CVE-2026-64294: Software Security Vulnerability Vulnerability

MODERATE
Advisory Identifier: GHSA-rgg7-9234-2h22
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CVSS 5.5
Published
Advisory Summary

CVE-2026-64294 is a MODERATE (CVSS 5.5) security vulnerability vulnerability (General Security Weakness) affecting Software libraries in the Maven ecosystem. Remediation is available in the latest vendor maintenance releases.

CVE-2026-64294 at a Glance

CVE Identifier CVE-2026-64294
GHSA Identifier GHSA-rgg7-9234-2h22
Severity MODERATE
CVSS v3.1 Base Score 5.5
CWE Classification General Security Weakness
Affected Product Software
Package Ecosystem Maven
Published Date
Last Updated

Security Impact

CVSS: 5.5

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

How to Fix CVE-2026-64294

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-2026-64294, 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: mm: do file ownership checks with the proper mount idmap Ever since idmapped mounts were introduced, inode ownership checks (for side-channel protection) in mincore() and madvise(MADV_PAGEOUT) were done against the nop_mnt_idmap, which completely ignores the file's mount's idmap. This results in odd edgecases like: 1) mount/bind-mount with an idmap userA:userB:1 2) userB runs an owner_or_capable() check on file that is owned by userA on-disk/in-memory, but owned by userB after idmap translation 3) owner_or_capable() mysteriously fails as the correct idmap wasn't supplied In the case of mincore/madvise MADV_PAGEOUT, this is usually benign, because file_permission(file, MAY_WRITE) will probably succeed, as it uses the proper idmap internally, but it does not need to be the case on e.g a 0444 file where even the owner itself doesn't have permissions to write to it. Since this is clearly not trivial to get right, introduce a file_owner_or_capable() that can carry the correct semantics, and switch the various users in mm to it. The issue was found by manual code inspection & an off-list discussion with Jan Kara.

References

NVD — CVE-2026-64294 NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-64294
git.kernel.org/stable/c/04ba248d02... WEB
https://git.kernel.org/stable/c/04ba248d02d9eaa3d9077b00a6134caa75fa3e90
git.kernel.org/stable/c/5c942ad7df... WEB
https://git.kernel.org/stable/c/5c942ad7df75925ee166e7f0fb36892d8dde376b
git.kernel.org/stable/c/7368bec565... WEB
https://git.kernel.org/stable/c/7368bec565bac3e536cd43579dbde1e715e6ba61
git.kernel.org/stable/c/744b23aa43... WEB
https://git.kernel.org/stable/c/744b23aa430d52f5c8e4dbff7d71496d6643bed2
git.kernel.org/stable/c/8344bdf062... WEB
https://git.kernel.org/stable/c/8344bdf0629457e532797b42d9d2bbf2a2900bbf
git.kernel.org/stable/c/b2f3d94ea3... WEB
https://git.kernel.org/stable/c/b2f3d94ea310bea9d36d53e9d9b3f45e86c1d893
git.kernel.org/stable/c/e187bc02f8... WEB
https://git.kernel.org/stable/c/e187bc02f8fa4226d62814592cf064ee4557c470

Frequently Asked Questions

What is CVE-2026-64294?
CVE-2026-64294 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-2026-64294?
Upgrading to current release patches (or the latest patched release for your respective branch) resolves the vulnerability.
What is the CVSS score of CVE-2026-64294?
CVE-2026-64294 has a CVSS v3.1 base score of 5.5 (MODERATE) with vector string CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H.
What CWE is associated with CVE-2026-64294?
CVE-2026-64294 is classified under General Security Weakness.
How can I check Maven dependencies for CVE-2026-64294?
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-rgg7-9234-2h22",
  "modified" : "2026-08-23T15:32:55Z",
  "published" : "2026-07-25T12:31:29Z",
  "aliases" : [ "CVE-2026-64294" ],
  "details" : "In the Linux kernel, the following vulnerability has been resolved:\n\nmm: do file ownership checks with the proper mount idmap\n\nEver since idmapped mounts were introduced, inode ownership checks (for\nside-channel protection) in mincore() and madvise(MADV_PAGEOUT) were done\nagainst the nop_mnt_idmap, which completely ignores the file's mount's\nidmap.  This results in odd edgecases like:\n\n1) mount/bind-mount with an idmap userA:userB:1\n2) userB runs an owner_or_capable() check on file that is owned by userA\non-disk/in-memory, but owned by userB after idmap translation\n3) owner_or_capable() mysteriously fails as the correct idmap wasn't supplied\n\nIn the case of mincore/madvise MADV_PAGEOUT, this is usually benign,\nbecause file_permission(file, MAY_WRITE) will probably succeed, as it uses\nthe proper idmap internally, but it does not need to be the case on e.g a\n0444 file where even the owner itself doesn't have permissions to write to\nit.\n\nSince this is clearly not trivial to get right, introduce a\nfile_owner_or_capable() that can carry the correct semantics, and switch\nthe various users in mm to it.\n\nThe issue was found by manual code inspection & an off-list discussion\nwith Jan Kara.",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H"
  } ],
  "affected" : [ ],
  "references" : [ {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2026-64294"
  }, {
    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/04ba248d02d9eaa3d9077b00a6134caa75fa3e90"
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    "type" : "WEB",
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  }, {
    "type" : "WEB",
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    "url" : "https://git.kernel.org/stable/c/8344bdf0629457e532797b42d9d2bbf2a2900bbf"
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    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/b2f3d94ea310bea9d36d53e9d9b3f45e86c1d893"
  }, {
    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/e187bc02f8fa4226d62814592cf064ee4557c470"
  } ],
  "database_specific" : {
    "cwe_ids" : [ ],
    "severity" : "MODERATE",
    "github_reviewed" : false,
    "github_reviewed_at" : null,
    "nvd_published_at" : "2026-07-25T10:17:10Z"
  }
}