CVE-2026-64318: Software Security Vulnerability Vulnerability

HIGH
Advisory Identifier: GHSA-499p-p84w-r6w8
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CVSS 7.1
Published
Advisory Summary

CVE-2026-64318 is a HIGH (CVSS 7.1) security vulnerability vulnerability (General Security Weakness) affecting Software libraries in the Maven ecosystem. Remediation is available in the latest vendor maintenance releases.

CVE-2026-64318 at a Glance

CVE Identifier CVE-2026-64318
GHSA Identifier GHSA-499p-p84w-r6w8
Severity HIGH
CVSS v3.1 Base Score 7.1
CWE Classification General Security Weakness
Affected Product Software
Package Ecosystem Maven
Published Date
Last Updated

Security Impact

CVSS: 7.1

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:N/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 None (I:N)
Availability High (A:H)

How to Fix CVE-2026-64318

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-2026-64318, 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: partitions: aix: bound the pp_count scan to the ppe array aix_partition() reads the physical volume descriptor into a fixed-size struct pvd and then scans its physical-partition-extent array: int numpps = be16_to_cpu(pvd->pp_count); ... for (i = 0; i < numpps; i += 1) { struct ppe *p = pvd->ppe + i; ... lp_ix = be16_to_cpu(p->lp_ix); pvd points at a single kmalloc()'d struct pvd whose ppe[] member holds a fixed ARRAY_SIZE(pvd->ppe) (1016) entries, but the loop runs up to the on-disk pp_count. pp_count is an unvalidated __be16 read straight from the descriptor, so a crafted AIX image with pp_count larger than 1016 drives the loop to read pvd->ppe[i] past the end of the allocation (up to 65535 entries, ~2 MB out of bounds). The partition scan runs without mounting anything, when a block device with a crafted AIX/IBM partition table appears (an attacker-supplied image attached with losetup -P, or a device auto-scanned by udev), via msdos_partition() -> aix_partition(). Clamp the scan to the number of entries the ppe[] array can hold.

References

NVD — CVE-2026-64318 NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-64318
git.kernel.org/stable/c/0986165161... WEB
https://git.kernel.org/stable/c/09861651617ba0fec089e8b9477439e68398c110
git.kernel.org/stable/c/2dc0bfd2fe... WEB
https://git.kernel.org/stable/c/2dc0bfd2fe355fb930de63c2f2eb8ced8570c579
git.kernel.org/stable/c/44f37ee92f... WEB
https://git.kernel.org/stable/c/44f37ee92fdcd377c41bdf6a31cdd8cc7d4c410e
git.kernel.org/stable/c/4671bb74bb... WEB
https://git.kernel.org/stable/c/4671bb74bba05fdd4acf670a35758c29e8c97b83
git.kernel.org/stable/c/5eacdb1967... WEB
https://git.kernel.org/stable/c/5eacdb1967378f5e5591cd27a2d8cdee2df1a599
git.kernel.org/stable/c/b5e9c09309... WEB
https://git.kernel.org/stable/c/b5e9c09309e18fd9839ad007c238120353ca0cc4
git.kernel.org/stable/c/ce93228e21... WEB
https://git.kernel.org/stable/c/ce93228e2193a17d2c58b656e439bb39fe5c3af8
git.kernel.org/stable/c/fd94a77902... WEB
https://git.kernel.org/stable/c/fd94a779020f2ecc8b2607f4c20b34acb1763b9a

Frequently Asked Questions

What is CVE-2026-64318?
CVE-2026-64318 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-2026-64318?
Upgrading to current release patches (or the latest patched release for your respective branch) resolves the vulnerability.
What is the CVSS score of CVE-2026-64318?
CVE-2026-64318 has a CVSS v3.1 base score of 7.1 (HIGH) with vector string CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H.
What CWE is associated with CVE-2026-64318?
CVE-2026-64318 is classified under General Security Weakness.
How can I check Maven dependencies for CVE-2026-64318?
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-499p-p84w-r6w8",
  "modified" : "2026-07-27T06:30:32Z",
  "published" : "2026-07-25T12:31:31Z",
  "aliases" : [ "CVE-2026-64318" ],
  "details" : "In the Linux kernel, the following vulnerability has been resolved:\n\npartitions: aix: bound the pp_count scan to the ppe array\n\naix_partition() reads the physical volume descriptor into a fixed-size\nstruct pvd and then scans its physical-partition-extent array:\n\n\tint numpps = be16_to_cpu(pvd->pp_count);\n\t...\n\tfor (i = 0; i < numpps; i += 1) {\n\t\tstruct ppe *p = pvd->ppe + i;\n\t\t...\n\t\tlp_ix = be16_to_cpu(p->lp_ix);\n\npvd points at a single kmalloc()'d struct pvd whose ppe[] member holds a\nfixed ARRAY_SIZE(pvd->ppe) (1016) entries, but the loop runs up to the\non-disk pp_count.  pp_count is an unvalidated __be16 read straight from\nthe descriptor, so a crafted AIX image with pp_count larger than 1016\ndrives the loop to read pvd->ppe[i] past the end of the allocation (up\nto 65535 entries, ~2 MB out of bounds).\n\nThe partition scan runs without mounting anything, when a block device\nwith a crafted AIX/IBM partition table appears (an attacker-supplied\nimage attached with losetup -P, or a device auto-scanned by udev), via\nmsdos_partition() -> aix_partition().\n\nClamp the scan to the number of entries the ppe[] array can hold.",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H"
  } ],
  "affected" : [ ],
  "references" : [ {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2026-64318"
  }, {
    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/09861651617ba0fec089e8b9477439e68398c110"
  }, {
    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/2dc0bfd2fe355fb930de63c2f2eb8ced8570c579"
  }, {
    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/44f37ee92fdcd377c41bdf6a31cdd8cc7d4c410e"
  }, {
    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/4671bb74bba05fdd4acf670a35758c29e8c97b83"
  }, {
    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/5eacdb1967378f5e5591cd27a2d8cdee2df1a599"
  }, {
    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/b5e9c09309e18fd9839ad007c238120353ca0cc4"
  }, {
    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/ce93228e2193a17d2c58b656e439bb39fe5c3af8"
  }, {
    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/fd94a779020f2ecc8b2607f4c20b34acb1763b9a"
  } ],
  "database_specific" : {
    "cwe_ids" : [ ],
    "severity" : "HIGH",
    "github_reviewed" : false,
    "github_reviewed_at" : null,
    "nvd_published_at" : "2026-07-25T10:17:13Z"
  }
}