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().

Metrics

No CVSS v4.0

Attack Vector Local

Attack Complexity Low

Privileges Required Low

Scope Unchanged

Confidentiality Impact None

Integrity Impact None

Availability Impact High

User Interaction None

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

Key SSVC decision points have not yet been added.

Affected Vendors & Products

Vendors Products
Linux
  • Linux Kernel

No data.

No data.

References
Link Providers
https://git.kernel.org/stable/c/012406f89abc52d1d5f07aa5653b519ebf6d2407 cve-icon
https://git.kernel.org/stable/c/313ca06e7e224ca1dfadd5722fe71fb8bc276b8b cve-icon
https://git.kernel.org/stable/c/3e1b1ac47e8163627f159f30d80d51b914620dd4 cve-icon
https://git.kernel.org/stable/c/7b681dd5fbf60b24a13c14661e5b7735759fb491 cve-icon
https://git.kernel.org/stable/c/89ff289cbf5d3b659a2babc5ccaae4eaf7e7cf53 cve-icon
https://git.kernel.org/stable/c/c6d2af3b217a525741c472f0ab45d7d274b8468f cve-icon
https://git.kernel.org/stable/c/d638ec188e95fe60f4b01106ffd41958f8fb3c2c cve-icon
https://git.kernel.org/stable/c/f8163c414de8640f2ca82ce4dc93409d4cdc2fad cve-icon
https://lore.kernel.org/linux-cve-announce/2026072513-CVE-2026-64330-372d@gregkh/T cve-icon
https://nvd.nist.gov/vuln/detail/CVE-2026-64330 cve-icon
https://www.cve.org/CVERecord?id=CVE-2026-64330 cve-icon
History

Sun, 02 Aug 2026 13:45:00 +0000

Type Values Removed Values Added
Weaknesses CWE-20
CWE-788

Thu, 30 Jul 2026 00:15:00 +0000

Type Values Removed Values Added
Weaknesses CWE-125
References
Metrics threat_severity

None

 cvssV3_1

{'score': 5.5, 'vector': 'CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H'}

threat_severity

Moderate

Mon, 27 Jul 2026 06:15:00 +0000

Type Values Removed Values Added
Weaknesses CWE-20
CWE-788

Sat, 25 Jul 2026 09:30:00 +0000

Type Values Removed Values Added
Description 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().
Title usb: typec: tcpm: Validate SVID index in svdm_consume_modes()
First Time appeared Linux
Linux linux Kernel
CPEs cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
Vendors & Products Linux
Linux linux Kernel
References
cve-icon MITRE

Status: PUBLISHED

Assigner: Linux

Published: 2026-07-25T08:49:57.734Z

Updated: 2026-07-25T08:49:57.734Z

Reserved: 2026-07-19T15:36:31.781Z

Link: CVE-2026-64330

cve-icon Vulnrichment

No data.

cve-icon NVD

No data.

cve-icon Redhat

Severity : Moderate

Publid Date: 2026-07-25T00:00:00Z

Links: CVE-2026-64330 - Bugzilla