CVE-2026-74284: Software Security Vulnerability Vulnerability

UNKNOWN
Advisory Identifier: GHSA-mfhv-3jvw-9w4g
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Advisory Summary

CVE-2026-74284 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-2026-74284 at a Glance

CVE Identifier CVE-2026-74284
GHSA Identifier GHSA-mfhv-3jvw-9w4g
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-2026-74284

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-2026-74284, 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: net/sched: sch_hfsc: Don't make class passive twice update_vf() is called from two places for the same class during a single dequeue when the class's child qdisc (e.g. codel/fq_codel) drops its last packets while dequeuing: 1. The child calls qdisc_tree_reduce_backlog(), which, now that the child is empty, invokes hfsc_qlen_notify() -> update_vf(cl, 0, 0) and turns the class passive (cl_nactive is decremented up the hierarchy). 2. hfsc_dequeue() then calls update_vf(cl, qdisc_pkt_len(skb), cur_time) to charge the dequeued bytes. On the second call the class is already passive, but its child qdisc is still empty, so update_vf() arms go_passive again: if (cl->qdisc->q.qlen == 0 && cl->cl_flags & HFSC_FSC) go_passive = 1; The leaf is then skipped by the cl_nactive == 0 check inside the loop, which does not clear go_passive, so the stale go_passive propagates to the parent and decrements its cl_nactive a second time. A parent that still has other active children is driven to cl_nactive == 0 and removed from the vttree, even though those siblings are still backlogged. They are never dequeued again and the qdisc stalls. Fix this by only arming go_passive when the class is actually active, so an already-passive class no longer triggers a second passive transition. The byte accounting (cl->cl_total += len) still runs for every ancestor, so dequeued bytes continue to be counted exactly once.

References

NVD — CVE-2026-74284 NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-74284
git.kernel.org/stable/c/15720cd8fa... WEB
https://git.kernel.org/stable/c/15720cd8fa3fc625146128f89a8e11b0449a20a7
git.kernel.org/stable/c/3a49bbae67... WEB
https://git.kernel.org/stable/c/3a49bbae676fef1ffe548971e6229ae2adeb9d10
git.kernel.org/stable/c/66dbb13eeb... WEB
https://git.kernel.org/stable/c/66dbb13eeb2fc339f8f548a9076be4c1a94857b0
git.kernel.org/stable/c/90b662ea25... WEB
https://git.kernel.org/stable/c/90b662ea25f5e83bb3b8ccec5b93ced810b92fb8
git.kernel.org/stable/c/9221a594c7... WEB
https://git.kernel.org/stable/c/9221a594c72a1446137926d4c2aa04e345f798dc
git.kernel.org/stable/c/a425c82ff0... WEB
https://git.kernel.org/stable/c/a425c82ff06cda5165e0de3de8c2a445ec1f863e
git.kernel.org/stable/c/b2a017bfcf... WEB
https://git.kernel.org/stable/c/b2a017bfcf565721918ec7355a373911d2f2a227
git.kernel.org/stable/c/fc973ecd1a... WEB
https://git.kernel.org/stable/c/fc973ecd1a079b9a87c360478542f3a56dea085b

Frequently Asked Questions

What is CVE-2026-74284?
CVE-2026-74284 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-2026-74284?
Upgrading to current release patches (or the latest patched release for your respective branch) resolves the vulnerability.
What CWE is associated with CVE-2026-74284?
CVE-2026-74284 is classified under General Security Weakness.
How can I check Maven dependencies for CVE-2026-74284?
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-mfhv-3jvw-9w4g",
  "modified" : "2026-08-15T06:32:28Z",
  "published" : "2026-08-15T06:32:28Z",
  "aliases" : [ "CVE-2026-74284" ],
  "details" : "In the Linux kernel, the following vulnerability has been resolved:\n\nnet/sched: sch_hfsc: Don't make class passive twice\n\nupdate_vf() is called from two places for the same class during a single\ndequeue when the class's child qdisc (e.g. codel/fq_codel) drops its last\npackets while dequeuing:\n\n1. The child calls qdisc_tree_reduce_backlog(), which, now that the child\n   is empty, invokes hfsc_qlen_notify() -> update_vf(cl, 0, 0) and turns\n   the class passive (cl_nactive is decremented up the hierarchy).\n\n2. hfsc_dequeue() then calls update_vf(cl, qdisc_pkt_len(skb), cur_time)\n   to charge the dequeued bytes.\n\nOn the second call the class is already passive, but its child qdisc is\nstill empty, so update_vf() arms go_passive again:\n\n      if (cl->qdisc->q.qlen == 0 && cl->cl_flags & HFSC_FSC)\n              go_passive = 1;\n\nThe leaf is then skipped by the cl_nactive == 0 check inside the loop,\nwhich does not clear go_passive, so the stale go_passive propagates to the\nparent and decrements its cl_nactive a second time. A parent that still\nhas other active children is driven to cl_nactive == 0 and removed from\nthe vttree, even though those siblings are still backlogged. They are\nnever dequeued again and the qdisc stalls.\n\nFix this by only arming go_passive when the class is actually active, so an\nalready-passive class no longer triggers a second passive transition. The\nbyte accounting (cl->cl_total += len) still runs for every ancestor, so\ndequeued bytes continue to be counted exactly once.",
  "severity" : [ ],
  "affected" : [ ],
  "references" : [ {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2026-74284"
  }, {
    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/15720cd8fa3fc625146128f89a8e11b0449a20a7"
  }, {
    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/3a49bbae676fef1ffe548971e6229ae2adeb9d10"
  }, {
    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/66dbb13eeb2fc339f8f548a9076be4c1a94857b0"
  }, {
    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/90b662ea25f5e83bb3b8ccec5b93ced810b92fb8"
  }, {
    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/9221a594c72a1446137926d4c2aa04e345f798dc"
  }, {
    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/a425c82ff06cda5165e0de3de8c2a445ec1f863e"
  }, {
    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/b2a017bfcf565721918ec7355a373911d2f2a227"
  }, {
    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/fc973ecd1a079b9a87c360478542f3a56dea085b"
  } ],
  "database_specific" : {
    "cwe_ids" : [ ],
    "severity" : null,
    "github_reviewed" : false,
    "github_reviewed_at" : null,
    "nvd_published_at" : "2026-08-15T06:22:27Z"
  }
}