CVE-2026-98521: Software Security Vulnerability Vulnerability

UNKNOWN
Advisory Identifier: GHSA-7hvf-3rfm-fg86
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Advisory Summary

CVE-2026-98521 is a security vulnerability vulnerability (General Security Weakness) affecting Software libraries in the Maven ecosystem. Remediation is available in the latest vendor maintenance releases.

CVE-2026-98521 at a Glance

CVE Identifier CVE-2026-98521
GHSA Identifier GHSA-7hvf-3rfm-fg86
Severity N/A
CVSS v3.1 Base Score N/A
CWE Classification General Security Weakness
Affected Product Software
Package Ecosystem Maven
Published Date
Last Updated

How to Fix CVE-2026-98521

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-2026-98521, 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: drm/i915: fix incorrect RCU teardown order i915_gem_busy_ioctl uses dma_resv_for_each_fence_unlocked() to iterate over the fences in an GEM object without holding a reference but only the RCU read side lock. What can happen here is that the GEM object is destroyed concurrently while i915_gem_busy_ioctl is still running. This won't free the GEM objects memory, but still drops all the dma_fence references. Now when dma_resv_for_each_fence_unlocked() sees a destroyed dma_fence it assumes that a new fence list was installed and re-starts the loop. But in the case of a destroyed GEM object a new fence list is never installed, only the old one freed and therefore the iteration never finishes resulting in an endless loop. The solution is to drop the fence references only after the RCU grace period. The fixes tag is not necessary the patch introducing the problem, but the one making it so worse that we need to address it. This problem was pointed out by Sashiko-bot. (cherry picked from commit 5113479556025093bf8133bb2dcaa33be2d50921)

References

NVD — CVE-2026-98521 NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-98521
git.kernel.org/stable/c/2dd0190e39... WEB
https://git.kernel.org/stable/c/2dd0190e397ec6468095fd3e80e79276a7361449
git.kernel.org/stable/c/4d4ca84213... WEB
https://git.kernel.org/stable/c/4d4ca84213327da1f84ef7af3946dea6b14c5d88
git.kernel.org/stable/c/b12e041aed... WEB
https://git.kernel.org/stable/c/b12e041aedcf9fa77c6002a49f07eb20d0521b86
git.kernel.org/stable/c/c53db9cc24... WEB
https://git.kernel.org/stable/c/c53db9cc245219af6b528ca022a17ebfa91d80ba
git.kernel.org/stable/c/cc890d3f1b... WEB
https://git.kernel.org/stable/c/cc890d3f1b15bf6481dc7270fba0b4fbba572813
git.kernel.org/stable/c/d2da6696e0... WEB
https://git.kernel.org/stable/c/d2da6696e0c4e60414706e607029d0bb0330c67e

Frequently Asked Questions

What is CVE-2026-98521?
CVE-2026-98521 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-2026-98521?
Upgrading to current release patches (or the latest patched release for your respective branch) resolves the vulnerability.
What CWE is associated with CVE-2026-98521?
CVE-2026-98521 is classified under General Security Weakness.
How can I check Maven dependencies for CVE-2026-98521?
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-7hvf-3rfm-fg86",
  "modified" : "2026-10-18T18:31:52Z",
  "published" : "2026-10-18T18:31:52Z",
  "aliases" : [ "CVE-2026-98521" ],
  "details" : "In the Linux kernel, the following vulnerability has been resolved:\n\ndrm/i915: fix incorrect RCU teardown order\n\ni915_gem_busy_ioctl uses dma_resv_for_each_fence_unlocked() to iterate\nover the fences in an GEM object without holding a reference but only\nthe RCU read side lock.\n\nWhat can happen here is that the GEM object is destroyed concurrently\nwhile i915_gem_busy_ioctl is still running. This won't free the GEM\nobjects memory, but still drops all the dma_fence references.\n\nNow when dma_resv_for_each_fence_unlocked() sees a destroyed dma_fence it\nassumes that a new fence list was installed and re-starts the loop.\n\nBut in the case of a destroyed GEM object a new fence list is never\ninstalled, only the old one freed and therefore the iteration never\nfinishes resulting in an endless loop.\n\nThe solution is to drop the fence references only after the RCU grace\nperiod.\n\nThe fixes tag is not necessary the patch introducing the problem, but the\none making it so worse that we need to address it.\n\nThis problem was pointed out by Sashiko-bot.\n\n(cherry picked from commit 5113479556025093bf8133bb2dcaa33be2d50921)",
  "severity" : [ ],
  "affected" : [ ],
  "references" : [ {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2026-98521"
  }, {
    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/2dd0190e397ec6468095fd3e80e79276a7361449"
  }, {
    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/4d4ca84213327da1f84ef7af3946dea6b14c5d88"
  }, {
    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/b12e041aedcf9fa77c6002a49f07eb20d0521b86"
  }, {
    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/c53db9cc245219af6b528ca022a17ebfa91d80ba"
  }, {
    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/cc890d3f1b15bf6481dc7270fba0b4fbba572813"
  }, {
    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/d2da6696e0c4e60414706e607029d0bb0330c67e"
  } ],
  "database_specific" : {
    "cwe_ids" : [ ],
    "severity" : null,
    "github_reviewed" : false,
    "github_reviewed_at" : null,
    "nvd_published_at" : "2026-10-18T16:17:03Z"
  }
}