CVE-2026-64330: Linux kernel · usb: typec: tcpm: Validate SVID index in svdm_consume_modes()
Affects Linux kernelSource CVE Database V5
Not known to be exploited · fixed in f8163c414de8640f2ca82ce4dc93409d4cdc2fad : update Linux kernel when convenient.
Data as of 6 Nov 2026, 17:04 UTC
Rated by Threat Radar · No CVSS score from NVD or the CNA
Thin evidence
One scorer or none- CISA SSVC
- Exploitation
- No evidence of active exploitation and no public proof of concept
- Automatable
- Attackers cannot reliably automate steps 1–4 of the kill chain
- Technical impact
- Limited control over the software or limited information exposure
CISA SSVC assessment, 2026-11-06.
- Patch
- Available – fixed in f8163c414de8640f2ca82ce4dc93409d4cdc2fad, d638ec188e95fe60f4b01106ffd41958f8fb3c2c, c6d2af3b217a525741c472f0ab45d7d274b8468f +5
Exploitation evidence
Disclosed: evidence found.
CVE published 25 Jul 2026
Detectable: no evidence on record.
No public nuclei template indexed
Weaponized: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by Mirage: no evidence on record.
No attack traffic recorded by OffSeq Mirage sensors
A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 6 Nov 2026.
What to do
Upgrade to a fixed release listed under Affected software.
Affected software
| Product | Affected | Fixed in |
|---|---|---|
| LinuxLinux | Affected
| Fixed in
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| LinuxLinux | Affected
| Fixed in
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| LinuxLinux | Affected
| Fixed in
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| LinuxLinux | Affected
| Fixed in
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| LinuxLinux | Affected
| Fixed in
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| LinuxLinux | Affected
| Fixed in
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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().
References
- git.kernel.org/stable/c/89ff289cbf5d3b659a2babc5ccaae4eaf7e7cf53 (opens in a new tab)
- git.kernel.org/stable/c/d638ec188e95fe60f4b01106ffd41958f8fb3c2c (opens in a new tab)
- git.kernel.org/stable/c/f8163c414de8640f2ca82ce4dc93409d4cdc2fad (opens in a new tab)
- git.kernel.org/stable/c/012406f89abc52d1d5f07aa5653b519ebf6d2407 (opens in a new tab)
- git.kernel.org/stable/c/c6d2af3b217a525741c472f0ab45d7d274b8468f (opens in a new tab)
- git.kernel.org/stable/c/3e1b1ac47e8163627f159f30d80d51b914620dd4 (opens in a new tab)
- git.kernel.org/stable/c/313ca06e7e224ca1dfadd5722fe71fb8bc276b8b (opens in a new tab)
- git.kernel.org/stable/c/7b681dd5fbf60b24a13c14661e5b7735759fb491 (opens in a new tab)