CVE-2026-64324: Software Security Vulnerability Vulnerability

HIGH
Advisory Identifier: GHSA-mpf7-xmx2-frhw
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CVSS 7.8
CWE-125 CWE-129
Published
Advisory Summary

CVE-2026-64324 is a HIGH (CVSS 7.8) 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-2026-64324 at a Glance

CVE Identifier CVE-2026-64324
GHSA Identifier GHSA-mpf7-xmx2-frhw
Severity HIGH
CVSS v3.1 Base Score 7.8
CWE Classification CWE-125: Out-of-bounds Read
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-2026-64324

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-2026-64324, 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: udf: validate free block extents against the partition length udf_free_blocks() checks the logical block number and count against the partition length, but drops the extent offset from that final bound. A crafted extent can pass the guard while logicalBlockNum + offset + count points past the partition, which later indexes past the space bitmap array. A single ftruncate(2) on a file backed by such an extent reliably panics the kernel. This is a local availability issue. On desktop systems where UDisks/polkit allows the active user to mount removable UDF media without CAP_SYS_ADMIN, an unprivileged local user can supply the crafted filesystem and trigger the panic by truncating a writable file on it. Systems that require root or CAP_SYS_ADMIN to mount the image have a higher prerequisite. No confidentiality or integrity impact is claimed: the reproduced primitive is an out-of-bounds read of a bitmap pointer slot followed by a kernel panic. Use the already computed logicalBlockNum + offset + count value for the partition length check. Also make load_block_bitmap() reject an out-of-range block group before indexing s_block_bitmap[], so corrupted callers cannot walk past the flexible array.

References

NVD — CVE-2026-64324 NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-64324
git.kernel.org/stable/c/12af328d2e... WEB
https://git.kernel.org/stable/c/12af328d2ee8d68e81ba612246d0b54b22d23e1f
git.kernel.org/stable/c/335202ab25... WEB
https://git.kernel.org/stable/c/335202ab25b01fdd45889ff25eab70864686dea3
git.kernel.org/stable/c/5f0419457f... WEB
https://git.kernel.org/stable/c/5f0419457f89dce1a3f1c8e62a3adf2f39ab8168
git.kernel.org/stable/c/9442d75429... WEB
https://git.kernel.org/stable/c/9442d75429b0c556292a7454fe888d54259f5240
git.kernel.org/stable/c/b54aee5652... WEB
https://git.kernel.org/stable/c/b54aee5652fcd7c23a0904a4623ec462c3edc70c
git.kernel.org/stable/c/be87de7789... WEB
https://git.kernel.org/stable/c/be87de7789a82a030a4896bc7683415ec9fa6f2b
git.kernel.org/stable/c/fb49099206... WEB
https://git.kernel.org/stable/c/fb49099206c5c57af28a157249fa7bcb5518f99e
git.kernel.org/stable/c/fdd6229d2a... WEB
https://git.kernel.org/stable/c/fdd6229d2ae9914c1f25d1041db0f4f312a4fa76

Frequently Asked Questions

What is CVE-2026-64324?
CVE-2026-64324 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-2026-64324?
Upgrading to current release patches (or the latest patched release for your respective branch) resolves the vulnerability.
What is the CVSS score of CVE-2026-64324?
CVE-2026-64324 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-2026-64324?
CVE-2026-64324 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-2026-64324?
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-mpf7-xmx2-frhw",
  "modified" : "2026-07-27T06:30:33Z",
  "published" : "2026-07-25T12:31:31Z",
  "aliases" : [ "CVE-2026-64324" ],
  "details" : "In the Linux kernel, the following vulnerability has been resolved:\n\nudf: validate free block extents against the partition length\n\nudf_free_blocks() checks the logical block number and count against the\npartition length, but drops the extent offset from that final bound.  A\ncrafted extent can pass the guard while logicalBlockNum + offset + count\npoints past the partition, which later indexes past the space bitmap\narray.\n\nA single ftruncate(2) on a file backed by such an extent reliably\npanics the kernel.  This is a local availability issue.  On desktop\nsystems where UDisks/polkit allows the active user to mount removable\nUDF media without CAP_SYS_ADMIN, an unprivileged local user can supply\nthe crafted filesystem and trigger the panic by truncating a writable\nfile on it.  Systems that require root or CAP_SYS_ADMIN to mount the\nimage have a higher prerequisite.\n\nNo confidentiality or integrity impact is claimed: the reproduced\nprimitive is an out-of-bounds read of a bitmap pointer slot followed by\na kernel panic.\n\nUse the already computed logicalBlockNum + offset + count value for the\npartition length check.  Also make load_block_bitmap() reject an\nout-of-range block group before indexing s_block_bitmap[], so corrupted\ncallers cannot walk past the flexible array.",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H"
  } ],
  "affected" : [ ],
  "references" : [ {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2026-64324"
  }, {
    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/12af328d2ee8d68e81ba612246d0b54b22d23e1f"
  }, {
    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/335202ab25b01fdd45889ff25eab70864686dea3"
  }, {
    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/5f0419457f89dce1a3f1c8e62a3adf2f39ab8168"
  }, {
    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/9442d75429b0c556292a7454fe888d54259f5240"
  }, {
    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/b54aee5652fcd7c23a0904a4623ec462c3edc70c"
  }, {
    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/be87de7789a82a030a4896bc7683415ec9fa6f2b"
  }, {
    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/fb49099206c5c57af28a157249fa7bcb5518f99e"
  }, {
    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/fdd6229d2ae9914c1f25d1041db0f4f312a4fa76"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-125", "CWE-129" ],
    "severity" : "HIGH",
    "github_reviewed" : false,
    "github_reviewed_at" : null,
    "nvd_published_at" : "2026-07-25T10:17:13Z"
  }
}