Vulnerability-Lookup

GHSA-J99C-MG6X-5MMP

Vulnerability from github – Published: 2026-08-15 06:32 – Updated: 2026-08-15 06:32

Details

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.

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{
  "affected": [],
  "aliases": [
    "CVE-2026-74263"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-08-15T06:22:25Z",
    "severity": null
  },
  "details": "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": "GHSA-j99c-mg6x-5mmp",
  "modified": "2026-08-15T06:32:27Z",
  "published": "2026-08-15T06:32:27Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-74263"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/05f789fa90d95d5771230e78453cedff2486039d"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/112490467586146d323cb7230b1d72137e36900c"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/4c1b25d85f4c9a0f85f3f8c39988ad266a3f3095"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/7edd4db82f9429591de10be4c904c817f12ba029"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/f7aebaee2961bfcb86f282202d3dbd9b69db1a7c"
    }
  ],
  "schema_version": "1.4.0",
  "severity": []
}

CVE-2026-74263 (GCVE-0-2026-74263)

Vulnerability from cvelistv5 – Published: 2026-08-15 05:57 – Updated: 2026-08-17 05:16

Title

net: wwan: t7xx: check skb_clone in control TX

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.

Severity

No CVSS data available.

Assigner

Linux mitre root

References

5 references

URL	Tags
https://git.kernel.org/stable/c/7edd4db82f9429591…
https://git.kernel.org/stable/c/112490467586146d3…
https://git.kernel.org/stable/c/f7aebaee2961bfcb8…
https://git.kernel.org/stable/c/4c1b25d85f4c9a0f8…
https://git.kernel.org/stable/c/05f789fa90d95d577…

Impacted products

2 products

Vendor	Product	Version
Linux	Linux	Affected: 36bd28c1cb0dbf48645cfe43159907fb3253b33a , < 7edd4db82f9429591de10be4c904c817f12ba029 (git) Affected: 36bd28c1cb0dbf48645cfe43159907fb3253b33a , < 112490467586146d323cb7230b1d72137e36900c (git) Affected: 36bd28c1cb0dbf48645cfe43159907fb3253b33a , < f7aebaee2961bfcb86f282202d3dbd9b69db1a7c (git) Affected: 36bd28c1cb0dbf48645cfe43159907fb3253b33a , < 4c1b25d85f4c9a0f85f3f8c39988ad266a3f3095 (git) Affected: 36bd28c1cb0dbf48645cfe43159907fb3253b33a , < 05f789fa90d95d5771230e78453cedff2486039d (git)
Linux	Linux	Affected: 6.4 Unaffected: 0 , < 6.4 (semver) Unaffected: 6.6.145 , ≤ 6.6.* (semver) Unaffected: 6.12.97 , ≤ 6.12.* (semver) Unaffected: 6.18.40 , ≤ 6.18.* (semver) Unaffected: 7.1.5 , ≤ 7.1.* (semver) Unaffected: 7.2 , ≤ * (original_commit_for_fix)

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{
  "containers": {
    "cna": {
      "affected": [
        {
          "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",
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              "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"
            },
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              "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"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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                  "versionStartIncluding": "6.4",
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                },
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          "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."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-08-17T05:16:05.593Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
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          "url": "https://git.kernel.org/stable/c/7edd4db82f9429591de10be4c904c817f12ba029"
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        },
        {
          "url": "https://git.kernel.org/stable/c/05f789fa90d95d5771230e78453cedff2486039d"
        }
      ],
      "title": "net: wwan: t7xx: check skb_clone in control TX",
      "x_generator": {
        "engine": "bippy-1.2.0"
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  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2026-74263",
    "datePublished": "2026-08-15T05:57:39.660Z",
    "dateReserved": "2026-08-15T05:44:03.877Z",
    "dateUpdated": "2026-08-17T05:16:05.593Z",
    "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.

Action not permitted

GHSA-J99C-MG6X-5MMP

CVE-2026-74263 (GCVE-0-2026-74263)

Tags

Sightings

Nomenclature