CVE-2026-53320: Software Security Vulnerability Vulnerability

MODERATE
Advisory Identifier: GHSA-r88h-63mh-cc6h
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CVSS 5.5
Published
Advisory Summary

CVE-2026-53320 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-2026-53320 at a Glance

CVE Identifier CVE-2026-53320
GHSA Identifier GHSA-r88h-63mh-cc6h
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-2026-53320

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-2026-53320, 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: nilfs2: reject zero bd_oblocknr in nilfs_ioctl_mark_blocks_dirty() nilfs_ioctl_mark_blocks_dirty() uses bd_oblocknr to detect dead blocks by comparing it with the current block number bd_blocknr. If they differ, the block is considered dead and skipped. However, bd_oblocknr should never be 0 since block 0 typically stores the primary superblock and is never a valid GC target block. A corrupted ioctl request with bd_oblocknr set to 0 causes the comparison to incorrectly match when the lookup returns -ENOENT and sets bd_blocknr to 0, bypassing the dead block check and calling nilfs_bmap_mark() on a non-existent block. This causes nilfs_btree_do_lookup() to return -ENOENT, triggering the WARN_ON(ret == -ENOENT). Fix this by rejecting ioctl requests with bd_oblocknr set to 0 at the beginning of each iteration. [ryusuke: slightly modified the commit message and comments for accuracy]

References

NVD — CVE-2026-53320 NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-53320
git.kernel.org/stable/c/4525658002... WEB
https://git.kernel.org/stable/c/4525658002be3ad310b16bf8db48c8adb6a55d32
git.kernel.org/stable/c/65e07964b4... WEB
https://git.kernel.org/stable/c/65e07964b4b2daf9a54e686cf0fa72d74a9648a8
git.kernel.org/stable/c/94094e70fe... WEB
https://git.kernel.org/stable/c/94094e70fe292c9566502772d4d4d6d6a99204b1
git.kernel.org/stable/c/9472d37799... WEB
https://git.kernel.org/stable/c/9472d37799a0b9ff9b99639f35961ac2f0b3c9be
git.kernel.org/stable/c/b88f905d44... WEB
https://git.kernel.org/stable/c/b88f905d4449b70da6bda547be546e365e44352e
git.kernel.org/stable/c/be3e5d1064... WEB
https://git.kernel.org/stable/c/be3e5d10643d3be1cbac9d9939f220a99253f980
git.kernel.org/stable/c/e0a0c4903c... WEB
https://git.kernel.org/stable/c/e0a0c4903cbba351f0f5b5d104960d3a5b23202f
git.kernel.org/stable/c/e5ff0ba4b6... WEB
https://git.kernel.org/stable/c/e5ff0ba4b6983cdbcc826efc201e7179ece5d46f

Frequently Asked Questions

What is CVE-2026-53320?
CVE-2026-53320 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-2026-53320?
Upgrading to current release patches (or the latest patched release for your respective branch) resolves the vulnerability.
What is the CVSS score of CVE-2026-53320?
CVE-2026-53320 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-2026-53320?
CVE-2026-53320 is classified under General Security Weakness.
How can I check Maven dependencies for CVE-2026-53320?
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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  "id" : "GHSA-r88h-63mh-cc6h",
  "modified" : "2026-07-06T21:30:26Z",
  "published" : "2026-06-26T21:32:18Z",
  "aliases" : [ "CVE-2026-53320" ],
  "details" : "In the Linux kernel, the following vulnerability has been resolved:\n\nnilfs2: reject zero bd_oblocknr in nilfs_ioctl_mark_blocks_dirty()\n\nnilfs_ioctl_mark_blocks_dirty() uses bd_oblocknr to detect dead blocks\nby comparing it with the current block number bd_blocknr. If they differ,\nthe block is considered dead and skipped.\n\nHowever, bd_oblocknr should never be 0 since block 0 typically stores the\nprimary superblock and is never a valid GC target block. A corrupted ioctl\nrequest with bd_oblocknr set to 0 causes the comparison to incorrectly\nmatch when the lookup returns -ENOENT and sets bd_blocknr to 0, bypassing\nthe dead block check and calling nilfs_bmap_mark() on a non-existent\nblock. This causes nilfs_btree_do_lookup() to return -ENOENT, triggering\nthe WARN_ON(ret == -ENOENT).\n\nFix this by rejecting ioctl requests with bd_oblocknr set to 0 at the\nbeginning of each iteration.\n\n[ryusuke: slightly modified the commit message and comments for accuracy]",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H"
  } ],
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    "url" : "https://git.kernel.org/stable/c/65e07964b4b2daf9a54e686cf0fa72d74a9648a8"
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    "url" : "https://git.kernel.org/stable/c/e5ff0ba4b6983cdbcc826efc201e7179ece5d46f"
  } ],
  "database_specific" : {
    "cwe_ids" : [ ],
    "severity" : "MODERATE",
    "github_reviewed" : false,
    "github_reviewed_at" : null,
    "nvd_published_at" : "2026-06-26T20:17:25Z"
  }
}