CVE-2026-98841: Software Security Vulnerability Vulnerability

UNKNOWN
Advisory Identifier: GHSA-p8pc-3hw3-fwp9
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Advisory Summary

CVE-2026-98841 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-2026-98841 at a Glance

CVE Identifier CVE-2026-98841
GHSA Identifier GHSA-p8pc-3hw3-fwp9
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-2026-98841

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-2026-98841, 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: virt: vmgenid: set driver_data before registering notification handlers Both probe paths register their notification handler before assigning driver_data, which the handler dereferences. In the devicetree path, the notification IRQ can fire as soon as devm_request_irq() registers the handler: the interrupt may already be pending at probe time, for example when a VMM injects the generation-changed notification while restoring a guest from a snapshot that was taken before the driver had probed (Firecracker does exactly this on snapshot restore). The IRQ is also requested with IRQF_SHARED, so another device sharing the line can trigger the handler just as early. The handler then calls vmgenid_notify(), which dereferences the still-NULL driver_data and panics: Unable to handle kernel NULL pointer dereference at virtual address 0000000000000010 CPU: 0 UID: 0 PID: 1 Comm: swapper/0 Not tainted 6.18.38+ #1 PREEMPT(none) Hardware name: linux,dummy-virt (DT) pc : vmgenid_notify.isra.0+0x24/0x8c lr : vmgenid_of_irq_handler+0x14/0x34 Call trace: vmgenid_notify.isra.0+0x24/0x8c (P) vmgenid_of_irq_handler+0x14/0x34 __handle_irq_event_percpu+0x44/0x1bc handle_irq_event+0x4c/0xb4 handle_fasteoi_irq+0xf8/0x1f8 The ACPI path has the same ordering problem: the handler is installed with acpi_install_notify_handler() before driver_data is assigned. ACPI notifications are dispatched asynchronously from a workqueue, so the window is narrow, but a notification arriving between the two calls hits the same NULL dereference. Assign driver_data before registering the handlers. The state is fully initialized at that point, so the handlers are safe to run. Should registration fail, the probe error path leaves no dangling pointer behind: the driver core clears driver_data in device_unbind_cleanup().

References

NVD — CVE-2026-98841 NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-98841
git.kernel.org/stable/c/538fe5efaa... WEB
https://git.kernel.org/stable/c/538fe5efaa9704ad820ba34b4f9df135ca873d79
git.kernel.org/stable/c/7a1e8daeaa... WEB
https://git.kernel.org/stable/c/7a1e8daeaa466c6aaffa223e1afe9cfeece0dd47
git.kernel.org/stable/c/8f42954ad8... WEB
https://git.kernel.org/stable/c/8f42954ad8bf9bdbf574f2c437ad30cb2601f401
git.kernel.org/stable/c/9f8139c614... WEB
https://git.kernel.org/stable/c/9f8139c6145cf17d690d6c414d43b4c0bef632fb

Frequently Asked Questions

What is CVE-2026-98841?
CVE-2026-98841 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-2026-98841?
Upgrading to current release patches (or the latest patched release for your respective branch) resolves the vulnerability.
What CWE is associated with CVE-2026-98841?
CVE-2026-98841 is classified under General Security Weakness.
How can I check Maven dependencies for CVE-2026-98841?
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-p8pc-3hw3-fwp9",
  "modified" : "2026-10-18T18:32:05Z",
  "published" : "2026-10-18T18:32:05Z",
  "aliases" : [ "CVE-2026-98841" ],
  "details" : "In the Linux kernel, the following vulnerability has been resolved:\n\nvirt: vmgenid: set driver_data before registering notification handlers\n\nBoth probe paths register their notification handler before assigning\ndriver_data, which the handler dereferences.\n\nIn the devicetree path, the notification IRQ can fire as soon as\ndevm_request_irq() registers the handler: the interrupt may already be\npending at probe time, for example when a VMM injects the\ngeneration-changed notification while restoring a guest from a snapshot\nthat was taken before the driver had probed (Firecracker does exactly\nthis on snapshot restore). The IRQ is also requested with IRQF_SHARED,\nso another device sharing the line can trigger the handler just as\nearly. The handler then calls vmgenid_notify(), which dereferences the\nstill-NULL driver_data and panics:\n\n  Unable to handle kernel NULL pointer dereference at virtual address 0000000000000010\n  CPU: 0 UID: 0 PID: 1 Comm: swapper/0 Not tainted 6.18.38+ #1 PREEMPT(none)\n  Hardware name: linux,dummy-virt (DT)\n  pc : vmgenid_notify.isra.0+0x24/0x8c\n  lr : vmgenid_of_irq_handler+0x14/0x34\n  Call trace:\n   vmgenid_notify.isra.0+0x24/0x8c (P)\n   vmgenid_of_irq_handler+0x14/0x34\n   __handle_irq_event_percpu+0x44/0x1bc\n   handle_irq_event+0x4c/0xb4\n   handle_fasteoi_irq+0xf8/0x1f8\n\nThe ACPI path has the same ordering problem: the handler is installed\nwith acpi_install_notify_handler() before driver_data is assigned.\nACPI notifications are dispatched asynchronously from a workqueue, so\nthe window is narrow, but a notification arriving between the two calls\nhits the same NULL dereference.\n\nAssign driver_data before registering the handlers. The state is fully\ninitialized at that point, so the handlers are safe to run. Should\nregistration fail, the probe error path leaves no dangling pointer\nbehind: the driver core clears driver_data in device_unbind_cleanup().",
  "severity" : [ ],
  "affected" : [ ],
  "references" : [ {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2026-98841"
  }, {
    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/538fe5efaa9704ad820ba34b4f9df135ca873d79"
  }, {
    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/7a1e8daeaa466c6aaffa223e1afe9cfeece0dd47"
  }, {
    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/8f42954ad8bf9bdbf574f2c437ad30cb2601f401"
  }, {
    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/9f8139c6145cf17d690d6c414d43b4c0bef632fb"
  } ],
  "database_specific" : {
    "cwe_ids" : [ ],
    "severity" : null,
    "github_reviewed" : false,
    "github_reviewed_at" : null,
    "nvd_published_at" : "2026-10-18T16:17:38Z"
  }
}