Vulnerability-Lookup

CVE-2026-80906 (GCVE-0-2026-80906)

Vulnerability from cvelistv5 – Published: 2026-09-04 17:19 – Updated: 2026-09-04 17:19

Title

net: packet: fix wrong transport_header when sending VLAN-tagged frame

Summary

In the Linux kernel, the following vulnerability has been resolved: net: packet: fix wrong transport_header when sending VLAN-tagged frame In packet_parse_headers(), when processing a VLAN-tagged frame, skb_set_network_header() is called to advance network_header past the VLAN tag to the inner protocol header. skb_probe_transport_header() is then called with skb->protocol still set to the outer VLAN EtherType (e.g. ETH_P_8021Q), while nhoff (derived from skb_network_offset()) already points past the VLAN tag to the inner protocol header. In __skb_flow_dissect(), proto is initialized to ETH_P_8021Q and nhoff points past the VLAN tag. When the dissector hits case ETH_P_8021Q, it reads a struct vlan_hdr at nhoff via __skb_header_pointer(), but that offset contains the inner protocol header (e.g. an IP header). The bytes are misinterpreted as a VLAN header, yielding a garbage encapsulated EtherType that matches no known protocol. The dissector returns false, so skb_probe_transport_header() never calls skb_set_transport_header(), leaving transport_header at its uninitialized sentinel value (~0U). Move skb_probe_transport_header() to before skb_set_network_header(). At the time skb_probe_transport_header() is called, network_header still points to the VLAN header, so nhoff correctly points to the VLAN header. The flow dissector can then parse the VLAN header, extract the inner EtherType, and advance nhoff to the inner protocol header, allowing transport_header to be set correctly.

Severity

No CVSS data available.

Assigner

Linux mitre root

References

8 references

URL	Tags
https://git.kernel.org/stable/c/a4b82de96d465ddb4…
https://git.kernel.org/stable/c/fa86bc52ea8ba981f…
https://git.kernel.org/stable/c/5479eb9b355f44745…
https://git.kernel.org/stable/c/e451e20adb869a983…
https://git.kernel.org/stable/c/6971cf319263d6a1b…
https://git.kernel.org/stable/c/f9297abbcaba760b7…
https://git.kernel.org/stable/c/6386a6ffa2efba296…
https://git.kernel.org/stable/c/01fdecc0480d916c7…

Impacted products

2 products

Vendor	Product	Version	CPE status
Linux	Linux	Affected: c2137d565ceb505de69593c181a0543bc4083838 , < a4b82de96d465ddb44bc931145c0fa80c4fe9c9c (git) Affected: 9ff46c36df2e0a1ac352f2f4038eaf3f0f7361b8 , < fa86bc52ea8ba981f74f851fd61e2a3d3bc0feac (git) Affected: dfed913e8b55a0c2c4906f1242fd38fd9a116e49 , < 5479eb9b355f44745d7ccfe112386bd4f96eceea (git) Affected: dfed913e8b55a0c2c4906f1242fd38fd9a116e49 , < e451e20adb869a983a21dda158625f024142e61f (git) Affected: dfed913e8b55a0c2c4906f1242fd38fd9a116e49 , < 6971cf319263d6a1b4096f9248aca9e57d77a1eb (git) Affected: dfed913e8b55a0c2c4906f1242fd38fd9a116e49 , < f9297abbcaba760b7a7b9d63b839f607f738013e (git) Affected: dfed913e8b55a0c2c4906f1242fd38fd9a116e49 , < 6386a6ffa2efba2965ed8e4fa303582c0b76a215 (git) Affected: dfed913e8b55a0c2c4906f1242fd38fd9a116e49 , < 01fdecc0480d916c799dbee584833a4a37e94d06 (git) Affected: ad3f90a9c4a2c74bb3711f2031bffda4ec44c849 (git) Affected: 5.10.163 , < 5.10.266 (semver) Affected: 5.15.87 , < 5.15.217 (semver) Affected: 5.4.229 , < 5.5 (semver)	guessed
Linux	Linux	Affected: 5.19 Unaffected: 0 , < 5.19 (semver) Unaffected: 5.10.266 , ≤ 5.10.* (semver) Unaffected: 5.15.217 , ≤ 5.15.* (semver) Unaffected: 6.1.184 , ≤ 6.1.* (semver) Unaffected: 6.6.153 , ≤ 6.6.* (semver) Unaffected: 6.12.105 , ≤ 6.12.* (semver) Unaffected: 6.18.46 , ≤ 6.18.* (semver) Unaffected: 7.1.10 , ≤ 7.1.* (semver) Unaffected: 7.2 , ≤ * (original_commit_for_fix)	guessed

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "net/packet/af_packet.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "a4b82de96d465ddb44bc931145c0fa80c4fe9c9c",
              "status": "affected",
              "version": "c2137d565ceb505de69593c181a0543bc4083838",
              "versionType": "git"
            },
            {
              "lessThan": "fa86bc52ea8ba981f74f851fd61e2a3d3bc0feac",
              "status": "affected",
              "version": "9ff46c36df2e0a1ac352f2f4038eaf3f0f7361b8",
              "versionType": "git"
            },
            {
              "lessThan": "5479eb9b355f44745d7ccfe112386bd4f96eceea",
              "status": "affected",
              "version": "dfed913e8b55a0c2c4906f1242fd38fd9a116e49",
              "versionType": "git"
            },
            {
              "lessThan": "e451e20adb869a983a21dda158625f024142e61f",
              "status": "affected",
              "version": "dfed913e8b55a0c2c4906f1242fd38fd9a116e49",
              "versionType": "git"
            },
            {
              "lessThan": "6971cf319263d6a1b4096f9248aca9e57d77a1eb",
              "status": "affected",
              "version": "dfed913e8b55a0c2c4906f1242fd38fd9a116e49",
              "versionType": "git"
            },
            {
              "lessThan": "f9297abbcaba760b7a7b9d63b839f607f738013e",
              "status": "affected",
              "version": "dfed913e8b55a0c2c4906f1242fd38fd9a116e49",
              "versionType": "git"
            },
            {
              "lessThan": "6386a6ffa2efba2965ed8e4fa303582c0b76a215",
              "status": "affected",
              "version": "dfed913e8b55a0c2c4906f1242fd38fd9a116e49",
              "versionType": "git"
            },
            {
              "lessThan": "01fdecc0480d916c799dbee584833a4a37e94d06",
              "status": "affected",
              "version": "dfed913e8b55a0c2c4906f1242fd38fd9a116e49",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "ad3f90a9c4a2c74bb3711f2031bffda4ec44c849",
              "versionType": "git"
            },
            {
              "lessThan": "5.10.266",
              "status": "affected",
              "version": "5.10.163",
              "versionType": "semver"
            },
            {
              "lessThan": "5.15.217",
              "status": "affected",
              "version": "5.15.87",
              "versionType": "semver"
            },
            {
              "lessThan": "5.5",
              "status": "affected",
              "version": "5.4.229",
              "versionType": "semver"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "net/packet/af_packet.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": "5.10.*",
              "status": "unaffected",
              "version": "5.10.266",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.15.*",
              "status": "unaffected",
              "version": "5.15.217",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.1.*",
              "status": "unaffected",
              "version": "6.1.184",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.6.*",
              "status": "unaffected",
              "version": "6.6.153",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
              "version": "6.12.105",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.46",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.1.*",
              "status": "unaffected",
              "version": "7.1.10",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "7.2",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.10.266",
                  "versionStartIncluding": "5.10.163",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.15.217",
                  "versionStartIncluding": "5.15.87",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.1.184",
                  "versionStartIncluding": "5.19",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.6.153",
                  "versionStartIncluding": "5.19",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.12.105",
                  "versionStartIncluding": "5.19",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.18.46",
                  "versionStartIncluding": "5.19",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.1.10",
                  "versionStartIncluding": "5.19",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.2",
                  "versionStartIncluding": "5.19",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionStartIncluding": "5.4.229",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet: packet: fix wrong transport_header when sending VLAN-tagged frame\n\nIn packet_parse_headers(), when processing a VLAN-tagged frame,\nskb_set_network_header() is called to advance network_header past the\nVLAN tag to the inner protocol header. skb_probe_transport_header() is\nthen called with skb-\u003eprotocol still set to the outer VLAN EtherType\n(e.g. ETH_P_8021Q), while nhoff (derived from skb_network_offset())\nalready points past the VLAN tag to the inner protocol header.\n\nIn __skb_flow_dissect(), proto is initialized to ETH_P_8021Q and nhoff\npoints past the VLAN tag. When the dissector hits case ETH_P_8021Q, it\nreads a struct vlan_hdr at nhoff via __skb_header_pointer(), but that\noffset contains the inner protocol header (e.g. an IP header). The bytes\nare misinterpreted as a VLAN header, yielding a garbage encapsulated\nEtherType that matches no known protocol. The dissector returns false,\nso skb_probe_transport_header() never calls skb_set_transport_header(),\nleaving transport_header at its uninitialized sentinel value (~0U).\n\nMove skb_probe_transport_header() to before skb_set_network_header(). At\nthe time skb_probe_transport_header() is called, network_header still\npoints to the VLAN header, so nhoff correctly points to the VLAN header.\nThe flow dissector can then parse the VLAN header, extract the inner\nEtherType, and advance nhoff to the inner protocol header, allowing\ntransport_header to be set correctly."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-09-04T17:19:16.531Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/a4b82de96d465ddb44bc931145c0fa80c4fe9c9c"
        },
        {
          "url": "https://git.kernel.org/stable/c/fa86bc52ea8ba981f74f851fd61e2a3d3bc0feac"
        },
        {
          "url": "https://git.kernel.org/stable/c/5479eb9b355f44745d7ccfe112386bd4f96eceea"
        },
        {
          "url": "https://git.kernel.org/stable/c/e451e20adb869a983a21dda158625f024142e61f"
        },
        {
          "url": "https://git.kernel.org/stable/c/6971cf319263d6a1b4096f9248aca9e57d77a1eb"
        },
        {
          "url": "https://git.kernel.org/stable/c/f9297abbcaba760b7a7b9d63b839f607f738013e"
        },
        {
          "url": "https://git.kernel.org/stable/c/6386a6ffa2efba2965ed8e4fa303582c0b76a215"
        },
        {
          "url": "https://git.kernel.org/stable/c/01fdecc0480d916c799dbee584833a4a37e94d06"
        }
      ],
      "title": "net: packet: fix wrong transport_header when sending VLAN-tagged frame",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2026-80906",
    "datePublished": "2026-09-04T17:19:16.531Z",
    "dateReserved": "2026-08-26T14:34:25.800Z",
    "dateUpdated": "2026-09-04T17:19:16.531Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
    "nvd": "{\"cve\":{\"id\":\"CVE-2026-80906\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2026-09-04T18:18:00.240\",\"lastModified\":\"2026-09-04T18:18:00.240\",\"vulnStatus\":\"Received\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"In the Linux kernel, the following vulnerability has been resolved:\\n\\nnet: packet: fix wrong transport_header when sending VLAN-tagged frame\\n\\nIn packet_parse_headers(), when processing a VLAN-tagged frame,\\nskb_set_network_header() is called to advance network_header past the\\nVLAN tag to the inner protocol header. skb_probe_transport_header() is\\nthen called with skb-\u003eprotocol still set to the outer VLAN EtherType\\n(e.g. ETH_P_8021Q), while nhoff (derived from skb_network_offset())\\nalready points past the VLAN tag to the inner protocol header.\\n\\nIn __skb_flow_dissect(), proto is initialized to ETH_P_8021Q and nhoff\\npoints past the VLAN tag. When the dissector hits case ETH_P_8021Q, it\\nreads a struct vlan_hdr at nhoff via __skb_header_pointer(), but that\\noffset contains the inner protocol header (e.g. an IP header). The bytes\\nare misinterpreted as a VLAN header, yielding a garbage encapsulated\\nEtherType that matches no known protocol. The dissector returns false,\\nso skb_probe_transport_header() never calls skb_set_transport_header(),\\nleaving transport_header at its uninitialized sentinel value (~0U).\\n\\nMove skb_probe_transport_header() to before skb_set_network_header(). At\\nthe time skb_probe_transport_header() is called, network_header still\\npoints to the VLAN header, so nhoff correctly points to the VLAN header.\\nThe flow dissector can then parse the VLAN header, extract the inner\\nEtherType, and advance nhoff to the inner protocol header, allowing\\ntransport_header to be set correctly.\"}],\"affected\":[{\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"affectedData\":[{\"vendor\":\"Linux\",\"product\":\"Linux\",\"defaultStatus\":\"unaffected\",\"programFiles\":[\"net/packet/af_packet.c\"],\"repo\":\"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\"versions\":[{\"version\":\"c2137d565ceb505de69593c181a0543bc4083838\",\"lessThan\":\"a4b82de96d465ddb44bc931145c0fa80c4fe9c9c\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"9ff46c36df2e0a1ac352f2f4038eaf3f0f7361b8\",\"lessThan\":\"fa86bc52ea8ba981f74f851fd61e2a3d3bc0feac\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"dfed913e8b55a0c2c4906f1242fd38fd9a116e49\",\"lessThan\":\"5479eb9b355f44745d7ccfe112386bd4f96eceea\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"dfed913e8b55a0c2c4906f1242fd38fd9a116e49\",\"lessThan\":\"e451e20adb869a983a21dda158625f024142e61f\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"dfed913e8b55a0c2c4906f1242fd38fd9a116e49\",\"lessThan\":\"6971cf319263d6a1b4096f9248aca9e57d77a1eb\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"dfed913e8b55a0c2c4906f1242fd38fd9a116e49\",\"lessThan\":\"f9297abbcaba760b7a7b9d63b839f607f738013e\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"dfed913e8b55a0c2c4906f1242fd38fd9a116e49\",\"lessThan\":\"6386a6ffa2efba2965ed8e4fa303582c0b76a215\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"dfed913e8b55a0c2c4906f1242fd38fd9a116e49\",\"lessThan\":\"01fdecc0480d916c799dbee584833a4a37e94d06\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"ad3f90a9c4a2c74bb3711f2031bffda4ec44c849\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"5.10.163\",\"lessThan\":\"5.10.266\",\"versionType\":\"semver\",\"status\":\"affected\"},{\"version\":\"5.15.87\",\"lessThan\":\"5.15.217\",\"versionType\":\"semver\",\"status\":\"affected\"},{\"version\":\"5.4.229\",\"lessThan\":\"5.5\",\"versionType\":\"semver\",\"status\":\"affected\"}]},{\"vendor\":\"Linux\",\"product\":\"Linux\",\"defaultStatus\":\"affected\",\"programFiles\":[\"net/packet/af_packet.c\"],\"repo\":\"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\"versions\":[{\"version\":\"5.19\",\"status\":\"affected\"},{\"version\":\"0\",\"lessThan\":\"5.19\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"5.10.266\",\"lessThanOrEqual\":\"5.10.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"5.15.217\",\"lessThanOrEqual\":\"5.15.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.1.184\",\"lessThanOrEqual\":\"6.1.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.6.153\",\"lessThanOrEqual\":\"6.6.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.12.105\",\"lessThanOrEqual\":\"6.12.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.18.46\",\"lessThanOrEqual\":\"6.18.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"7.1.10\",\"lessThanOrEqual\":\"7.1.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"7.2\",\"lessThanOrEqual\":\"*\",\"versionType\":\"original_commit_for_fix\",\"status\":\"unaffected\"}]}]}],\"metrics\":{},\"references\":[{\"url\":\"https://git.kernel.org/stable/c/01fdecc0480d916c799dbee584833a4a37e94d06\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/5479eb9b355f44745d7ccfe112386bd4f96eceea\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/6386a6ffa2efba2965ed8e4fa303582c0b76a215\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/6971cf319263d6a1b4096f9248aca9e57d77a1eb\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/a4b82de96d465ddb44bc931145c0fa80c4fe9c9c\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/e451e20adb869a983a21dda158625f024142e61f\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/f9297abbcaba760b7a7b9d63b839f607f738013e\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/fa86bc52ea8ba981f74f851fd61e2a3d3bc0feac\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"}]}}"
  }
}

FKIE_CVE-2026-80906

Vulnerability from fkie_nvd - Published: 2026-09-04 18:18 - Updated: 2026-09-04 18:18

Severity

Summary

References

	URL	Tags
	416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/01fdecc0480d916c799dbee584833a4a37e94d06
	416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/5479eb9b355f44745d7ccfe112386bd4f96eceea
	416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/6386a6ffa2efba2965ed8e4fa303582c0b76a215
	416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/6971cf319263d6a1b4096f9248aca9e57d77a1eb
	416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/a4b82de96d465ddb44bc931145c0fa80c4fe9c9c
	416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/e451e20adb869a983a21dda158625f024142e61f
	416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/f9297abbcaba760b7a7b9d63b839f607f738013e
	416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/fa86bc52ea8ba981f74f851fd61e2a3d3bc0feac

Impacted products

	Vendor	Product	Version

JSON

To clipboard

{
  "affected": [
    {
      "affectedData": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "net/packet/af_packet.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "a4b82de96d465ddb44bc931145c0fa80c4fe9c9c",
              "status": "affected",
              "version": "c2137d565ceb505de69593c181a0543bc4083838",
              "versionType": "git"
            },
            {
              "lessThan": "fa86bc52ea8ba981f74f851fd61e2a3d3bc0feac",
              "status": "affected",
              "version": "9ff46c36df2e0a1ac352f2f4038eaf3f0f7361b8",
              "versionType": "git"
            },
            {
              "lessThan": "5479eb9b355f44745d7ccfe112386bd4f96eceea",
              "status": "affected",
              "version": "dfed913e8b55a0c2c4906f1242fd38fd9a116e49",
              "versionType": "git"
            },
            {
              "lessThan": "e451e20adb869a983a21dda158625f024142e61f",
              "status": "affected",
              "version": "dfed913e8b55a0c2c4906f1242fd38fd9a116e49",
              "versionType": "git"
            },
            {
              "lessThan": "6971cf319263d6a1b4096f9248aca9e57d77a1eb",
              "status": "affected",
              "version": "dfed913e8b55a0c2c4906f1242fd38fd9a116e49",
              "versionType": "git"
            },
            {
              "lessThan": "f9297abbcaba760b7a7b9d63b839f607f738013e",
              "status": "affected",
              "version": "dfed913e8b55a0c2c4906f1242fd38fd9a116e49",
              "versionType": "git"
            },
            {
              "lessThan": "6386a6ffa2efba2965ed8e4fa303582c0b76a215",
              "status": "affected",
              "version": "dfed913e8b55a0c2c4906f1242fd38fd9a116e49",
              "versionType": "git"
            },
            {
              "lessThan": "01fdecc0480d916c799dbee584833a4a37e94d06",
              "status": "affected",
              "version": "dfed913e8b55a0c2c4906f1242fd38fd9a116e49",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "ad3f90a9c4a2c74bb3711f2031bffda4ec44c849",
              "versionType": "git"
            },
            {
              "lessThan": "5.10.266",
              "status": "affected",
              "version": "5.10.163",
              "versionType": "semver"
            },
            {
              "lessThan": "5.15.217",
              "status": "affected",
              "version": "5.15.87",
              "versionType": "semver"
            },
            {
              "lessThan": "5.5",
              "status": "affected",
              "version": "5.4.229",
              "versionType": "semver"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "net/packet/af_packet.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": "5.10.*",
              "status": "unaffected",
              "version": "5.10.266",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.15.*",
              "status": "unaffected",
              "version": "5.15.217",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.1.*",
              "status": "unaffected",
              "version": "6.1.184",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.6.*",
              "status": "unaffected",
              "version": "6.6.153",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
              "version": "6.12.105",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.46",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.1.*",
              "status": "unaffected",
              "version": "7.1.10",
              "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: packet: fix wrong transport_header when sending VLAN-tagged frame\n\nIn packet_parse_headers(), when processing a VLAN-tagged frame,\nskb_set_network_header() is called to advance network_header past the\nVLAN tag to the inner protocol header. skb_probe_transport_header() is\nthen called with skb-\u003eprotocol still set to the outer VLAN EtherType\n(e.g. ETH_P_8021Q), while nhoff (derived from skb_network_offset())\nalready points past the VLAN tag to the inner protocol header.\n\nIn __skb_flow_dissect(), proto is initialized to ETH_P_8021Q and nhoff\npoints past the VLAN tag. When the dissector hits case ETH_P_8021Q, it\nreads a struct vlan_hdr at nhoff via __skb_header_pointer(), but that\noffset contains the inner protocol header (e.g. an IP header). The bytes\nare misinterpreted as a VLAN header, yielding a garbage encapsulated\nEtherType that matches no known protocol. The dissector returns false,\nso skb_probe_transport_header() never calls skb_set_transport_header(),\nleaving transport_header at its uninitialized sentinel value (~0U).\n\nMove skb_probe_transport_header() to before skb_set_network_header(). At\nthe time skb_probe_transport_header() is called, network_header still\npoints to the VLAN header, so nhoff correctly points to the VLAN header.\nThe flow dissector can then parse the VLAN header, extract the inner\nEtherType, and advance nhoff to the inner protocol header, allowing\ntransport_header to be set correctly."
    }
  ],
  "id": "CVE-2026-80906",
  "lastModified": "2026-09-04T18:18:00.240",
  "metrics": {},
  "published": "2026-09-04T18:18:00.240",
  "references": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/01fdecc0480d916c799dbee584833a4a37e94d06"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/5479eb9b355f44745d7ccfe112386bd4f96eceea"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/6386a6ffa2efba2965ed8e4fa303582c0b76a215"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/6971cf319263d6a1b4096f9248aca9e57d77a1eb"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/a4b82de96d465ddb44bc931145c0fa80c4fe9c9c"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/e451e20adb869a983a21dda158625f024142e61f"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/f9297abbcaba760b7a7b9d63b839f607f738013e"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/fa86bc52ea8ba981f74f851fd61e2a3d3bc0feac"
    }
  ],
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "vulnStatus": "Received"
}

GHSA-WGJR-C9MX-3F4X

Vulnerability from github – Published: 2026-09-04 18:31 – Updated: 2026-09-04 18:31

Details

In the Linux kernel, the following vulnerability has been resolved:

net: packet: fix wrong transport_header when sending VLAN-tagged frame

In packet_parse_headers(), when processing a VLAN-tagged frame, skb_set_network_header() is called to advance network_header past the VLAN tag to the inner protocol header. skb_probe_transport_header() is then called with skb->protocol still set to the outer VLAN EtherType (e.g. ETH_P_8021Q), while nhoff (derived from skb_network_offset()) already points past the VLAN tag to the inner protocol header.

In __skb_flow_dissect(), proto is initialized to ETH_P_8021Q and nhoff points past the VLAN tag. When the dissector hits case ETH_P_8021Q, it reads a struct vlan_hdr at nhoff via __skb_header_pointer(), but that offset contains the inner protocol header (e.g. an IP header). The bytes are misinterpreted as a VLAN header, yielding a garbage encapsulated EtherType that matches no known protocol. The dissector returns false, so skb_probe_transport_header() never calls skb_set_transport_header(), leaving transport_header at its uninitialized sentinel value (~0U).

Move skb_probe_transport_header() to before skb_set_network_header(). At the time skb_probe_transport_header() is called, network_header still points to the VLAN header, so nhoff correctly points to the VLAN header. The flow dissector can then parse the VLAN header, extract the inner EtherType, and advance nhoff to the inner protocol header, allowing transport_header to be set correctly.

Show details on source website

JSON

To clipboard

{
  "affected": [],
  "aliases": [
    "CVE-2026-80906"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-09-04T18:18:00Z",
    "severity": null
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet: packet: fix wrong transport_header when sending VLAN-tagged frame\n\nIn packet_parse_headers(), when processing a VLAN-tagged frame,\nskb_set_network_header() is called to advance network_header past the\nVLAN tag to the inner protocol header. skb_probe_transport_header() is\nthen called with skb-\u003eprotocol still set to the outer VLAN EtherType\n(e.g. ETH_P_8021Q), while nhoff (derived from skb_network_offset())\nalready points past the VLAN tag to the inner protocol header.\n\nIn __skb_flow_dissect(), proto is initialized to ETH_P_8021Q and nhoff\npoints past the VLAN tag. When the dissector hits case ETH_P_8021Q, it\nreads a struct vlan_hdr at nhoff via __skb_header_pointer(), but that\noffset contains the inner protocol header (e.g. an IP header). The bytes\nare misinterpreted as a VLAN header, yielding a garbage encapsulated\nEtherType that matches no known protocol. The dissector returns false,\nso skb_probe_transport_header() never calls skb_set_transport_header(),\nleaving transport_header at its uninitialized sentinel value (~0U).\n\nMove skb_probe_transport_header() to before skb_set_network_header(). At\nthe time skb_probe_transport_header() is called, network_header still\npoints to the VLAN header, so nhoff correctly points to the VLAN header.\nThe flow dissector can then parse the VLAN header, extract the inner\nEtherType, and advance nhoff to the inner protocol header, allowing\ntransport_header to be set correctly.",
  "id": "GHSA-wgjr-c9mx-3f4x",
  "modified": "2026-09-04T18:31:34Z",
  "published": "2026-09-04T18:31:34Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-80906"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/01fdecc0480d916c799dbee584833a4a37e94d06"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/5479eb9b355f44745d7ccfe112386bd4f96eceea"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/6386a6ffa2efba2965ed8e4fa303582c0b76a215"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/6971cf319263d6a1b4096f9248aca9e57d77a1eb"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/a4b82de96d465ddb44bc931145c0fa80c4fe9c9c"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/e451e20adb869a983a21dda158625f024142e61f"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/f9297abbcaba760b7a7b9d63b839f607f738013e"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/fa86bc52ea8ba981f74f851fd61e2a3d3bc0feac"
    }
  ],
  "schema_version": "1.4.0",
  "severity": []
}

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

CVE-2026-80906 (GCVE-0-2026-80906)

FKIE_CVE-2026-80906

GHSA-WGJR-C9MX-3F4X

Tags

Sightings

Nomenclature