its mutex after checking the run flag, keeping the pointer and state in the same queue generation.
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/1cecb4202afdbeddcf29d59baf596ac6ab753f7f
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/29dd10583bf9d2744cd84b862e4257c0a5699570
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/941329ce14c5f481223a10d1d4c8b57ea7f3048a
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/a1fb0c5b8a7c2753758aeced40971f99449dde0c
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/bd43a7ec668be428265b3209eb43647aedcf720a
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/eae099c764c7ebdb842eb1f638913e310bdd6513
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/ebac8f6b1ef0e9278afe204b8692a7479988dace
Impacted products
Vendor Product Version
To clipboard 

{
  "affected": [
    {
      "affectedData": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "net/vmw_vsock/virtio_transport.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "941329ce14c5f481223a10d1d4c8b57ea7f3048a",
              "status": "affected",
              "version": "762c251c7f5c4ee5bef71460c6e822ed293fd69f",
              "versionType": "git"
            },
            {
              "lessThan": "29dd10583bf9d2744cd84b862e4257c0a5699570",
              "status": "affected",
              "version": "bd50c5dc182b0a52599f87b429f9a5a9cbfc9b1c",
              "versionType": "git"
            },
            {
              "lessThan": "a1fb0c5b8a7c2753758aeced40971f99449dde0c",
              "status": "affected",
              "version": "bd50c5dc182b0a52599f87b429f9a5a9cbfc9b1c",
              "versionType": "git"
            },
            {
              "lessThan": "eae099c764c7ebdb842eb1f638913e310bdd6513",
              "status": "affected",
              "version": "bd50c5dc182b0a52599f87b429f9a5a9cbfc9b1c",
              "versionType": "git"
            },
            {
              "lessThan": "bd43a7ec668be428265b3209eb43647aedcf720a",
              "status": "affected",
              "version": "bd50c5dc182b0a52599f87b429f9a5a9cbfc9b1c",
              "versionType": "git"
            },
            {
              "lessThan": "1cecb4202afdbeddcf29d59baf596ac6ab753f7f",
              "status": "affected",
              "version": "bd50c5dc182b0a52599f87b429f9a5a9cbfc9b1c",
              "versionType": "git"
            },
            {
              "lessThan": "ebac8f6b1ef0e9278afe204b8692a7479988dace",
              "status": "affected",
              "version": "bd50c5dc182b0a52599f87b429f9a5a9cbfc9b1c",
              "versionType": "git"
            },
            {
              "lessThan": "5.15.216",
              "status": "affected",
              "version": "5.15.138",
              "versionType": "semver"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "net/vmw_vsock/virtio_transport.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "5.19"
            },
            {
              "lessThan": "5.19",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.15.*",
              "status": "unaffected",
              "version": "5.15.216",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.1.*",
              "status": "unaffected",
              "version": "6.1.183",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.6.*",
              "status": "unaffected",
              "version": "6.6.152",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
              "version": "6.12.104",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.45",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.1.*",
              "status": "unaffected",
              "version": "7.1.9",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "7.2",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nvsock/virtio: read virtqueues under worker locks\n\nCommit bd50c5dc182b (\"vsock/virtio: add support for device\nsuspend/resume\") made the *_run flags transition from false to true when\nrestore installs replacement virtqueues.  The RX, TX and event workers\nread their virtqueue before locking and checking the corresponding flag,\nso a worker delayed across freeze and restore can observe the replacement\nqueue\u0027s running state while retaining a pointer to the deleted queue.\n\nRead each virtqueue under its mutex after checking the run flag, keeping\nthe pointer and state in the same queue generation."
    },
    {
      "lang": "es",
      "value": "En el kernel de Linux, la siguiente vulnerabilidad ha sido resuelta:\n\nvsock/virtio: leer virtqueues bajo bloqueos de trabajador\n\nEl commit bd50c5dc182b (\u0027vsock/virtio: a\u00f1adir soporte para suspensi\u00f3n/reanudaci\u00f3n de dispositivo\u0027) hizo que las banderas *_run transicionaran de falso a verdadero cuando la restauraci\u00f3n instala virtqueues de reemplazo. Los trabajadores de RX, TX y eventos leen su virtqueue antes de bloquear y verificar la bandera correspondiente, por lo que un trabajador retrasado a trav\u00e9s de la congelaci\u00f3n y restauraci\u00f3n puede observar el estado de ejecuci\u00f3n de la cola de reemplazo mientras retiene un puntero a la cola eliminada.\n\nLeer cada virtqueue bajo su mutex despu\u00e9s de verificar la bandera de ejecuci\u00f3n, manteniendo el puntero y el estado en la misma generaci\u00f3n de cola."
    }
  ],
  "id": "CVE-2026-74614",
  "lastModified": "2026-10-14T13:10:00.187",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "LOCAL",
          "availabilityImpact": "HIGH",
          "baseScore": 8.4,
          "baseSeverity": "HIGH",
          "confidentialityImpact": "HIGH",
          "integrityImpact": "HIGH",
          "privilegesRequired": "NONE",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
          "version": "3.1"
        },
        "exploitabilityScore": 2.5,
        "impactScore": 5.9,
        "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "type": "Secondary"
      }
    ]
  },
  "published": "2026-08-22T16:16:34.023",
  "references": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/1cecb4202afdbeddcf29d59baf596ac6ab753f7f"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/29dd10583bf9d2744cd84b862e4257c0a5699570"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/941329ce14c5f481223a10d1d4c8b57ea7f3048a"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/a1fb0c5b8a7c2753758aeced40971f99449dde0c"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/bd43a7ec668be428265b3209eb43647aedcf720a"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/eae099c764c7ebdb842eb1f638913e310bdd6513"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/ebac8f6b1ef0e9278afe204b8692a7479988dace"
    }
  ],
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "vulnStatus": "Received"
}



Log in or create an account to share your comment.




Tags
Taxonomy of the tags.




Drag nodes to arrange them. Double-click a related vulnerability to open it, or a source to visit its link. The Physics button on the left tunes the layout and the simulation; the legend at the bottom left hides or shows nodes by kind and by sighting type.

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.
Vulnerability timeline

Sightings and recorded dates, grouped by day · UTC

JSON

Loading timeline…




    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.