FKIE_CVE-2026-68411

Vulnerability from fkie_nvd - Published: 2026-08-10 13:20 - Updated: 2026-08-19 17:20
Severity
Summary
In the Linux kernel, the following vulnerability has been resolved: wifi: mac80211_hwsim: clamp virtio RX length before skb_put hwsim_virtio_rx_work() passes the virtqueue used-ring length reported by the device straight to skb_put() on a fixed-size receive skb. A backend reporting a length larger than the skb tailroom drives skb_put() past the buffer end and hits skb_over_panic() -- a host-triggerable guest panic (denial of service). Clamp the length to the skb's available room before skb_put(). A conforming device never reports more than the posted buffer size, so valid frames are unaffected; a truncated over-report then fails the length/header checks in hwsim_virtio_handle_cmd() and is dropped, so truncating rather than dropping here cannot be turned into a parsing problem.
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/10a2b430f8f06ae14b9590b6f6faa6b588ef0654
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/5779e4a33e1666ddfeba43e96e29c4a9e5254ff0
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/6dc76371a9a360c29de00df5b11563102d9d675a
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/7f9d678b870fca8eaf1d46fa915cba0b1d5b387a
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/82c5a30a66e2a7337d99476c67d6fc1a99c4250e
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/909573d6a9b67354fc0515952574564e7c909c62
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/99dc05c75acc3c8cde8d89c5371f4b569de5ac62
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/fade308845c89f784da8a6780c1e77258488f1b6
Impacted products
Vendor Product Version
To clipboard 

{
  "affected": [
    {
      "affectedData": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/net/wireless/virtual/mac80211_hwsim_main.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "7f9d678b870fca8eaf1d46fa915cba0b1d5b387a",
              "status": "affected",
              "version": "5d44fe7c9808c56e136e59147bd932f5491520f1",
              "versionType": "git"
            },
            {
              "lessThan": "909573d6a9b67354fc0515952574564e7c909c62",
              "status": "affected",
              "version": "5d44fe7c9808c56e136e59147bd932f5491520f1",
              "versionType": "git"
            },
            {
              "lessThan": "5779e4a33e1666ddfeba43e96e29c4a9e5254ff0",
              "status": "affected",
              "version": "5d44fe7c9808c56e136e59147bd932f5491520f1",
              "versionType": "git"
            },
            {
              "lessThan": "82c5a30a66e2a7337d99476c67d6fc1a99c4250e",
              "status": "affected",
              "version": "5d44fe7c9808c56e136e59147bd932f5491520f1",
              "versionType": "git"
            },
            {
              "lessThan": "fade308845c89f784da8a6780c1e77258488f1b6",
              "status": "affected",
              "version": "5d44fe7c9808c56e136e59147bd932f5491520f1",
              "versionType": "git"
            },
            {
              "lessThan": "6dc76371a9a360c29de00df5b11563102d9d675a",
              "status": "affected",
              "version": "5d44fe7c9808c56e136e59147bd932f5491520f1",
              "versionType": "git"
            },
            {
              "lessThan": "99dc05c75acc3c8cde8d89c5371f4b569de5ac62",
              "status": "affected",
              "version": "5d44fe7c9808c56e136e59147bd932f5491520f1",
              "versionType": "git"
            },
            {
              "lessThan": "10a2b430f8f06ae14b9590b6f6faa6b588ef0654",
              "status": "affected",
              "version": "5d44fe7c9808c56e136e59147bd932f5491520f1",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "drivers/net/wireless/virtual/mac80211_hwsim_main.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "5.7"
            },
            {
              "lessThan": "5.7",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.10.*",
              "status": "unaffected",
              "version": "5.10.265",
              "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": "6.6.148",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
              "version": "6.12.101",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.42",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.1.*",
              "status": "unaffected",
              "version": "7.1.6",
              "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\nwifi: mac80211_hwsim: clamp virtio RX length before skb_put\n\nhwsim_virtio_rx_work() passes the virtqueue used-ring length reported by\nthe device straight to skb_put() on a fixed-size receive skb. A backend\nreporting a length larger than the skb tailroom drives skb_put() past the\nbuffer end and hits skb_over_panic() -- a host-triggerable guest panic\n(denial of service).\n\nClamp the length to the skb\u0027s available room before skb_put(). A\nconforming device never reports more than the posted buffer size, so valid\nframes are unaffected; a truncated over-report then fails the\nlength/header checks in hwsim_virtio_handle_cmd() and is dropped, so\ntruncating rather than dropping here cannot be turned into a parsing\nproblem."
    }
  ],
  "id": "CVE-2026-68411",
  "lastModified": "2026-08-19T17:20:48.810",
  "metrics": {},
  "published": "2026-08-10T13:20:34.787",
  "references": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/10a2b430f8f06ae14b9590b6f6faa6b588ef0654"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/5779e4a33e1666ddfeba43e96e29c4a9e5254ff0"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/6dc76371a9a360c29de00df5b11563102d9d675a"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/7f9d678b870fca8eaf1d46fa915cba0b1d5b387a"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/82c5a30a66e2a7337d99476c67d6fc1a99c4250e"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/909573d6a9b67354fc0515952574564e7c909c62"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/99dc05c75acc3c8cde8d89c5371f4b569de5ac62"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/fade308845c89f784da8a6780c1e77258488f1b6"
    }
  ],
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "vulnStatus": "Received"
}



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