CVE-2026-63971: Software Security Vulnerability Vulnerability

HIGH
Advisory Identifier: GHSA-p8fw-9cj8-hc3p
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CVSS 7.8
CWE-362
Published
Advisory Summary

CVE-2026-63971 is a HIGH (CVSS 7.8) security vulnerability vulnerability (CWE-362: Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')) affecting Software libraries in the Maven ecosystem. The weakness occurs when the product contains a concurrent code sequence that requires temporary, exclusive access to a shared resource, but a timing window exists in which the shared resource can be modified by another code sequence operating concurrently.. Remediation is available in the latest vendor maintenance releases.

CVE-2026-63971 at a Glance

CVE Identifier CVE-2026-63971
GHSA Identifier GHSA-p8fw-9cj8-hc3p
Severity HIGH
CVSS v3.1 Base Score 7.8
CWE Classification CWE-362: Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')
Affected Product Software
Package Ecosystem Maven
Published Date
Last Updated

Security Impact

CVSS: 7.8

The security impact metrics below are parsed directly from the CVSS v3.1 vector string (CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H).

Attack Vector Local (AV:L)
Attack Complexity Low (AC:L)
Privileges Required Low (PR:L)
User Interaction None (UI:N)
Scope Unchanged (S:U)
Confidentiality High (C:H)
Integrity High (I:H)
Availability High (A:H)

How to Fix CVE-2026-63971

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-2026-63971, 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 CWE-362: Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition'), where the product contains a concurrent code sequence that requires temporary, exclusive access to a shared resource, but a timing window exists in which the shared resource can be modified by another code sequence operating concurrently. 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: sctp: fix race between sctp_wait_for_connect and peeloff sctp_wait_for_connect() drops and re-acquires the socket lock while waiting for the association to reach ESTABLISHED state. During this window, another thread can peeloff the association to a new socket via getsockopt(SCTP_SOCKOPT_PEELOFF), changing asoc->base.sk. After re-acquiring the old socket lock, sctp_wait_for_connect() returns success without noticing the migration — the caller then accesses the association under the wrong lock in sctp_datamsg_from_user(). Add the same sk != asoc->base.sk check that sctp_wait_for_sndbuf() already has, returning an error if the association was migrated while we slept.

References

NVD — CVE-2026-63971 NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-63971
git.kernel.org/stable/c/0e0d5bc76f... WEB
https://git.kernel.org/stable/c/0e0d5bc76fd4267a71334fcc8f1a5fbcf997845d
git.kernel.org/stable/c/6140cfa721... WEB
https://git.kernel.org/stable/c/6140cfa721451fa6e18e134e709703c2bf34d0fb
git.kernel.org/stable/c/634a9af8a2... WEB
https://git.kernel.org/stable/c/634a9af8a26a84d8b0d7b3b643204b344b42d9fb
git.kernel.org/stable/c/68667ee4c7... WEB
https://git.kernel.org/stable/c/68667ee4c7dadf7f63167234e2a1af09b3f7874e
git.kernel.org/stable/c/7d2038d4b8... WEB
https://git.kernel.org/stable/c/7d2038d4b80166f7bead8d07eba3b97405816c21
git.kernel.org/stable/c/8e9b56051d... WEB
https://git.kernel.org/stable/c/8e9b56051d24540cfbf39194618708c4a7633549
git.kernel.org/stable/c/bcfeac79af... WEB
https://git.kernel.org/stable/c/bcfeac79af740735ace44008b4a11b8e5add20f5
git.kernel.org/stable/c/f14fe6395a... WEB
https://git.kernel.org/stable/c/f14fe6395a8b3d961a61e138ad7b36ba3626dd4e

Frequently Asked Questions

What is CVE-2026-63971?
CVE-2026-63971 is a security vulnerability in Software classified as a security vulnerability vulnerability under CWE-362: Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition').
Which Software versions are affected?
Affected versions include releases prior to current release patches.
What version fixes CVE-2026-63971?
Upgrading to current release patches (or the latest patched release for your respective branch) resolves the vulnerability.
What is the CVSS score of CVE-2026-63971?
CVE-2026-63971 has a CVSS v3.1 base score of 7.8 (HIGH) with vector string CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.
What CWE is associated with CVE-2026-63971?
CVE-2026-63971 is classified under CWE-362: Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition') (The product contains a concurrent code sequence that requires temporary, exclusive access to a shared resource, but a timing window exists in which the shared resource can be modified by another code sequence operating concurrently.).
How can I check Maven dependencies for CVE-2026-63971?
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 
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  "id" : "GHSA-p8fw-9cj8-hc3p",
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  "published" : "2026-07-19T18:31:47Z",
  "aliases" : [ "CVE-2026-63971" ],
  "details" : "In the Linux kernel, the following vulnerability has been resolved:\n\nsctp: fix race between sctp_wait_for_connect and peeloff\n\nsctp_wait_for_connect() drops and re-acquires the socket lock while\nwaiting for the association to reach ESTABLISHED state. During this\nwindow, another thread can peeloff the association to a new socket via\ngetsockopt(SCTP_SOCKOPT_PEELOFF), changing asoc->base.sk. After\nre-acquiring the old socket lock, sctp_wait_for_connect() returns\nsuccess without noticing the migration — the caller then accesses\nthe association under the wrong lock in sctp_datamsg_from_user().\n\nAdd the same sk != asoc->base.sk check that sctp_wait_for_sndbuf()\nalready has, returning an error if the association was migrated while\nwe slept.",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H"
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    "type" : "WEB",
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    "url" : "https://git.kernel.org/stable/c/634a9af8a26a84d8b0d7b3b643204b344b42d9fb"
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  "database_specific" : {
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    "github_reviewed_at" : null,
    "nvd_published_at" : "2026-07-19T16:17:16Z"
  }
}