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FKIE_CVE-2026-74263

Vulnerability from fkie_nvd - Published: 2026-08-15 06:22 - Updated: 2026-08-17 06:19
Severity
Summary
In the Linux kernel, the following vulnerability has been resolved: net: wwan: t7xx: check skb_clone in control TX t7xx_port_ctrl_tx() clones each skb fragment before passing it to the port transmit path. The clone is used immediately to set cloned->len, so an skb_clone() failure results in a NULL pointer dereference. Check the clone before using it. If previous fragments were already queued, preserve the driver's existing partial-write behavior by returning the number of bytes submitted so far.
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/05f789fa90d95d5771230e78453cedff2486039d
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/112490467586146d323cb7230b1d72137e36900c
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/4c1b25d85f4c9a0f85f3f8c39988ad266a3f3095
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/7edd4db82f9429591de10be4c904c817f12ba029
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/f7aebaee2961bfcb86f282202d3dbd9b69db1a7c
Impacted products
Vendor Product Version
To clipboard 

{
  "affected": [
    {
      "affectedData": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/net/wwan/t7xx/t7xx_port_wwan.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "7edd4db82f9429591de10be4c904c817f12ba029",
              "status": "affected",
              "version": "36bd28c1cb0dbf48645cfe43159907fb3253b33a",
              "versionType": "git"
            },
            {
              "lessThan": "112490467586146d323cb7230b1d72137e36900c",
              "status": "affected",
              "version": "36bd28c1cb0dbf48645cfe43159907fb3253b33a",
              "versionType": "git"
            },
            {
              "lessThan": "f7aebaee2961bfcb86f282202d3dbd9b69db1a7c",
              "status": "affected",
              "version": "36bd28c1cb0dbf48645cfe43159907fb3253b33a",
              "versionType": "git"
            },
            {
              "lessThan": "4c1b25d85f4c9a0f85f3f8c39988ad266a3f3095",
              "status": "affected",
              "version": "36bd28c1cb0dbf48645cfe43159907fb3253b33a",
              "versionType": "git"
            },
            {
              "lessThan": "05f789fa90d95d5771230e78453cedff2486039d",
              "status": "affected",
              "version": "36bd28c1cb0dbf48645cfe43159907fb3253b33a",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "drivers/net/wwan/t7xx/t7xx_port_wwan.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "6.4"
            },
            {
              "lessThan": "6.4",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.6.*",
              "status": "unaffected",
              "version": "6.6.145",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
              "version": "6.12.97",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.40",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.1.*",
              "status": "unaffected",
              "version": "7.1.5",
              "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\nnet: wwan: t7xx: check skb_clone in control TX\n\nt7xx_port_ctrl_tx() clones each skb fragment before passing it to the\nport transmit path. The clone is used immediately to set cloned-\u003elen, so\nan skb_clone() failure results in a NULL pointer dereference.\n\nCheck the clone before using it. If previous fragments were already\nqueued, preserve the driver\u0027s existing partial-write behavior by\nreturning the number of bytes submitted so far."
    }
  ],
  "id": "CVE-2026-74263",
  "lastModified": "2026-08-17T06:19:19.870",
  "metrics": {},
  "published": "2026-08-15T06:22:25.570",
  "references": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/05f789fa90d95d5771230e78453cedff2486039d"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/112490467586146d323cb7230b1d72137e36900c"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/4c1b25d85f4c9a0f85f3f8c39988ad266a3f3095"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/7edd4db82f9429591de10be4c904c817f12ba029"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/f7aebaee2961bfcb86f282202d3dbd9b69db1a7c"
    }
  ],
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "vulnStatus": "Received"
}



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