CVE-2026-64330usb: typec: tcpm: Validate SVID index in svdm_consume_modes()
- 7.8HighCVSS base score
- 0.13%Exploitation in 30 daysEPSS · top 97% of all CVEs
- NoKnown exploitednot in CISA's KEV catalog
- NonePublic exploitsnone known yet
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().
Timeline
ID reserved
By Linux
- 6 days later
· 6 days later
Published
- 3 months later
· 3 months later
Record updated
Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| NVDNVD · Analyzed | 3.1 | High7.8 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H |
- EPSS (exploitation in 30 days)
- 0.13% · top 97% of all CVEs (13 Nov 2026)
- CISA SSVC
- Exploitation: none · Automatable: no · Technical impact: partial
The list uses the assigner's score when there is one, then CISA's, then NVD's: High 7.8.
Affected products
- affected 4ab8c18d4d67321cc7b660559de17511d4fc0237 – < 89ff289cbf5d3b659a2babc5ccaae4eaf7e7cf53
- affected 4ab8c18d4d67321cc7b660559de17511d4fc0237 – < d638ec188e95fe60f4b01106ffd41958f8fb3c2c
- affected 4ab8c18d4d67321cc7b660559de17511d4fc0237 – < f8163c414de8640f2ca82ce4dc93409d4cdc2fad
- affected 4ab8c18d4d67321cc7b660559de17511d4fc0237 – < 012406f89abc52d1d5f07aa5653b519ebf6d2407
- affected 4ab8c18d4d67321cc7b660559de17511d4fc0237 – < c6d2af3b217a525741c472f0ab45d7d274b8468f
- affected 4ab8c18d4d67321cc7b660559de17511d4fc0237 – < 3e1b1ac47e8163627f159f30d80d51b914620dd4
- affected 4ab8c18d4d67321cc7b660559de17511d4fc0237 – < 313ca06e7e224ca1dfadd5722fe71fb8bc276b8b
- affected 4ab8c18d4d67321cc7b660559de17511d4fc0237 – < 7b681dd5fbf60b24a13c14661e5b7735759fb491
- affected 4.19
- unaffected < 4.19
- unaffected 5.10.261 – ≤ 5.10.*
- unaffected 5.15.212 – ≤ 5.15.*
- unaffected 6.1.178 – ≤ 6.1.*
- unaffected 6.6.145 – ≤ 6.6.*
- unaffected 6.12.96 – ≤ 6.12.*
- unaffected 6.18.39 – ≤ 6.18.*
- unaffected 7.1.4 – ≤ 7.1.*
- unaffected 7.2 – ≤ *
References
References8
- https://git.kernel.org/stable/c/89ff289cbf5d3b659a2babc5ccaae4eaf7e7cf53 (opens in a new tab)
- https://git.kernel.org/stable/c/d638ec188e95fe60f4b01106ffd41958f8fb3c2c (opens in a new tab)
- https://git.kernel.org/stable/c/f8163c414de8640f2ca82ce4dc93409d4cdc2fad (opens in a new tab)
- https://git.kernel.org/stable/c/012406f89abc52d1d5f07aa5653b519ebf6d2407 (opens in a new tab)
- https://git.kernel.org/stable/c/c6d2af3b217a525741c472f0ab45d7d274b8468f (opens in a new tab)
- https://git.kernel.org/stable/c/3e1b1ac47e8163627f159f30d80d51b914620dd4 (opens in a new tab)
- https://git.kernel.org/stable/c/313ca06e7e224ca1dfadd5722fe71fb8bc276b8b (opens in a new tab)
- https://git.kernel.org/stable/c/7b681dd5fbf60b24a13c14661e5b7735759fb491 (opens in a new tab)
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- EUVD EUVD-2026-48874 (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://cveledger.app/cve/CVE-2026-64330)Record last updated .