CVE-2026-63871: Software Security Vulnerability Vulnerability

UNKNOWN
Advisory Identifier: GHSA-5243-p4qj-j66v
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Advisory Summary

CVE-2026-63871 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-2026-63871 at a Glance

CVE Identifier CVE-2026-63871
GHSA Identifier GHSA-5243-p4qj-j66v
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-2026-63871

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-2026-63871, 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: Bluetooth: ISO: Fix data-race on iso_pi fields in hci_get_route calls iso_connect_bis(), iso_connect_cis(), iso_listen_bis(), and iso_conn_big_sync() call hci_get_route() using iso_pi(sk)->dst, iso_pi(sk)->src, and iso_pi(sk)->src_type without holding lock_sock(). These fields may be modified concurrently by connect() or setsockopt() on the same socket, resulting in data-races reported by KCSAN. Fix this by snapshotting the required fields under lock_sock() before calling hci_get_route(). BUG: KCSAN: data-race in memcmp+0x45/0xb0 race at unknown origin, with read to 0xffff8880122135cf of 1 bytes by task 333 on cpu 1: memcmp+0x45/0xb0 hci_get_route+0x27e/0x490 iso_connect_cis+0x4c/0xa10 iso_sock_connect+0x60e/0xb30 __sys_connect_file+0xbd/0xe0 __sys_connect+0xe0/0x110 __x64_sys_connect+0x40/0x50 x64_sys_call+0xcad/0x1c60 do_syscall_64+0x133/0x590 entry_SYSCALL_64_after_hwframe+0x77/0x7f

References

NVD — CVE-2026-63871 NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-63871
git.kernel.org/stable/c/859bb1f4cb... WEB
https://git.kernel.org/stable/c/859bb1f4cb615d98c9c1ab2bd76ebb0b8fe46020
git.kernel.org/stable/c/9798f7d41d... WEB
https://git.kernel.org/stable/c/9798f7d41d85ff763afd1f1cc0533b5c416c8348
git.kernel.org/stable/c/9ca7053d62... WEB
https://git.kernel.org/stable/c/9ca7053d6215d89c33f28893bfd1625a32919d3f
git.kernel.org/stable/c/ab84fd7779... WEB
https://git.kernel.org/stable/c/ab84fd7779a2a7ff5d2c8eac212c43733f56216e

Frequently Asked Questions

What is CVE-2026-63871?
CVE-2026-63871 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-2026-63871?
Upgrading to current release patches (or the latest patched release for your respective branch) resolves the vulnerability.
What CWE is associated with CVE-2026-63871?
CVE-2026-63871 is classified under General Security Weakness.
How can I check Maven dependencies for CVE-2026-63871?
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-5243-p4qj-j66v",
  "modified" : "2026-07-19T15:30:28Z",
  "published" : "2026-07-19T15:30:28Z",
  "aliases" : [ "CVE-2026-63871" ],
  "details" : "In the Linux kernel, the following vulnerability has been resolved:\n\nBluetooth: ISO: Fix data-race on iso_pi fields in hci_get_route calls\n\niso_connect_bis(), iso_connect_cis(), iso_listen_bis(), and\niso_conn_big_sync() call hci_get_route() using iso_pi(sk)->dst,\niso_pi(sk)->src, and iso_pi(sk)->src_type without holding lock_sock().\n\nThese fields may be modified concurrently by connect() or setsockopt()\non the same socket, resulting in data-races reported by KCSAN.\n\nFix this by snapshotting the required fields under lock_sock() before\ncalling hci_get_route().\n\nBUG: KCSAN: data-race in memcmp+0x45/0xb0\n\nrace at unknown origin, with read to 0xffff8880122135cf of 1 bytes\nby task 333 on cpu 1:\n memcmp+0x45/0xb0\n hci_get_route+0x27e/0x490\n iso_connect_cis+0x4c/0xa10\n iso_sock_connect+0x60e/0xb30\n __sys_connect_file+0xbd/0xe0\n __sys_connect+0xe0/0x110\n __x64_sys_connect+0x40/0x50\n x64_sys_call+0xcad/0x1c60\n do_syscall_64+0x133/0x590\n entry_SYSCALL_64_after_hwframe+0x77/0x7f",
  "severity" : [ ],
  "affected" : [ ],
  "references" : [ {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2026-63871"
  }, {
    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/859bb1f4cb615d98c9c1ab2bd76ebb0b8fe46020"
  }, {
    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/9798f7d41d85ff763afd1f1cc0533b5c416c8348"
  }, {
    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/9ca7053d6215d89c33f28893bfd1625a32919d3f"
  }, {
    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/ab84fd7779a2a7ff5d2c8eac212c43733f56216e"
  } ],
  "database_specific" : {
    "cwe_ids" : [ ],
    "severity" : null,
    "github_reviewed" : false,
    "github_reviewed_at" : null,
    "nvd_published_at" : "2026-07-19T15:16:54Z"
  }
}