CVE-2026-98238 (GCVE-0-2026-98238)

Vulnerability from cvelistv5 – Published: 2026-10-06 08:45 – Updated: 2026-10-06 08:45
VLAI
Title
net: wwan: t7xx: validate the netif index in t7xx_ccmni_recv_skb()
Summary
In the Linux kernel, the following vulnerability has been resolved: net: wwan: t7xx: validate the netif index in t7xx_ccmni_recv_skb() The netif index carried in the DPMAIF PIT header is five bits wide, but ccmni_inst[] only has room for NIC_DEV_MAX (21) entries. t7xx_ccmni_recv_skb() indexes the array without a bounds check, so indexes 21 to 31 read past it. The out-of-bounds value lands in the callback table that follows the array, which is never NULL, so the existing !ccmni check does not catch it and the driver dereferences whatever sits there as a struct t7xx_ccmni. Drop the skb when the index is out of range. Verified in a QEMU guest with a fault injector setting the netif index to 25: the unpatched driver reads a value past ccmni_inst[], which lands in the callback table, and dereferences it far enough to queue the skb. With this check the packet is dropped. Well-formed traffic on index 0 is unaffected. Changes in v2: none.
Severity
No CVSS data available.
Assigner
Linux CNA under the mitre root
CNA scorecard D 54/100 over 6618 records in the last 180 days details
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: 05d19bf500f8281f574713479b04679fa226d0a3 , < 7c2fe308bda5a7e6222d7f0c3c311991372baab4 (git)
Affected: 05d19bf500f8281f574713479b04679fa226d0a3 , < fba45070e25abdae08bcaebfadeef050dc39e208 (git)
Affected: 05d19bf500f8281f574713479b04679fa226d0a3 , < e1b0609b1a40da03e385be290853a604eb4c3fb9 (git)
Affected: 05d19bf500f8281f574713479b04679fa226d0a3 , < 9dbf13de4edff6fbc1f7ad9c4040326b6ed599ad (git)
Affected: 05d19bf500f8281f574713479b04679fa226d0a3 , < d28aa2de9654e8024922775520a2665e00c04ad5 (git)
Affected: 05d19bf500f8281f574713479b04679fa226d0a3 , < c7ead9704249d57d4693a04697e3bbd285138fa9 (git)
guessed Create a notification for this product.
Linux Linux Affected: 5.19
Unaffected: 0 , < 5.19 (semver)
Unaffected: 6.1.189 , ≤ 6.1.* (semver)
Unaffected: 6.6.158 , ≤ 6.6.* (semver)
Unaffected: 6.12.112 , ≤ 6.12.* (semver)
Unaffected: 6.18.54 , ≤ 6.18.* (semver)
Unaffected: 7.2.8 , ≤ 7.2.* (semver)
Unaffected: 7.3-rc4 , ≤ * (original_commit_for_fix)
guessed Create a notification for this product.
Show details on NVD website
To clipboard 

{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/net/wwan/t7xx/t7xx_netdev.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "7c2fe308bda5a7e6222d7f0c3c311991372baab4",
              "status": "affected",
              "version": "05d19bf500f8281f574713479b04679fa226d0a3",
              "versionType": "git"
            },
            {
              "lessThan": "fba45070e25abdae08bcaebfadeef050dc39e208",
              "status": "affected",
              "version": "05d19bf500f8281f574713479b04679fa226d0a3",
              "versionType": "git"
            },
            {
              "lessThan": "e1b0609b1a40da03e385be290853a604eb4c3fb9",
              "status": "affected",
              "version": "05d19bf500f8281f574713479b04679fa226d0a3",
              "versionType": "git"
            },
            {
              "lessThan": "9dbf13de4edff6fbc1f7ad9c4040326b6ed599ad",
              "status": "affected",
              "version": "05d19bf500f8281f574713479b04679fa226d0a3",
              "versionType": "git"
            },
            {
              "lessThan": "d28aa2de9654e8024922775520a2665e00c04ad5",
              "status": "affected",
              "version": "05d19bf500f8281f574713479b04679fa226d0a3",
              "versionType": "git"
            },
            {
              "lessThan": "c7ead9704249d57d4693a04697e3bbd285138fa9",
              "status": "affected",
              "version": "05d19bf500f8281f574713479b04679fa226d0a3",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "drivers/net/wwan/t7xx/t7xx_netdev.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": "6.1.*",
              "status": "unaffected",
              "version": "6.1.189",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.6.*",
              "status": "unaffected",
              "version": "6.6.158",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
              "version": "6.12.112",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.54",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.2.*",
              "status": "unaffected",
              "version": "7.2.8",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "7.3-rc4",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.1.189",
                  "versionStartIncluding": "5.19",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.6.158",
                  "versionStartIncluding": "5.19",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.12.112",
                  "versionStartIncluding": "5.19",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.18.54",
                  "versionStartIncluding": "5.19",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.2.8",
                  "versionStartIncluding": "5.19",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.3-rc4",
                  "versionStartIncluding": "5.19",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet: wwan: t7xx: validate the netif index in t7xx_ccmni_recv_skb()\n\nThe netif index carried in the DPMAIF PIT header is five bits wide,\nbut ccmni_inst[] only has room for NIC_DEV_MAX (21) entries.\nt7xx_ccmni_recv_skb() indexes the array without a bounds check, so\nindexes 21 to 31 read past it.  The out-of-bounds value lands in the\ncallback table that follows the array, which is never NULL, so the\nexisting !ccmni check does not catch it and the driver dereferences\nwhatever sits there as a struct t7xx_ccmni.\n\nDrop the skb when the index is out of range.\n\n\nVerified in a QEMU guest with a fault injector setting the netif\nindex to 25: the unpatched driver reads a value past ccmni_inst[],\nwhich lands in the callback table, and dereferences it far enough to\nqueue the skb.  With this check the packet is dropped.  Well-formed\ntraffic on index 0 is unaffected.\n\nChanges in v2: none."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-10-06T08:45:09.953Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/7c2fe308bda5a7e6222d7f0c3c311991372baab4"
        },
        {
          "url": "https://git.kernel.org/stable/c/fba45070e25abdae08bcaebfadeef050dc39e208"
        },
        {
          "url": "https://git.kernel.org/stable/c/e1b0609b1a40da03e385be290853a604eb4c3fb9"
        },
        {
          "url": "https://git.kernel.org/stable/c/9dbf13de4edff6fbc1f7ad9c4040326b6ed599ad"
        },
        {
          "url": "https://git.kernel.org/stable/c/d28aa2de9654e8024922775520a2665e00c04ad5"
        },
        {
          "url": "https://git.kernel.org/stable/c/c7ead9704249d57d4693a04697e3bbd285138fa9"
        }
      ],
      "title": "net: wwan: t7xx: validate the netif index in t7xx_ccmni_recv_skb()",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2026-98238",
    "datePublished": "2026-10-06T08:45:09.953Z",
    "dateReserved": "2026-09-25T10:25:14.329Z",
    "dateUpdated": "2026-10-06T08:45:09.953Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
    "epss": {
      "cve": "CVE-2026-98238",
      "date": "2026-10-10",
      "epss": "0.0018",
      "percentile": "0.06985"
    },
    "nvd": {
      "cve": {
        "affected": [
          {
            "affectedData": [
              {
                "defaultStatus": "unaffected",
                "product": "Linux",
                "programFiles": [
                  "drivers/net/wwan/t7xx/t7xx_netdev.c"
                ],
                "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
                "vendor": "Linux",
                "versions": [
                  {
                    "lessThan": "7c2fe308bda5a7e6222d7f0c3c311991372baab4",
                    "status": "affected",
                    "version": "05d19bf500f8281f574713479b04679fa226d0a3",
                    "versionType": "git"
                  },
                  {
                    "lessThan": "fba45070e25abdae08bcaebfadeef050dc39e208",
                    "status": "affected",
                    "version": "05d19bf500f8281f574713479b04679fa226d0a3",
                    "versionType": "git"
                  },
                  {
                    "lessThan": "e1b0609b1a40da03e385be290853a604eb4c3fb9",
                    "status": "affected",
                    "version": "05d19bf500f8281f574713479b04679fa226d0a3",
                    "versionType": "git"
                  },
                  {
                    "lessThan": "9dbf13de4edff6fbc1f7ad9c4040326b6ed599ad",
                    "status": "affected",
                    "version": "05d19bf500f8281f574713479b04679fa226d0a3",
                    "versionType": "git"
                  },
                  {
                    "lessThan": "d28aa2de9654e8024922775520a2665e00c04ad5",
                    "status": "affected",
                    "version": "05d19bf500f8281f574713479b04679fa226d0a3",
                    "versionType": "git"
                  },
                  {
                    "lessThan": "c7ead9704249d57d4693a04697e3bbd285138fa9",
                    "status": "affected",
                    "version": "05d19bf500f8281f574713479b04679fa226d0a3",
                    "versionType": "git"
                  }
                ]
              },
              {
                "defaultStatus": "affected",
                "product": "Linux",
                "programFiles": [
                  "drivers/net/wwan/t7xx/t7xx_netdev.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": "6.1.*",
                    "status": "unaffected",
                    "version": "6.1.189",
                    "versionType": "semver"
                  },
                  {
                    "lessThanOrEqual": "6.6.*",
                    "status": "unaffected",
                    "version": "6.6.158",
                    "versionType": "semver"
                  },
                  {
                    "lessThanOrEqual": "6.12.*",
                    "status": "unaffected",
                    "version": "6.12.112",
                    "versionType": "semver"
                  },
                  {
                    "lessThanOrEqual": "6.18.*",
                    "status": "unaffected",
                    "version": "6.18.54",
                    "versionType": "semver"
                  },
                  {
                    "lessThanOrEqual": "7.2.*",
                    "status": "unaffected",
                    "version": "7.2.8",
                    "versionType": "semver"
                  },
                  {
                    "lessThanOrEqual": "*",
                    "status": "unaffected",
                    "version": "7.3-rc4",
                    "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: validate the netif index in t7xx_ccmni_recv_skb()\n\nThe netif index carried in the DPMAIF PIT header is five bits wide,\nbut ccmni_inst[] only has room for NIC_DEV_MAX (21) entries.\nt7xx_ccmni_recv_skb() indexes the array without a bounds check, so\nindexes 21 to 31 read past it.  The out-of-bounds value lands in the\ncallback table that follows the array, which is never NULL, so the\nexisting !ccmni check does not catch it and the driver dereferences\nwhatever sits there as a struct t7xx_ccmni.\n\nDrop the skb when the index is out of range.\n\n\nVerified in a QEMU guest with a fault injector setting the netif\nindex to 25: the unpatched driver reads a value past ccmni_inst[],\nwhich lands in the callback table, and dereferences it far enough to\nqueue the skb.  With this check the packet is dropped.  Well-formed\ntraffic on index 0 is unaffected.\n\nChanges in v2: none."
          }
        ],
        "id": "CVE-2026-98238",
        "lastModified": "2026-10-06T09:18:11.657",
        "metrics": {},
        "published": "2026-10-06T09:18:11.657",
        "references": [
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "url": "https://git.kernel.org/stable/c/7c2fe308bda5a7e6222d7f0c3c311991372baab4"
          },
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "url": "https://git.kernel.org/stable/c/9dbf13de4edff6fbc1f7ad9c4040326b6ed599ad"
          },
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "url": "https://git.kernel.org/stable/c/c7ead9704249d57d4693a04697e3bbd285138fa9"
          },
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "url": "https://git.kernel.org/stable/c/d28aa2de9654e8024922775520a2665e00c04ad5"
          },
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "url": "https://git.kernel.org/stable/c/e1b0609b1a40da03e385be290853a604eb4c3fb9"
          },
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "url": "https://git.kernel.org/stable/c/fba45070e25abdae08bcaebfadeef050dc39e208"
          }
        ],
        "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "vulnStatus": "Received"
      }
    },
    "redhat_vex": {
      "aggregate_severity": "Moderate",
      "current_release_date": "2026-10-09T13:08:16+00:00",
      "cve": "CVE-2026-98238",
      "id": "CVE-2026-98238",
      "initial_release_date": "2026-10-06T00:00:00+00:00",
      "product_status:known_affected": "184",
      "product_status:known_not_affected": "93",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "kernel: net: wwan: t7xx: validate the netif index in t7xx_ccmni_recv_skb()",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-98238.json",
      "version": "3"
    },
    "suse_vex": {
      "aggregate_severity": "moderate",
      "current_release_date": "2026-10-07T23:45:40Z",
      "cve": "CVE-2026-98238",
      "id": "CVE-2026-98238",
      "initial_release_date": "2026-10-07T23:45:40Z",
      "product_status:known_affected": "30",
      "product_status:known_not_affected": "317",
      "source": "SUSE CSAF VEX",
      "status": "interim",
      "title": "SUSE CVE CVE-2026-98238",
      "url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2026-98238.json",
      "version": "2"
    }
  }
}



Log in or create an account to share your comment.




Tags
Taxonomy of the tags.





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.



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.