FKIE_CVE-2026-64330

Vulnerability from fkie_nvd - Published: 2026-07-25 10:17 - Updated: 2026-07-25 10:17
Severity
Summary
In the Linux kernel, the following vulnerability has been resolved: usb: typec: tcpm: Validate SVID index in svdm_consume_modes() In svdm_consume_modes(), the SVID value is read from pmdata->svids using pmdata->svid_index as an array index without bounds validation: paltmode->svid = pmdata->svids[pmdata->svid_index]; If pmdata->svid_index is driven beyond SVID_DISCOVERY_MAX (16), it results in an out-of-bounds read of the pmdata->svids array. Because pd_mode_data is embedded inside struct tcpm_port, indexing past svids reads into adjacent fields. In particular: - At index 16, it reads the altmodes count. - At index 18 and beyond, it reads into altmode_desc[], which contains partner-supplied SVDM Discovery Modes VDOs. By injecting a chosen SVID into altmode_desc[0].vdo and driving svid_index to 20, the partner can force paltmode->svid to be loaded with an arbitrary, partner- chosen SVID, which is then registered via typec_partner_register_altmode(). Fix this by validating that pmdata->svid_index is non-negative and strictly less than pmdata->nsvids before accessing the pmdata->svids array inside svdm_consume_modes().
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/012406f89abc52d1d5f07aa5653b519ebf6d2407
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/313ca06e7e224ca1dfadd5722fe71fb8bc276b8b
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/3e1b1ac47e8163627f159f30d80d51b914620dd4
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/7b681dd5fbf60b24a13c14661e5b7735759fb491
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/89ff289cbf5d3b659a2babc5ccaae4eaf7e7cf53
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/c6d2af3b217a525741c472f0ab45d7d274b8468f
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/d638ec188e95fe60f4b01106ffd41958f8fb3c2c
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/f8163c414de8640f2ca82ce4dc93409d4cdc2fad
Impacted products
Vendor Product Version
To clipboard 

{
  "affected": [
    {
      "affectedData": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/usb/typec/tcpm/tcpm.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "89ff289cbf5d3b659a2babc5ccaae4eaf7e7cf53",
              "status": "affected",
              "version": "4ab8c18d4d67321cc7b660559de17511d4fc0237",
              "versionType": "git"
            },
            {
              "lessThan": "d638ec188e95fe60f4b01106ffd41958f8fb3c2c",
              "status": "affected",
              "version": "4ab8c18d4d67321cc7b660559de17511d4fc0237",
              "versionType": "git"
            },
            {
              "lessThan": "f8163c414de8640f2ca82ce4dc93409d4cdc2fad",
              "status": "affected",
              "version": "4ab8c18d4d67321cc7b660559de17511d4fc0237",
              "versionType": "git"
            },
            {
              "lessThan": "012406f89abc52d1d5f07aa5653b519ebf6d2407",
              "status": "affected",
              "version": "4ab8c18d4d67321cc7b660559de17511d4fc0237",
              "versionType": "git"
            },
            {
              "lessThan": "c6d2af3b217a525741c472f0ab45d7d274b8468f",
              "status": "affected",
              "version": "4ab8c18d4d67321cc7b660559de17511d4fc0237",
              "versionType": "git"
            },
            {
              "lessThan": "3e1b1ac47e8163627f159f30d80d51b914620dd4",
              "status": "affected",
              "version": "4ab8c18d4d67321cc7b660559de17511d4fc0237",
              "versionType": "git"
            },
            {
              "lessThan": "313ca06e7e224ca1dfadd5722fe71fb8bc276b8b",
              "status": "affected",
              "version": "4ab8c18d4d67321cc7b660559de17511d4fc0237",
              "versionType": "git"
            },
            {
              "lessThan": "7b681dd5fbf60b24a13c14661e5b7735759fb491",
              "status": "affected",
              "version": "4ab8c18d4d67321cc7b660559de17511d4fc0237",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "drivers/usb/typec/tcpm/tcpm.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "4.19"
            },
            {
              "lessThan": "4.19",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.10.*",
              "status": "unaffected",
              "version": "5.10.261",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.15.*",
              "status": "unaffected",
              "version": "5.15.212",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.1.*",
              "status": "unaffected",
              "version": "6.1.178",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.6.*",
              "status": "unaffected",
              "version": "6.6.145",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
              "version": "6.12.96",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.39",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.1.*",
              "status": "unaffected",
              "version": "7.1.4",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "7.2-rc3",
              "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\nusb: typec: tcpm: Validate SVID index in svdm_consume_modes()\n\nIn svdm_consume_modes(), the SVID value is read from pmdata-\u003esvids using\npmdata-\u003esvid_index as an array index without bounds validation:\n\n    paltmode-\u003esvid = pmdata-\u003esvids[pmdata-\u003esvid_index];\n\nIf pmdata-\u003esvid_index is driven beyond SVID_DISCOVERY_MAX (16), it results\nin an out-of-bounds read of the pmdata-\u003esvids array. Because pd_mode_data\nis embedded inside struct tcpm_port, indexing past svids reads into\nadjacent fields. In particular:\n- At index 16, it reads the altmodes count.\n- At index 18 and beyond, it reads into altmode_desc[], which contains\n  partner-supplied SVDM Discovery Modes VDOs.\n\nBy injecting a chosen SVID into altmode_desc[0].vdo and driving svid_index\nto 20, the partner can force paltmode-\u003esvid to be loaded with an arbitrary,\npartner- chosen SVID, which is then registered via\ntypec_partner_register_altmode().\n\nFix this by validating that pmdata-\u003esvid_index is non-negative and strictly\nless than pmdata-\u003ensvids before accessing the pmdata-\u003esvids array inside\nsvdm_consume_modes()."
    }
  ],
  "id": "CVE-2026-64330",
  "lastModified": "2026-07-25T10:17:14.673",
  "metrics": {},
  "published": "2026-07-25T10:17:14.673",
  "references": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/012406f89abc52d1d5f07aa5653b519ebf6d2407"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/313ca06e7e224ca1dfadd5722fe71fb8bc276b8b"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/3e1b1ac47e8163627f159f30d80d51b914620dd4"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/7b681dd5fbf60b24a13c14661e5b7735759fb491"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/89ff289cbf5d3b659a2babc5ccaae4eaf7e7cf53"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/c6d2af3b217a525741c472f0ab45d7d274b8468f"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/d638ec188e95fe60f4b01106ffd41958f8fb3c2c"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/f8163c414de8640f2ca82ce4dc93409d4cdc2fad"
    }
  ],
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "vulnStatus": "Received"
}



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