CVE-2026-63960: Software Security Vulnerability Vulnerability

UNKNOWN
Advisory Identifier: GHSA-5mqj-jpm9-chwp
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Advisory Summary

CVE-2026-63960 is a security vulnerability vulnerability (General Security Weakness) affecting Software libraries in the Maven ecosystem. Remediation is available in the latest vendor maintenance releases.

CVE-2026-63960 at a Glance

CVE Identifier CVE-2026-63960
GHSA Identifier GHSA-5mqj-jpm9-chwp
Severity N/A
CVSS v3.1 Base Score N/A
CWE Classification General Security Weakness
Affected Product Software
Package Ecosystem Maven
Published Date
Last Updated

How to Fix CVE-2026-63960

To remediate this vulnerability, upgrade all affected Software dependencies to a patched release. Both direct and transitive dependencies should be checked, as frameworks or security libraries may pull in vulnerable versions transitively.

Verify Direct and Transitive Dependencies

Run the following command in your project directory to verify that all resolved dependencies use the patched release: 

mvn dependency:tree

How to Check if You Are Affected

To determine whether your Java application is affected by CVE-2026-63960, inspect your build dependencies using the Maven Dependency Plugin:

mvn dependency:tree

Analyze the terminal output to locate any version of Software in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than the patched release), your application is affected.

Note: The mvn dependency:tree command inspects the resolved dependency graph declared in your project's POM files; it does not perform automated security scanning or inspect runtime dynamic classpaths. Always verify runtime container classpaths and shaded JARs.

Technical Details

Vulnerability Mechanism & Technical Analysis

This vulnerability is classified under General Security Weakness. In Software, software state validation or input boundaries are circumvented during processing. Review the official source advisory statement below for specific affected components, classes, and reproduction details.

Source Advisory Statement

In the Linux kernel, the following vulnerability has been resolved: usb: typec: wcove: don't write past struct pd_message in wcove_read_rx_buffer() wcove_read_rx_buffer() copies the PD RX FIFO into the caller's struct pd_message with for (i = 0; i < USBC_RXINFO_RXBYTES(info); i++) regmap_read(wcove->regmap, USBC_RX_DATA + i, msg + i); which has two problems: USBC_RXINFO_RXBYTES() is a 5-bit field (max 31) while struct pd_message is 30 bytes (__le16 header + __le32 payload[PD_MAX_PAYLOAD], packed). The byte count latched in RXINFO is the number of bytes the port partner put on the wire, so a malicious partner that transmits a 31-byte frame can drive the loop one byte past the destination if the WCOVE BMC receiver does not enforce the PD object-count limit in hardware. The existing FIXME flagged this as unverified. Independently, regmap_read() takes an unsigned int * and stores a full unsigned int at the destination. Passing the byte pointer msg + i means each iteration writes four bytes; the high three are zero (val_bits is 8) and are normally overwritten by the next iteration, but the final iteration's high bytes are not. With RXBYTES == 30 the i == 29 iteration already writes three zero bytes past msg, which sits on the IRQ thread's stack in wcove_typec_irq(). Clamp the loop to sizeof(struct pd_message) and read each register into a local before storing only its low byte, so the copy can never exceed the destination regardless of what RXINFO reports.

References

NVD — CVE-2026-63960 NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-63960
git.kernel.org/stable/c/3e632098d0... WEB
https://git.kernel.org/stable/c/3e632098d0521257ea965bbd6fde807d9bee5c8a
git.kernel.org/stable/c/3f9d50c8b0... WEB
https://git.kernel.org/stable/c/3f9d50c8b02b4af0646aa892465080f9061fc89c
git.kernel.org/stable/c/4af7ad0e6d... WEB
https://git.kernel.org/stable/c/4af7ad0e6d7aa4403dbb1dac7b9659b0421efcaa
git.kernel.org/stable/c/5cd0e7ac4e... WEB
https://git.kernel.org/stable/c/5cd0e7ac4eefbdb330f8c72694fe74e63df65552
git.kernel.org/stable/c/6899f5b6d7... WEB
https://git.kernel.org/stable/c/6899f5b6d7b83ce79a3d331dc61dd31bf73f9c22
git.kernel.org/stable/c/d0e4b8b3c6... WEB
https://git.kernel.org/stable/c/d0e4b8b3c6b7607a16932556eaaca5d5cf69f192
git.kernel.org/stable/c/e94933dc41... WEB
https://git.kernel.org/stable/c/e94933dc41b87503bf585c8c6d53d740620eceb9
git.kernel.org/stable/c/f2a1edc0bd... WEB
https://git.kernel.org/stable/c/f2a1edc0bd142edabc6c85d88713f2bc178dd317

Frequently Asked Questions

What is CVE-2026-63960?
CVE-2026-63960 is a security vulnerability in Software classified as a security vulnerability vulnerability under General Security Weakness.
Which Software versions are affected?
Affected versions include releases prior to current release patches.
What version fixes CVE-2026-63960?
Upgrading to current release patches (or the latest patched release for your respective branch) resolves the vulnerability.
What CWE is associated with CVE-2026-63960?
CVE-2026-63960 is classified under General Security Weakness.
How can I check Maven dependencies for CVE-2026-63960?
Run the dependency tree command: 'mvn dependency:tree'. This command lists direct and transitive dependencies in your build configuration so you can verify if a vulnerable version is resolved.
Machine-readable OSV JSON OSV v1.5 Schema
Normalized schema output
View Raw JSON 
{
  "schema_version" : "1.4.0",
  "id" : "GHSA-5mqj-jpm9-chwp",
  "modified" : "2026-07-19T18:31:48Z",
  "published" : "2026-07-19T18:31:47Z",
  "aliases" : [ "CVE-2026-63960" ],
  "details" : "In the Linux kernel, the following vulnerability has been resolved:\n\nusb: typec: wcove: don't write past struct pd_message in wcove_read_rx_buffer()\n\nwcove_read_rx_buffer() copies the PD RX FIFO into the caller's\nstruct pd_message with\n\n\tfor (i = 0; i < USBC_RXINFO_RXBYTES(info); i++)\n\t\tregmap_read(wcove->regmap, USBC_RX_DATA + i, msg + i);\n\nwhich has two problems:\n\nUSBC_RXINFO_RXBYTES() is a 5-bit field (max 31) while struct pd_message\nis 30 bytes (__le16 header + __le32 payload[PD_MAX_PAYLOAD], packed).\nThe byte count latched in RXINFO is the number of bytes the port partner\nput on the wire, so a malicious partner that transmits a 31-byte frame\ncan drive the loop one byte past the destination if the WCOVE BMC\nreceiver does not enforce the PD object-count limit in hardware. The\nexisting FIXME flagged this as unverified.\n\nIndependently, regmap_read() takes an unsigned int * and stores a full\nunsigned int at the destination. Passing the byte pointer msg + i means\neach iteration writes four bytes; the high three are zero (val_bits is\n8) and are normally overwritten by the next iteration, but the final\niteration's high bytes are not. With RXBYTES == 30 the i == 29 iteration\nalready writes three zero bytes past msg, which sits on the IRQ thread's\nstack in wcove_typec_irq().\n\nClamp the loop to sizeof(struct pd_message) and read each register into\na local before storing only its low byte, so the copy can never exceed\nthe destination regardless of what RXINFO reports.",
  "severity" : [ ],
  "affected" : [ ],
  "references" : [ {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2026-63960"
  }, {
    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/3e632098d0521257ea965bbd6fde807d9bee5c8a"
  }, {
    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/3f9d50c8b02b4af0646aa892465080f9061fc89c"
  }, {
    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/4af7ad0e6d7aa4403dbb1dac7b9659b0421efcaa"
  }, {
    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/5cd0e7ac4eefbdb330f8c72694fe74e63df65552"
  }, {
    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/6899f5b6d7b83ce79a3d331dc61dd31bf73f9c22"
  }, {
    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/d0e4b8b3c6b7607a16932556eaaca5d5cf69f192"
  }, {
    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/e94933dc41b87503bf585c8c6d53d740620eceb9"
  }, {
    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/f2a1edc0bd142edabc6c85d88713f2bc178dd317"
  } ],
  "database_specific" : {
    "cwe_ids" : [ ],
    "severity" : null,
    "github_reviewed" : false,
    "github_reviewed_at" : null,
    "nvd_published_at" : "2026-07-19T16:17:14Z"
  }
}