CVE-2026-63834: Software Security Vulnerability Vulnerability

UNKNOWN
Advisory Identifier: GHSA-946h-284m-vvp5
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Advisory Summary

CVE-2026-63834 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-2026-63834 at a Glance

CVE Identifier CVE-2026-63834
GHSA Identifier GHSA-946h-284m-vvp5
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-2026-63834

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-2026-63834, 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: batman-adv: tp_meter: restrict number of unacked list entries When the unacked_list is unbound, an attacker could send messages with small lengths and appropriated seqno + gaps to force the receiver to allocate more and more unacked_list entries. And the end either causing an out-of-memory situation or increase the management overhead for the (large) list that significant portions of CPU cycles are wasted in searching through the list. When limiting the list to a specific number, it is important to still correctly add a new entry to the list. But if the list became larger than the limit, the last entry of the list (with the highest seqno) must be dropped to still allow the earlier seqnos to finish and therefore to continue the process. Otherwise, the process might get stuck with too high seqnos which are not handled by batadv_tp_ack_unordered().

References

NVD — CVE-2026-63834 NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-63834
git.kernel.org/stable/c/1111a3381b... WEB
https://git.kernel.org/stable/c/1111a3381bca2d1f084a07686bc783af5ab23df7
git.kernel.org/stable/c/1c616b0be4... WEB
https://git.kernel.org/stable/c/1c616b0be4bd8399d485e25e91859373b95d6013
git.kernel.org/stable/c/1fb8762600... WEB
https://git.kernel.org/stable/c/1fb8762600a393d1caccd63be5d07e1756982d68
git.kernel.org/stable/c/2233787658... WEB
https://git.kernel.org/stable/c/2233787658db859f0a9b83cb397cf783bb8be865
git.kernel.org/stable/c/31a88792bf... WEB
https://git.kernel.org/stable/c/31a88792bfba142be3c9521538c1db805677381f
git.kernel.org/stable/c/c6231d628d... WEB
https://git.kernel.org/stable/c/c6231d628d06d841bc1617b2f7034f5f39876b16
git.kernel.org/stable/c/e7c775110e... WEB
https://git.kernel.org/stable/c/e7c775110e1858e5a7471a23a9c9658c0af9df89
git.kernel.org/stable/c/f8c499fd27... WEB
https://git.kernel.org/stable/c/f8c499fd275e59203b77fca76ae6ef2d096c2133

Frequently Asked Questions

What is CVE-2026-63834?
CVE-2026-63834 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-2026-63834?
Upgrading to current release patches (or the latest patched release for your respective branch) resolves the vulnerability.
What CWE is associated with CVE-2026-63834?
CVE-2026-63834 is classified under General Security Weakness.
How can I check Maven dependencies for CVE-2026-63834?
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-946h-284m-vvp5",
  "modified" : "2026-07-19T12:30:24Z",
  "published" : "2026-07-19T12:30:24Z",
  "aliases" : [ "CVE-2026-63834" ],
  "details" : "In the Linux kernel, the following vulnerability has been resolved:\n\nbatman-adv: tp_meter: restrict number of unacked list entries\n\nWhen the unacked_list is unbound, an attacker could send messages with\nsmall lengths and appropriated seqno + gaps to force the receiver to\nallocate more and more unacked_list entries. And the end either causing an\nout-of-memory situation or increase the management overhead for the (large)\nlist that significant portions of CPU cycles are wasted in searching\nthrough the list.\n\nWhen limiting the list to a specific number, it is important to still\ncorrectly add a new entry to the list. But if the list became larger than\nthe limit, the last entry of the list (with the highest seqno) must be\ndropped to still allow the earlier seqnos to finish and therefore to\ncontinue the process. Otherwise, the process might get stuck with too high\nseqnos which are not handled by batadv_tp_ack_unordered().",
  "severity" : [ ],
  "affected" : [ ],
  "references" : [ {
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  }, {
    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/1c616b0be4bd8399d485e25e91859373b95d6013"
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  "database_specific" : {
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  }
}