PT-2026-64551 · Linux · Linux

CVE-2026-64330

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Publicado

2026-07-25

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Atualizado

2026-07-25

Nenhuma

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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().
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Identificadores relacionados

CVE-2026-64330

Produtos afetados

Linux