« Volver al listado

CVE-2026-68120

Estado: RecibidaAlta (7.5)—

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

rtase: Workaround for TX hang caused by hardware packet parsing

The hardware performs packet parsing before packet transmission. Parsing incomplete IPv4, IPv6, TCP, or UDP headers may trigger a TX hang because the hardware parser expects additional protocol header data that is not present in the packet.

The hardware performs additional PTP parsing on UDP packets identified by destination ports 319/320 at the expected UDP destination port offset.

If such a packet has transport data smaller than RTASE_MIN_PAD_LEN, the hardware parser expects additional packet data and may trigger a TX hang.

Leer descripción completaMostrar menos

To avoid these hardware issues, the driver applies the following workarounds.

Drop malformed packets that may trigger this hardware issue before transmission.

For IPv4 non-initial fragments, the hardware does not check the fragment offset before parsing the expected transport header location. As a result, these packets are still subject to transport header parsing even though they do not contain a transport header. If the transport data is shorter than the minimum transport header required by the hardware parser, pad the transport data to the minimum transport header length required by the hardware parser. Packets that also match the hardware PTP parsing conditions continue to follow the corresponding workaround.

For IPv6 fragmented packets, neither of the above hardware issues occurs because the hardware only continues packet parsing when the IPv6 Base Header Next Header field directly indicates UDP. Packets carrying a Fragment Header do not continue through the subsequent packet parsing stages.

For packets identified for hardware PTP parsing, pad the transport data so it reaches RTASE_MIN_PAD_LEN before transmission.

CVSS

Probabilidad de explotación (EPSS)

EPSS (Exploit Prediction Scoring System, de FIRST) estima la probabilidad de que una vulnerabilidad sea explotada en 30 días. Complementa a CVSS (impacto) y a CISA KEV (explotación confirmada).

🎯 Técnicas ATT&CK

Cómo se explota esta vulnerabilidad y qué consigue el atacante, en el lenguaje de MITRE ATT&CK.

Vulnerability in Linux kernel network driver (rtase) allows remote attacker to craft malformed packets over network causing TX hang (DoS). AV:N/AC:L/PR:N confirms remote network exploitation without privileges.

Inferido por nuestro agente de análisis a partir de la descripción oficial, el vector CVSS y la CWE, y comprobado por un supervisor. Puede contener errores.

🛡️ Mitigaciones ATT&CK que cubren estas técnicas

Filter Network TrafficVulnerability ScanningPrivileged Account ManagementNetwork SegmentationLimit Access to Resource Over NetworkApplication Isolation and Sandboxing

Tecnologías afectadas (1)

⚠ Inferidas por IA a partir de la descripción — NVD aún no ha analizado esta CVE; no son CPE verificados.

Linux — Linux KernelAI

Referencias

JSON original (NVD)

Mostrar
{
  "id": "CVE-2026-68120",
  "cveTags": [],
  "metrics": {
    "cvssMetricV31": [
      {
        "type": "Secondary",
        "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "cvssData": {
          "scope": "UNCHANGED",
          "version": "3.1",
          "baseScore": 7.5,
          "attackVector": "NETWORK",
          "baseSeverity": "HIGH",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
          "integrityImpact": "NONE",
          "userInteraction": "NONE",
          "attackComplexity": "LOW",
          "availabilityImpact": "HIGH",
          "privilegesRequired": "NONE",
          "confidentialityImpact": "NONE"
        },
        "impactScore": 3.6,
        "exploitabilityScore": 3.9
      }
    ]
  },
  "affected": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "affectedData": [
        {
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "product": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "d6e882b89fdf80be0ab4f914ec10f75215e49495",
              "lessThan": "fe3a7320711eec6537e4890892f7ab9776d8618f",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "d6e882b89fdf80be0ab4f914ec10f75215e49495",
              "lessThan": "4a4f3aa6af205bee539b5670afa2cd4e4953750e",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "d6e882b89fdf80be0ab4f914ec10f75215e49495",
              "lessThan": "0f54f5048615e4e2802697855ea6374613548301",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "d6e882b89fdf80be0ab4f914ec10f75215e49495",
              "lessThan": "1c50efa1faf3a1a96e100b07ec7a2f3164d90bee",
              "versionType": "git"
            }
          ],
          "programFiles": [
            "drivers/net/ethernet/realtek/rtase/rtase.h",
            "drivers/net/ethernet/realtek/rtase/rtase_main.c"
          ],
          "defaultStatus": "unaffected"
        },
        {
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "product": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "6.12"
            },
            {
              "status": "unaffected",
              "version": "0",
              "lessThan": "6.12",
              "versionType": "semver"
            },
            {
              "status": "unaffected",
              "version": "6.12.101",
              "versionType": "semver",
              "lessThanOrEqual": "6.12.*"
            },
            {
              "status": "unaffected",
              "version": "6.18.42",
              "versionType": "semver",
              "lessThanOrEqual": "6.18.*"
            },
            {
              "status": "unaffected",
              "version": "7.1.6",
              "versionType": "semver",
              "lessThanOrEqual": "7.1.*"
            },
            {
              "status": "unaffected",
              "version": "7.2",
              "versionType": "original_commit_for_fix",
              "lessThanOrEqual": "*"
            }
          ],
          "programFiles": [
            "drivers/net/ethernet/realtek/rtase/rtase.h",
            "drivers/net/ethernet/realtek/rtase/rtase_main.c"
          ],
          "defaultStatus": "affected"
        }
      ]
    }
  ],
  "published": "2026-08-10T13:19:57.073",
  "references": [
    {
      "url": "https://git.kernel.org/stable/c/0f54f5048615e4e2802697855ea6374613548301",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/1c50efa1faf3a1a96e100b07ec7a2f3164d90bee",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/4a4f3aa6af205bee539b5670afa2cd4e4953750e",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/fe3a7320711eec6537e4890892f7ab9776d8618f",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    }
  ],
  "vulnStatus": "Received",
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nrtase: Workaround for TX hang caused by hardware packet parsing\n\nThe hardware performs packet parsing before packet transmission.\nParsing incomplete IPv4, IPv6, TCP, or UDP headers may trigger a TX\nhang because the hardware parser expects additional protocol header\ndata that is not present in the packet.\n\nThe hardware performs additional PTP parsing on UDP packets identified\nby destination ports 319/320 at the expected UDP destination port\noffset.\n\nIf such a packet has transport data smaller than RTASE_MIN_PAD_LEN,\nthe hardware parser expects additional packet data and may trigger a\nTX hang.\n\nTo avoid these hardware issues, the driver applies the following\nworkarounds.\n\nDrop malformed packets that may trigger this hardware issue before\ntransmission.\n\nFor IPv4 non-initial fragments, the hardware does not check the\nfragment offset before parsing the expected transport header location.\nAs a result, these packets are still subject to transport header\nparsing even though they do not contain a transport header. If the\ntransport data is shorter than the minimum transport header required\nby the hardware parser, pad the transport data to the minimum\ntransport header length required by the hardware parser. Packets that\nalso match the hardware PTP parsing conditions continue to follow the\ncorresponding workaround.\n\nFor IPv6 fragmented packets, neither of the above hardware issues\noccurs because the hardware only continues packet parsing when the\nIPv6 Base Header Next Header field directly indicates UDP. Packets\ncarrying a Fragment Header do not continue through the subsequent\npacket parsing stages.\n\nFor packets identified for hardware PTP parsing, pad the transport\ndata so it reaches RTASE_MIN_PAD_LEN before transmission."
    }
  ],
  "lastModified": "2026-08-17T05:18:11.557",
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
}