CVE-2026-72322: Software Security Vulnerability Vulnerability

CRITICAL
Advisory Identifier: GHSA-p5wq-w75h-848c
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CVSS 9.8
Published
Advisory Summary

CVE-2026-72322 is a CRITICAL (CVSS 9.8) security vulnerability vulnerability (General Security Weakness) affecting Software libraries in the Maven ecosystem. Remediation is available in the latest vendor maintenance releases.

CVE-2026-72322 at a Glance

CVE Identifier CVE-2026-72322
GHSA Identifier GHSA-p5wq-w75h-848c
Severity CRITICAL
CVSS v3.1 Base Score 9.8
CWE Classification General Security Weakness
Affected Product Software
Package Ecosystem Maven
Published Date
Last Updated

Security Impact

CVSS: 9.8

The security impact metrics below are parsed directly from the CVSS v3.1 vector string (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H).

Attack Vector Network (AV:N)
Attack Complexity Low (AC:L)
Privileges Required None (PR:N)
User Interaction None (UI:N)
Scope Unchanged (S:U)
Confidentiality High (C:H)
Integrity High (I:H)
Availability High (A:H)

How to Fix CVE-2026-72322

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-2026-72322, 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: ipv6: mcast: Fix potential UAF in MLD delayed work A race condition exists between device teardown and incoming MLD query processing, leading to a Use-After-Free in the MLD delayed work. During device destruction, the primary reference to inet6_dev is dropped, which can drop its refcount to 0. The actual freeing of inet6_dev memory is deferred via RCU. Concurrently, the packet receive path runs under RCU read lock and obtains the inet6_dev pointer. Because the memory is RCU-protected, CPU-0 can safely dereference inet6_dev even if its refcount has hit 0. However, if CPU-0 calls igmp6_event_query() and schedules delayed work, it attempts to acquire a reference using in6_dev_hold(). This increments the refcount from 0 to 1, triggering a "refcount_t: addition on 0" warning. Since the inet6_dev memory is still scheduled to be freed after the RCU grace period, the device is freed while the work is still scheduled. When the work runs, it accesses the freed memory, causing a kernel panic. Fix this by using refcount_inc_not_zero() (via a new helper in6_dev_hold_safe()) to prevent acquiring a reference if the device is already being destroyed. If the refcount is 0, we do not schedule the work.

References

NVD — CVE-2026-72322 NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-72322
git.kernel.org/stable/c/0401d6cf78... WEB
https://git.kernel.org/stable/c/0401d6cf7877c9be36652385dfcbf7f891b8b590
git.kernel.org/stable/c/0458ba1cda... WEB
https://git.kernel.org/stable/c/0458ba1cda830ba4ccfcd9e19c0891438bcdbe4e
git.kernel.org/stable/c/9815e834f5... WEB
https://git.kernel.org/stable/c/9815e834f5ff8b39e0ea9f0dbd532f4a3b8f0785
git.kernel.org/stable/c/9b26518b68... WEB
https://git.kernel.org/stable/c/9b26518b6896a16b809b1e42986f4ebac7bccc1e
git.kernel.org/stable/c/9ce741c22d... WEB
https://git.kernel.org/stable/c/9ce741c22df4fd9546e30306317ac7df3607e48f
git.kernel.org/stable/c/ebbebf6cee... WEB
https://git.kernel.org/stable/c/ebbebf6cee950d7f1c81990256c0eae9e62572ae
git.kernel.org/stable/c/f03b0a4553... WEB
https://git.kernel.org/stable/c/f03b0a45535d49bdab7e502efaacee205b2a7865
git.kernel.org/stable/c/f12b63ef26... WEB
https://git.kernel.org/stable/c/f12b63ef26a035c5a29b3ef56401e38199010d4a

Frequently Asked Questions

What is CVE-2026-72322?
CVE-2026-72322 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-2026-72322?
Upgrading to current release patches (or the latest patched release for your respective branch) resolves the vulnerability.
What is the CVSS score of CVE-2026-72322?
CVE-2026-72322 has a CVSS v3.1 base score of 9.8 (CRITICAL) with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.
What CWE is associated with CVE-2026-72322?
CVE-2026-72322 is classified under General Security Weakness.
How can I check Maven dependencies for CVE-2026-72322?
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-p5wq-w75h-848c",
  "modified" : "2026-08-17T06:33:23Z",
  "published" : "2026-08-15T06:32:20Z",
  "aliases" : [ "CVE-2026-72322" ],
  "details" : "In the Linux kernel, the following vulnerability has been resolved:\n\nipv6: mcast: Fix potential UAF in MLD delayed work\n\nA race condition exists between device teardown and incoming MLD query\nprocessing, leading to a Use-After-Free in the MLD delayed work.\n\nDuring device destruction, the primary reference to inet6_dev is dropped,\nwhich can drop its refcount to 0. The actual freeing of inet6_dev memory\nis deferred via RCU.\n\nConcurrently, the packet receive path runs under RCU read lock and obtains\nthe inet6_dev pointer. Because the memory is RCU-protected, CPU-0 can\nsafely dereference inet6_dev even if its refcount has hit 0.\n\nHowever, if CPU-0 calls igmp6_event_query() and schedules delayed work, it\nattempts to acquire a reference using in6_dev_hold(). This increments the\nrefcount from 0 to 1, triggering a \"refcount_t: addition on 0\" warning.\nSince the inet6_dev memory is still scheduled to be freed after the RCU\ngrace period, the device is freed while the work is still scheduled.\nWhen the work runs, it accesses the freed memory, causing a kernel panic.\n\nFix this by using refcount_inc_not_zero() (via a new helper\nin6_dev_hold_safe()) to prevent acquiring a reference if the device is\nalready being destroyed. If the refcount is 0, we do not schedule the work.",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H"
  } ],
  "affected" : [ ],
  "references" : [ {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2026-72322"
  }, {
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    "url" : "https://git.kernel.org/stable/c/0401d6cf7877c9be36652385dfcbf7f891b8b590"
  }, {
    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/0458ba1cda830ba4ccfcd9e19c0891438bcdbe4e"
  }, {
    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/9815e834f5ff8b39e0ea9f0dbd532f4a3b8f0785"
  }, {
    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/9b26518b6896a16b809b1e42986f4ebac7bccc1e"
  }, {
    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/9ce741c22df4fd9546e30306317ac7df3607e48f"
  }, {
    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/ebbebf6cee950d7f1c81990256c0eae9e62572ae"
  }, {
    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/f03b0a45535d49bdab7e502efaacee205b2a7865"
  }, {
    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/f12b63ef26a035c5a29b3ef56401e38199010d4a"
  } ],
  "database_specific" : {
    "cwe_ids" : [ ],
    "severity" : "CRITICAL",
    "github_reviewed" : false,
    "github_reviewed_at" : null,
    "nvd_published_at" : "2026-08-15T06:22:05Z"
  }
}