CVE-2026-98773: Software Security Vulnerability Vulnerability

UNKNOWN
Advisory Identifier: GHSA-fp39-rj9v-7xc4
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Advisory Summary

CVE-2026-98773 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-2026-98773 at a Glance

CVE Identifier CVE-2026-98773
GHSA Identifier GHSA-fp39-rj9v-7xc4
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-2026-98773

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-2026-98773, 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: USB: cdc-acm: skip URB restart in port_shutdown if disconnected acm_port_shutdown() is called from the tty-port machinery whenever the last user closes the port. acm_disconnect() sets acm->disconnected and calls tty_port_tty_vhangup(), which eventually triggers port_shutdown(). At that point acm_disconnect() has already called acm_poison_urbs() and is about to free the control and read URBs. However, acm_port_shutdown() unconditionally calls acm_unpoison_urbs() and, when the ALWAYS_POLL_CTRL quirk is set, immediately re-submits the ctrlurb and all read URBs. If the concurrent acm_disconnect() then frees those URBs and their DMA buffers while they are in-flight, the result is a use-after-free in acm_ctrl_irq() or acm_read_bulk_callback() accessing the freed DMA memory. Fix by checking acm->disconnected after draining the delayed anchor and returning early: if we are in a disconnect path the URBs must remain poisoned and must not be resubmitted. The early return is placed after the delayed-anchor drain loop because that loop only cancels write-side accounting (wb->use = false and autopm counter) and does not touch the hardware path.

References

NVD — CVE-2026-98773 NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-98773
git.kernel.org/stable/c/420ca35af8... WEB
https://git.kernel.org/stable/c/420ca35af891d33522cc08504768ccd60a4c450a
git.kernel.org/stable/c/9742905d9e... WEB
https://git.kernel.org/stable/c/9742905d9ed5bf23ebe4c100dec80b6bc50fb522
git.kernel.org/stable/c/a0ed07b5bb... WEB
https://git.kernel.org/stable/c/a0ed07b5bbb2d8fcef86810453216070691816e7
git.kernel.org/stable/c/dc614d6bc9... WEB
https://git.kernel.org/stable/c/dc614d6bc991740d41d5a99ac7765c4b675dda88

Frequently Asked Questions

What is CVE-2026-98773?
CVE-2026-98773 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-2026-98773?
Upgrading to current release patches (or the latest patched release for your respective branch) resolves the vulnerability.
What CWE is associated with CVE-2026-98773?
CVE-2026-98773 is classified under General Security Weakness.
How can I check Maven dependencies for CVE-2026-98773?
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-fp39-rj9v-7xc4",
  "modified" : "2026-10-18T18:32:02Z",
  "published" : "2026-10-18T18:32:02Z",
  "aliases" : [ "CVE-2026-98773" ],
  "details" : "In the Linux kernel, the following vulnerability has been resolved:\n\nUSB: cdc-acm: skip URB restart in port_shutdown if disconnected\n\nacm_port_shutdown() is called from the tty-port machinery whenever the\nlast user closes the port.  acm_disconnect() sets acm->disconnected and\ncalls tty_port_tty_vhangup(), which eventually triggers port_shutdown().\nAt that point acm_disconnect() has already called acm_poison_urbs() and\nis about to free the control and read URBs.\n\nHowever, acm_port_shutdown() unconditionally calls acm_unpoison_urbs()\nand, when the ALWAYS_POLL_CTRL quirk is set, immediately re-submits the\nctrlurb and all read URBs.  If the concurrent acm_disconnect() then\nfrees those URBs and their DMA buffers while they are in-flight, the\nresult is a use-after-free in acm_ctrl_irq() or acm_read_bulk_callback()\naccessing the freed DMA memory.\n\nFix by checking acm->disconnected after draining the delayed anchor and\nreturning early: if we are in a disconnect path the URBs must remain\npoisoned and must not be resubmitted.\n\nThe early return is placed after the delayed-anchor drain loop because\nthat loop only cancels write-side accounting (wb->use = false and\nautopm counter) and does not touch the hardware path.",
  "severity" : [ ],
  "affected" : [ ],
  "references" : [ {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2026-98773"
  }, {
    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/420ca35af891d33522cc08504768ccd60a4c450a"
  }, {
    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/9742905d9ed5bf23ebe4c100dec80b6bc50fb522"
  }, {
    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/a0ed07b5bbb2d8fcef86810453216070691816e7"
  }, {
    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/dc614d6bc991740d41d5a99ac7765c4b675dda88"
  } ],
  "database_specific" : {
    "cwe_ids" : [ ],
    "severity" : null,
    "github_reviewed" : false,
    "github_reviewed_at" : null,
    "nvd_published_at" : "2026-10-18T16:17:31Z"
  }
}