CVE-2026-63926: Software Security Vulnerability Vulnerability

HIGH
Advisory Identifier: GHSA-39fm-rjr2-46w3
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CVSS 8.4
CWE-190
Published
Advisory Summary

CVE-2026-63926 is a HIGH (CVSS 8.4) security vulnerability vulnerability (CWE-190: Integer Overflow or Wraparound) affecting Software libraries in the Maven ecosystem. The weakness occurs when the product performs a calculation that can produce an integer overflow or wraparound when the logic assumes that the resulting value will always be larger than the original value. this occurs when an integer value is incremented to a value that is too large to store in the associated representation. when this occurs, the value may become a very small or negative number.. Remediation is available in the latest vendor maintenance releases.

CVE-2026-63926 at a Glance

CVE Identifier CVE-2026-63926
GHSA Identifier GHSA-39fm-rjr2-46w3
Severity HIGH
CVSS v3.1 Base Score 8.4
CWE Classification CWE-190: Integer Overflow or Wraparound
Affected Product Software
Package Ecosystem Maven
Published Date
Last Updated

Security Impact

CVSS: 8.4

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

Attack Vector Local (AV:L)
Attack Complexity Low (AC:L)
Privileges Required None (PR:N)
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-2026-63926

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-2026-63926, 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-190: Integer Overflow or Wraparound, where the product performs a calculation that can produce an integer overflow or wraparound when the logic assumes that the resulting value will always be larger than the original value. this occurs when an integer value is incremented to a value that is too large to store in the associated representation. when this occurs, the value may become a very small or negative number. 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: bpf: sockmap: fix tail fragment offset in bpf_msg_push_data When bpf_msg_push_data() inserts data in the middle of a scatterlist entry, it splits the original entry into a left fragment and a right fragment. The right fragment offset is page-local, but the code advances it with `start`, which is the message-global insertion point. For inserts into a non-first SG entry, this over-advances the offset and leaves the split layout inconsistent. Advance the right fragment offset by the fragment-local delta, `start - offset`, which matches the length removed from the front of the original entry.

References

NVD — CVE-2026-63926 NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-63926
git.kernel.org/stable/c/3075c21d2d... WEB
https://git.kernel.org/stable/c/3075c21d2d76c0067f4a382765b43d6cc10470f1
git.kernel.org/stable/c/5e19028667... WEB
https://git.kernel.org/stable/c/5e19028667963fb371ebb00cecc2a473ef92056b
git.kernel.org/stable/c/63f64a510c... WEB
https://git.kernel.org/stable/c/63f64a510c7917658ddf4d073ece73914ee25346
git.kernel.org/stable/c/96b72672ce... WEB
https://git.kernel.org/stable/c/96b72672ce849a1402730238e64d9b20bf06a96d
git.kernel.org/stable/c/aeb9514684... WEB
https://git.kernel.org/stable/c/aeb95146848d12206e1b2cfacd4f40e21ce81d94
git.kernel.org/stable/c/d81b323af2... WEB
https://git.kernel.org/stable/c/d81b323af2dcee47573907ccb89c0df9b45cb2e2
git.kernel.org/stable/c/f14609d814... WEB
https://git.kernel.org/stable/c/f14609d8146707452e0822f3c8154674ce677251
git.kernel.org/stable/c/f72eed9b84... WEB
https://git.kernel.org/stable/c/f72eed9b84fb771019a955908132410a9ba9ea3f

Frequently Asked Questions

What is CVE-2026-63926?
CVE-2026-63926 is a security vulnerability in Software classified as a security vulnerability vulnerability under CWE-190: Integer Overflow or Wraparound.
Which Software versions are affected?
Affected versions include releases prior to current release patches.
What version fixes CVE-2026-63926?
Upgrading to current release patches (or the latest patched release for your respective branch) resolves the vulnerability.
What is the CVSS score of CVE-2026-63926?
CVE-2026-63926 has a CVSS v3.1 base score of 8.4 (HIGH) with vector string CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.
What CWE is associated with CVE-2026-63926?
CVE-2026-63926 is classified under CWE-190: Integer Overflow or Wraparound (The product performs a calculation that can produce an integer overflow or wraparound when the logic assumes that the resulting value will always be larger than the original value. This occurs when an integer value is incremented to a value that is too large to store in the associated representation. When this occurs, the value may become a very small or negative number.).
How can I check Maven dependencies for CVE-2026-63926?
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-39fm-rjr2-46w3",
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  "published" : "2026-07-19T18:31:46Z",
  "aliases" : [ "CVE-2026-63926" ],
  "details" : "In the Linux kernel, the following vulnerability has been resolved:\n\nbpf: sockmap: fix tail fragment offset in bpf_msg_push_data\n\nWhen bpf_msg_push_data() inserts data in the middle of a scatterlist\nentry, it splits the original entry into a left fragment and a right\nfragment.\n\nThe right fragment offset is page-local, but the code advances it with\n`start`, which is the message-global insertion point. For inserts into a\nnon-first SG entry, this over-advances the offset and leaves the split\nlayout inconsistent.\n\nAdvance the right fragment offset by the fragment-local delta,\n`start - offset`, which matches the length removed from the front of the\noriginal entry.",
  "severity" : [ {
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    "score" : "CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H"
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  "database_specific" : {
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    "nvd_published_at" : "2026-07-19T16:17:10Z"
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