CVE-2026-90189: Software Security Vulnerability Vulnerability

UNKNOWN
Advisory Identifier: GHSA-p7q5-vj3m-rc98
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Advisory Summary

CVE-2026-90189 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-2026-90189 at a Glance

CVE Identifier CVE-2026-90189
GHSA Identifier GHSA-p7q5-vj3m-rc98
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-2026-90189

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-2026-90189, 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: null_blk: register configfs subsystem after creating default devices In null_init(), configfs_register_subsystem() currently runs before register_blkdev(), so when null_blk is built as a module, a racing mkdir() + poweron from userspace can reach null_add_dev() while null_major is still 0. __add_disk() then hits WARN_ON(disk->minors) (major=0 with minors!=0) and fails: [root@fedora ~]# [ 2366.521436] WARNING: block/genhd.c:476 at __add_disk+0x8a7/0xde0, [ 2366.523552] Modules linked in: null_blk(+) nft_fib_inet nft_fib_ipv4 nft_fib_ipv6 nft_fib [ 2366.529081] CPU: 26 UID: 0 PID: 1600 Comm: sh Not tainted 7.2.0-rc1+ #66 PREEMPT(full) ...... [ 2366.547251] Call Trace: [ 2366.547575] <TASK> [ 2366.547831] ? _raw_spin_lock+0x84/0xe0 [ 2366.548260] add_disk_fwnode+0x114/0x560 [ 2366.548739] null_add_dev+0x102d/0x1b80 [null_blk] [ 2366.549310] ? __pfx_null_add_dev+0x10/0x10 [null_blk] [ 2366.549906] ? mutex_lock+0xde/0x1c0 [ 2366.550361] ? __pfx_mutex_lock+0x10/0x10 [ 2366.550827] nullb_device_power_store+0x1e7/0x280 [null_blk] [ 2366.551499] ? __pfx_nullb_device_power_store+0x10/0x10 [null_blk] [ 2366.552177] ? __kmalloc_cache_noprof+0x1f5/0x470 [ 2366.552748] ? configfs_write_iter+0x35c/0x4e0 [ 2366.553242] configfs_write_iter+0x286/0x4e0 [ 2366.553787] vfs_write+0x52d/0xd00 [ 2366.554169] ? __pfx_vfs_write+0x10/0x10 [ 2366.554679] ? __pfx___css_rstat_updated+0x10/0x10 [ 2366.555196] ? fdget_pos+0x1cf/0x4c0 [ 2366.555649] ksys_write+0xfc/0x1d0 ...... Additionally, the err_dev path destroys all devices on nullb_list while configfs is still registered. If a racing mkdir() + poweron puts a user device on the list, null_destroy_dev()->null_free_dev() kfrees the user device's nullb_device but /sys/kernel/config/nullb/<name> is still reachable. Any userspace access to the item will trigger a UAF. For simplicity, move configfs_register_subsystem() to the end to solve the problems above.

References

NVD — CVE-2026-90189 NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-90189
git.kernel.org/stable/c/2679b11e92... WEB
https://git.kernel.org/stable/c/2679b11e9256bd70a5ef41783bab6ad6c34a3db1
git.kernel.org/stable/c/57debc907a... WEB
https://git.kernel.org/stable/c/57debc907aef66319d244009d3370dcd97388d37
git.kernel.org/stable/c/c9d293d6bb... WEB
https://git.kernel.org/stable/c/c9d293d6bb0575fcb1f3408129453187e2a28a4e
git.kernel.org/stable/c/cab9bf5f68... WEB
https://git.kernel.org/stable/c/cab9bf5f68f76cd44e0ec92bd4a60c9b83656a36
git.kernel.org/stable/c/d761be1b8f... WEB
https://git.kernel.org/stable/c/d761be1b8f2bbabc41252deb79a426d3f0d4fa10
git.kernel.org/stable/c/dbcedbe481... WEB
https://git.kernel.org/stable/c/dbcedbe4819ae21274ea77469e61e46a878b9943

Frequently Asked Questions

What is CVE-2026-90189?
CVE-2026-90189 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-2026-90189?
Upgrading to current release patches (or the latest patched release for your respective branch) resolves the vulnerability.
What CWE is associated with CVE-2026-90189?
CVE-2026-90189 is classified under General Security Weakness.
How can I check Maven dependencies for CVE-2026-90189?
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-p7q5-vj3m-rc98",
  "modified" : "2026-09-17T18:31:55Z",
  "published" : "2026-09-17T18:31:54Z",
  "aliases" : [ "CVE-2026-90189" ],
  "details" : "In the Linux kernel, the following vulnerability has been resolved:\n\nnull_blk: register configfs subsystem after creating default devices\n\nIn null_init(), configfs_register_subsystem() currently runs before\nregister_blkdev(), so when null_blk is built as a module, a racing mkdir()\n+ poweron from userspace can reach null_add_dev() while null_major is still\n0. __add_disk() then hits WARN_ON(disk->minors) (major=0 with minors!=0)\nand fails:\n\n[root@fedora ~]# [ 2366.521436] WARNING: block/genhd.c:476 at __add_disk+0x8a7/0xde0,\n[ 2366.523552] Modules linked in: null_blk(+) nft_fib_inet nft_fib_ipv4 nft_fib_ipv6 nft_fib\n[ 2366.529081] CPU: 26 UID: 0 PID: 1600 Comm: sh Not tainted 7.2.0-rc1+ #66 PREEMPT(full)\n......\n[ 2366.547251] Call Trace:\n[ 2366.547575]  <TASK>\n[ 2366.547831]  ? _raw_spin_lock+0x84/0xe0\n[ 2366.548260]  add_disk_fwnode+0x114/0x560\n[ 2366.548739]  null_add_dev+0x102d/0x1b80 [null_blk]\n[ 2366.549310]  ? __pfx_null_add_dev+0x10/0x10 [null_blk]\n[ 2366.549906]  ? mutex_lock+0xde/0x1c0\n[ 2366.550361]  ? __pfx_mutex_lock+0x10/0x10\n[ 2366.550827]  nullb_device_power_store+0x1e7/0x280 [null_blk]\n[ 2366.551499]  ? __pfx_nullb_device_power_store+0x10/0x10 [null_blk]\n[ 2366.552177]  ? __kmalloc_cache_noprof+0x1f5/0x470\n[ 2366.552748]  ? configfs_write_iter+0x35c/0x4e0\n[ 2366.553242]  configfs_write_iter+0x286/0x4e0\n[ 2366.553787]  vfs_write+0x52d/0xd00\n[ 2366.554169]  ? __pfx_vfs_write+0x10/0x10\n[ 2366.554679]  ? __pfx___css_rstat_updated+0x10/0x10\n[ 2366.555196]  ? fdget_pos+0x1cf/0x4c0\n[ 2366.555649]  ksys_write+0xfc/0x1d0\n......\n\nAdditionally, the err_dev path destroys all devices on nullb_list while\nconfigfs is still registered. If a racing mkdir() + poweron puts a user\ndevice on the list, null_destroy_dev()->null_free_dev() kfrees the user\ndevice's nullb_device but /sys/kernel/config/nullb/<name> is still\nreachable. Any userspace access to the item will trigger a UAF.\n\nFor simplicity, move configfs_register_subsystem() to the end to solve\nthe problems above.",
  "severity" : [ ],
  "affected" : [ ],
  "references" : [ {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2026-90189"
  }, {
    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/2679b11e9256bd70a5ef41783bab6ad6c34a3db1"
  }, {
    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/57debc907aef66319d244009d3370dcd97388d37"
  }, {
    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/c9d293d6bb0575fcb1f3408129453187e2a28a4e"
  }, {
    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/cab9bf5f68f76cd44e0ec92bd4a60c9b83656a36"
  }, {
    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/d761be1b8f2bbabc41252deb79a426d3f0d4fa10"
  }, {
    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/dbcedbe4819ae21274ea77469e61e46a878b9943"
  } ],
  "database_specific" : {
    "cwe_ids" : [ ],
    "severity" : null,
    "github_reviewed" : false,
    "github_reviewed_at" : null,
    "nvd_published_at" : "2026-09-17T17:17:13Z"
  }
}