CVE-2026-46289: Software Security Vulnerability Vulnerability

CRITICAL
Advisory Identifier: GHSA-qp34-4r23-mcwx
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CVSS 9.8
CWE-401
Published
Advisory Summary

CVE-2026-46289 is a CRITICAL (CVSS 9.8) security vulnerability vulnerability (CWE-401: Missing Release of Memory after Effective Lifetime) affecting Software libraries in the Maven ecosystem. The weakness occurs when the product does not sufficiently track and release allocated memory after it has been used, making the memory unavailable for reallocation and reuse.. Remediation is available in the latest vendor maintenance releases.

CVE-2026-46289 at a Glance

CVE Identifier CVE-2026-46289
GHSA Identifier GHSA-qp34-4r23-mcwx
Severity CRITICAL
CVSS v3.1 Base Score 9.8
CWE Classification CWE-401: Missing Release of Memory after Effective Lifetime
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-2026-46289

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-2026-46289, 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-401: Missing Release of Memory after Effective Lifetime, where the product does not sufficiently track and release allocated memory after it has been used, making the memory unavailable for reallocation and reuse. 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: lib/scatterlist: fix length calculations in extract_kvec_to_sg Patch series "Fix bugs in extract_iter_to_sg()", v3. Fix bugs in the kvec and user variants of extract_iter_to_sg. This series is growing due to useful remarks made by sashiko.dev. The main bugs are: - The length for an sglist entry when extracting from a kvec can exceed the number of bytes in the page. This is obviously not intended. - When extracting a user buffer the sglist is temporarily used as a scratch buffer for extracted page pointers. If the sglist already contains some elements this scratch buffer could overlap with existing entries in the sglist. The series adds test cases to the kunit_iov_iter test that demonstrate all of these bugs. Additionally, there is a memory leak fix for the test itself. The bugs were orignally introduced into kernel v6.3 where the function lived in fs/netfs/iterator.c. It was later moved to lib/scatterlist.c in v6.5. Thus the actual fix is only marked for backports to v6.5+. This patch (of 5): When extracting from a kvec to a scatterlist, do not cross page boundaries. The required length was already calculated but not used as intended. Adjust the copied length if the loop runs out of sglist entries without extracting everything. While there, return immediately from extract_iter_to_sg if there are no sglist entries at all. A subsequent commit will add kunit test cases that demonstrate that the patch is necessary.

References

NVD — CVE-2026-46289 NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-46289
git.kernel.org/stable/c/07b7d66e65... WEB
https://git.kernel.org/stable/c/07b7d66e65d9cfe6b9c2c34aa22cfcaac37a5c45
git.kernel.org/stable/c/3f17500e86... WEB
https://git.kernel.org/stable/c/3f17500e86d730c76db638bb3ae52f9b5e496c76
git.kernel.org/stable/c/8fbba68290... WEB
https://git.kernel.org/stable/c/8fbba6829057979149d1b37d65690c037f3ddf4d
git.kernel.org/stable/c/9d38756d0a... WEB
https://git.kernel.org/stable/c/9d38756d0a93b66163554219fa9c3365f40c4035
git.kernel.org/stable/c/e5e22fc996... WEB
https://git.kernel.org/stable/c/e5e22fc9963469e678c4f4bb38d26adcec107f1e

Frequently Asked Questions

What is CVE-2026-46289?
CVE-2026-46289 is a security vulnerability in Software classified as a security vulnerability vulnerability under CWE-401: Missing Release of Memory after Effective Lifetime.
Which Software versions are affected?
Affected versions include releases prior to current release patches.
What version fixes CVE-2026-46289?
Upgrading to current release patches (or the latest patched release for your respective branch) resolves the vulnerability.
What is the CVSS score of CVE-2026-46289?
CVE-2026-46289 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-2026-46289?
CVE-2026-46289 is classified under CWE-401: Missing Release of Memory after Effective Lifetime (The product does not sufficiently track and release allocated memory after it has been used, making the memory unavailable for reallocation and reuse.).
How can I check Maven dependencies for CVE-2026-46289?
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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  "schema_version" : "1.4.0",
  "id" : "GHSA-qp34-4r23-mcwx",
  "modified" : "2026-06-14T06:30:23Z",
  "published" : "2026-06-08T18:31:52Z",
  "aliases" : [ "CVE-2026-46289" ],
  "details" : "In the Linux kernel, the following vulnerability has been resolved:\n\nlib/scatterlist: fix length calculations in extract_kvec_to_sg\n\nPatch series \"Fix bugs in extract_iter_to_sg()\", v3.\n\nFix bugs in the kvec and user variants of extract_iter_to_sg.  This series\nis growing due to useful remarks made by sashiko.dev.\n\nThe main bugs are:\n- The length for an sglist entry when extracting from\n  a kvec can exceed the number of bytes in the page. This\n  is obviously not intended.\n- When extracting a user buffer the sglist is temporarily\n  used as a scratch buffer for extracted page pointers.\n  If the sglist already contains some elements this scratch\n  buffer could overlap with existing entries in the sglist.\n\nThe series adds test cases to the kunit_iov_iter test that demonstrate all\nof these bugs.  Additionally, there is a memory leak fix for the test\nitself.\n\nThe bugs were orignally introduced into kernel v6.3 where the function\nlived in fs/netfs/iterator.c.  It was later moved to lib/scatterlist.c in\nv6.5.  Thus the actual fix is only marked for backports to v6.5+.\n\n\nThis patch (of 5):\n\nWhen extracting from a kvec to a scatterlist, do not cross page\nboundaries.  The required length was already calculated but not used as\nintended.\n\nAdjust the copied length if the loop runs out of sglist entries without\nextracting everything.\n\nWhile there, return immediately from extract_iter_to_sg if there are no\nsglist entries at all.\n\nA subsequent commit will add kunit test cases that demonstrate that the\npatch is necessary.",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H"
  } ],
  "affected" : [ ],
  "references" : [ {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2026-46289"
  }, {
    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/07b7d66e65d9cfe6b9c2c34aa22cfcaac37a5c45"
  }, {
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    "url" : "https://git.kernel.org/stable/c/3f17500e86d730c76db638bb3ae52f9b5e496c76"
  }, {
    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/8fbba6829057979149d1b37d65690c037f3ddf4d"
  }, {
    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/9d38756d0a93b66163554219fa9c3365f40c4035"
  }, {
    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/e5e22fc9963469e678c4f4bb38d26adcec107f1e"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-401" ],
    "severity" : "CRITICAL",
    "github_reviewed" : false,
    "github_reviewed_at" : null,
    "nvd_published_at" : "2026-06-08T17:16:47Z"
  }
}