CVE-2026-64158: Software Security Vulnerability Vulnerability

HIGH
Advisory Identifier: GHSA-74f7-4jjx-chgc
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CVSS 7.3
Published
Advisory Summary

CVE-2026-64158 is a HIGH (CVSS 7.3) security vulnerability vulnerability (General Security Weakness) affecting Software libraries in the Maven ecosystem. Remediation is available in the latest vendor maintenance releases.

CVE-2026-64158 at a Glance

CVE Identifier CVE-2026-64158
GHSA Identifier GHSA-74f7-4jjx-chgc
Severity HIGH
CVSS v3.1 Base Score 7.3
CWE Classification General Security Weakness
Affected Product Software
Package Ecosystem Maven
Published Date
Last Updated

Security Impact

CVSS: 7.3

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:L).

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 Low (A:L)

How to Fix CVE-2026-64158

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-2026-64158, 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: netfs: Fix write streaming disablement if fd open O_RDWR In netfs_perform_write(), "write streaming" (the caching of dirty data in dirty but !uptodate folios) is performed to avoid the need to read data that is just going to get immediately overwritten. However, this is/will be disabled in three circumstances: if the fd is open O_RDWR, if fscache is in use (as we need to round out the blocks for DIO) or if content encryption is enabled (again for rounding out purposes). The idea behind disabling it if the fd is open O_RDWR is that we'd need to flush the write-streaming page before we could read the data, particularly through mmap. But netfs now fills in the gaps if ->read_folio() is called on the page, so that is unnecessary. Further, this doesn't actually work if a separate fd is open for reading. Fix this by removing the check for O_RDWR, thereby allowing streaming writes even when we might read. This caused a number of problems with the generic/522 xfstest, but those are now fixed.

References

NVD — CVE-2026-64158 NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-64158
git.kernel.org/stable/c/616578e40d... WEB
https://git.kernel.org/stable/c/616578e40dcba3f94810d841c5a52b7e3bc8ede7
git.kernel.org/stable/c/70a7b9193b... WEB
https://git.kernel.org/stable/c/70a7b9193bbbfceaab5974de66834c64ccc875dd
git.kernel.org/stable/c/7a9fa5b020... WEB
https://git.kernel.org/stable/c/7a9fa5b020a3a40f8291a71cd44c08d931da430d
git.kernel.org/stable/c/9adf8e47d7... WEB
https://git.kernel.org/stable/c/9adf8e47d73d5e3c2fe77dea649dcde350ccd65c

Frequently Asked Questions

What is CVE-2026-64158?
CVE-2026-64158 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-2026-64158?
Upgrading to current release patches (or the latest patched release for your respective branch) resolves the vulnerability.
What is the CVSS score of CVE-2026-64158?
CVE-2026-64158 has a CVSS v3.1 base score of 7.3 (HIGH) with vector string CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:L.
What CWE is associated with CVE-2026-64158?
CVE-2026-64158 is classified under General Security Weakness.
How can I check Maven dependencies for CVE-2026-64158?
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-74f7-4jjx-chgc",
  "modified" : "2026-07-20T15:32:02Z",
  "published" : "2026-07-19T18:31:53Z",
  "aliases" : [ "CVE-2026-64158" ],
  "details" : "In the Linux kernel, the following vulnerability has been resolved:\n\nnetfs: Fix write streaming disablement if fd open O_RDWR\n\nIn netfs_perform_write(), \"write streaming\" (the caching of dirty data in\ndirty but !uptodate folios) is performed to avoid the need to read data\nthat is just going to get immediately overwritten.  However, this is/will\nbe disabled in three circumstances: if the fd is open O_RDWR, if fscache is\nin use (as we need to round out the blocks for DIO) or if content\nencryption is enabled (again for rounding out purposes).\n\nThe idea behind disabling it if the fd is open O_RDWR is that we'd need to\nflush the write-streaming page before we could read the data, particularly\nthrough mmap.  But netfs now fills in the gaps if ->read_folio() is called\non the page, so that is unnecessary.  Further, this doesn't actually work\nif a separate fd is open for reading.\n\nFix this by removing the check for O_RDWR, thereby allowing streaming\nwrites even when we might read.\n\nThis caused a number of problems with the generic/522 xfstest, but those\nare now fixed.",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:L"
  } ],
  "affected" : [ ],
  "references" : [ {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2026-64158"
  }, {
    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/616578e40dcba3f94810d841c5a52b7e3bc8ede7"
  }, {
    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/70a7b9193bbbfceaab5974de66834c64ccc875dd"
  }, {
    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/7a9fa5b020a3a40f8291a71cd44c08d931da430d"
  }, {
    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/9adf8e47d73d5e3c2fe77dea649dcde350ccd65c"
  } ],
  "database_specific" : {
    "cwe_ids" : [ ],
    "severity" : "HIGH",
    "github_reviewed" : false,
    "github_reviewed_at" : null,
    "nvd_published_at" : "2026-07-19T16:17:57Z"
  }
}