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Back to active CVEs
Unknown severity · Source severity not reportedCVE-2026-63963

usb: typec: tcpm: validate VDO count in Discover Identity ACK handlersCVE-2026-63963

Answer in brief

CVE-2026-63963 records a Unknown severity vulnerability in usb: typec: tcpm: validate VDO count in Discover Identity ACK handlers. The current sources do not mark it as known exploited. The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.

Analysis pending evidence review

HOL Guard separates source facts from reviewed analysis. See the methodology.

Published Jul 19, 2026Updated Oct 21, 2026Source checked Oct 21, 2026First seen by HOL Oct 21, 2026Material review Oct 21, 2026
Upstream Advisory

Key facts

Risk
Unknown severitySource severity not reported
Exploitation
Not marked as known exploited
Affected software
2 mapped packages or products
Fix availability
Available

Why this deserves its current priority

A CVSS score is not reported in the current record. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.

Analysis status

Analysis pending evidence review

Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.

Affected scope and exposure questions

The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.

Mapped affected packages and fixed versions
PackageAffected rangeFixed version
Linux/Linuxgeneric>=f0690a25a140b853b1842fa80faf828601bb47e8 <6bacd22e1eae77abf089bbdc016270200a8dc83b || >=f0690a25a140b853b1842fa80faf828601bb47e8 <569f7971542eb10025d8a0989b83f28a29d8ba20 || >=f0690a25a140b853b1842fa80faf828601bb47e8 <f9d787fbe83127105e42088cca40e5118db0d810 || >=f0690a25a140b853b1842fa80faf828601bb47e8 <ed8649f3822e211d025bcab5158af6f8a38c8705 || >=f0690a25a140b853b1842fa80faf828601bb47e8 <8fbc349e8383125dd2d8de1c1e926279d398ab176bacd22e1eae77abf089bbdc016270200a8dc83b, 569f7971542eb10025d8a0989b83f28a29d8ba20, f9d787fbe83127105e42088cca40e5118db0d810, ed8649f3822e211d025bcab5158af6f8a38c8705, 8fbc349e8383125dd2d8de1c1e926279d398ab17
Linux/Linuxgeneric4.12Not reported

Recommended response

  1. 1Check inventory. Check lockfiles and deployed manifests for Linux/Linux, Linux/Linux.
  2. 2Review the reported fix. Update Linux/Linux to 6bacd22e1eae77abf089bbdc016270200a8dc83b if you use the affected versions. Test the change in a non-production environment first.

Evidence timeline and material changes

  1. Published upstream

    Jul 19, 2026

    Evidence: source:cvelist:source_dates:source-dates:record

  2. Source modified

    Oct 21, 2026

    Evidence: source:cvelist:source_dates:source-dates:record

  3. First seen by HOL

    Oct 21, 2026

Sources and claim methodology

  • Source referencegit.kernel.org
  • Source referencegit.kernel.org
  • Source referencegit.kernel.org
  • Source referencegit.kernel.org
  • Source referencegit.kernel.org
Upstream source description

In the Linux kernel, the following vulnerability has been resolved: usb: typec: tcpm: validate VDO count in Discover Identity ACK handlers Properly validate the count passed from a device when calling svdm_consume_identity() or svdm_consume_identity_sop_prime() as the device-controlled value could index off of the static arrays, which could leak data.

Quoted source text, attributed separately from HOL analysis.

Record context

Vulnerability class
Vulnerability
EPSS
Not reported
CWE IDs
Not reported
Source
CVE List V5
Source checked
Oct 21, 2026
References
5 linked sources
Open source record