CVE-2026-63912: Software Security Vulnerability Vulnerability

CRITICAL
Advisory Identifier: GHSA-6c6h-95cx-j99f
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CVSS 9.8
CWE-125
Published
Advisory Summary

CVE-2026-63912 is a CRITICAL (CVSS 9.8) security vulnerability vulnerability (CWE-125: Out-of-bounds Read) affecting Software libraries in the Maven ecosystem. The weakness occurs when the product reads data past the end, or before the beginning, of the intended buffer.. Remediation is available in the latest vendor maintenance releases.

CVE-2026-63912 at a Glance

CVE Identifier CVE-2026-63912
GHSA Identifier GHSA-6c6h-95cx-j99f
Severity CRITICAL
CVSS v3.1 Base Score 9.8
CWE Classification CWE-125: Out-of-bounds Read
Affected Product Software
Package Ecosystem Maven
Published Date
Last Updated

Security Impact

CVSS: 9.8

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

Attack Vector Network (AV:N)
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-2026-63912

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-2026-63912, 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-125: Out-of-bounds Read, where the product reads data past the end, or before the beginning, of the intended buffer. 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: xfrm: esp: restore combined single-frag length gate The ESP out-of-place fast path appends the trailer in esp_output_head() before esp_output_tail() allocates the destination page frag. The head-side gate currently checks skb->data_len and tailen separately, but the tail code allocates a single destination frag from the combined post-trailer skb->data_len. Reject the page-frag fast path when the combined aligned length exceeds a page. Otherwise skb_page_frag_refill() may fall back to a single page while the destination sg still spans the combined skb->data_len. Restore this combined-length page gate for both IPv4 and IPv6.

References

NVD — CVE-2026-63912 NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-63912
git.kernel.org/stable/c/322e48187e... WEB
https://git.kernel.org/stable/c/322e48187e0245ab2fff6fec2220b0cae677dbec
git.kernel.org/stable/c/36519e3d94... WEB
https://git.kernel.org/stable/c/36519e3d941fc99d3b52c134dbaf311f987a4708
git.kernel.org/stable/c/5662957355... WEB
https://git.kernel.org/stable/c/566295735530ee513326049b0540f32ec050bf2e
git.kernel.org/stable/c/5d7ab86e2b... WEB
https://git.kernel.org/stable/c/5d7ab86e2b6bc23054616bf6ac562013bf60af8c
git.kernel.org/stable/c/65f3b3fc23... WEB
https://git.kernel.org/stable/c/65f3b3fc2347b89fe21db1e92c7681368415f095
git.kernel.org/stable/c/b84091cedd... WEB
https://git.kernel.org/stable/c/b84091ceddc9f133229dceab3ccc930bf27f9cba
git.kernel.org/stable/c/c093468aea... WEB
https://git.kernel.org/stable/c/c093468aea8277f77272a4f199b2e15e19cabb59
git.kernel.org/stable/c/dfa0d7b0ff... WEB
https://git.kernel.org/stable/c/dfa0d7b0ff1eb6b2c416b8fdb9b4f2cefba57a40

Frequently Asked Questions

What is CVE-2026-63912?
CVE-2026-63912 is a security vulnerability in Software classified as a security vulnerability vulnerability under CWE-125: Out-of-bounds Read.
Which Software versions are affected?
Affected versions include releases prior to current release patches.
What version fixes CVE-2026-63912?
Upgrading to current release patches (or the latest patched release for your respective branch) resolves the vulnerability.
What is the CVSS score of CVE-2026-63912?
CVE-2026-63912 has a CVSS v3.1 base score of 9.8 (CRITICAL) with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.
What CWE is associated with CVE-2026-63912?
CVE-2026-63912 is classified under CWE-125: Out-of-bounds Read (The product reads data past the end, or before the beginning, of the intended buffer.).
How can I check Maven dependencies for CVE-2026-63912?
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-6c6h-95cx-j99f",
  "modified" : "2026-07-20T15:31:50Z",
  "published" : "2026-07-19T18:31:45Z",
  "aliases" : [ "CVE-2026-63912" ],
  "details" : "In the Linux kernel, the following vulnerability has been resolved:\n\nxfrm: esp: restore combined single-frag length gate\n\nThe ESP out-of-place fast path appends the trailer in esp_output_head()\nbefore esp_output_tail() allocates the destination page frag. The\nhead-side gate currently checks skb->data_len and tailen separately, but\nthe tail code allocates a single destination frag from the combined\npost-trailer skb->data_len.\n\nReject the page-frag fast path when the combined aligned length exceeds a\npage. Otherwise skb_page_frag_refill() may fall back to a single page while\nthe destination sg still spans the combined skb->data_len.\n\nRestore this combined-length page gate for both IPv4 and IPv6.",
  "severity" : [ {
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    "score" : "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H"
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    "nvd_published_at" : "2026-07-19T16:17:09Z"
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