Description (CNA)
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().
Affected (CNA)
| Vendor / product | Versions |
|---|---|
| Linux / Linux | affected 4ab8c18d4d67321cc7b660559de17511d4fc0237 before 89ff289cbf5d3b659a2babc5ccaae4eaf7e7cf53; affected 4ab8c18d4d67321cc7b660559de17511d4fc0237 before d638ec188e95fe60f4b01106ffd41958f8fb3c2c; affected 4ab8c18d4d67321cc7b660559de17511d4fc0237 before f8163c414de8640f2ca82ce4dc93409d4cdc2fad; affected 4ab8c18d4d67321cc7b660559de17511d4fc0237 before 012406f89abc52d1d5f07aa5653b519ebf6d2407; affected 4ab8c18d4d67321cc7b660559de17511d4fc0237 before c6d2af3b217a525741c472f0ab45d7d274b8468f; affected 4ab8c18d4d67321cc7b660559de17511d4fc0237 before 3e1b1ac47e8163627f159f30d80d51b914620dd4; affected 4ab8c18d4d67321cc7b660559de17511d4fc0237 before 313ca06e7e224ca1dfadd5722fe71fb8bc276b8b; affected 4ab8c18d4d67321cc7b660559de17511d4fc0237 before 7b681dd5fbf60b24a13c14661e5b7735759fb491 |
| Linux / Linux | affected 4.19; unaffected 0 before 4.19; unaffected 5.10.261 through 5.10.*; unaffected 5.15.212 through 5.15.*; unaffected 6.1.178 through 6.1.*; unaffected 6.6.145 through 6.6.*; unaffected 6.12.96 through 6.12.*; unaffected 6.18.39 through 6.18.*; unaffected 7.1.4 through 7.1.*; unaffected 7.2 through * |
CWE
No CWE identifiers supplied.
References
- https://git.kernel.org/stable/c/89ff289cbf5d3b659a2babc5ccaae4eaf7e7cf53
- https://git.kernel.org/stable/c/d638ec188e95fe60f4b01106ffd41958f8fb3c2c
- https://git.kernel.org/stable/c/f8163c414de8640f2ca82ce4dc93409d4cdc2fad
- https://git.kernel.org/stable/c/012406f89abc52d1d5f07aa5653b519ebf6d2407
- https://git.kernel.org/stable/c/c6d2af3b217a525741c472f0ab45d7d274b8468f
- https://git.kernel.org/stable/c/3e1b1ac47e8163627f159f30d80d51b914620dd4
- https://git.kernel.org/stable/c/313ca06e7e224ca1dfadd5722fe71fb8bc276b8b
- https://git.kernel.org/stable/c/7b681dd5fbf60b24a13c14661e5b7735759fb491