CVE-2026-89488: Software Security Vulnerability Vulnerability

HIGH
Advisory Identifier: GHSA-vv57-w433-jw5h
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CVSS 7.8
Published
Advisory Summary

CVE-2026-89488 is a HIGH (CVSS 7.8) security vulnerability vulnerability (General Security Weakness) affecting Software libraries in the Maven ecosystem. Remediation is available in the latest vendor maintenance releases.

CVE-2026-89488 at a Glance

CVE Identifier CVE-2026-89488
GHSA Identifier GHSA-vv57-w433-jw5h
Severity HIGH
CVSS v3.1 Base Score 7.8
CWE Classification General Security Weakness
Affected Product Software
Package Ecosystem Maven
Published Date
Last Updated

Security Impact

CVSS: 7.8

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

Attack Vector Local (AV:L)
Attack Complexity Low (AC:L)
Privileges Required Low (PR:L)
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-2026-89488

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-2026-89488, 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: openvswitch: Fix CT limit teardown use-after-free Packet processing uses CT limit state under RCU, while netns teardown frees that state under ovs_mutex. The CT limit pointer was neither removed from readers nor protected by a grace period, allowing packet processing to dereference the freed state. An unprivileged user can trigger this bug from a user and network namespace, causing a slab-use-after-free in ovs_ct_execute() when the netns is torn down. Publish the CT limit pointer through RCU, remove it before teardown, and wait for readers before freeing its contents. Keep ovs_mutex around individual CT limit updates, and use the RCU read-side lock while GET traverses the RCU-protected limit lists. Netns teardown detaches the RCU-protected CT limit state in the pernet .pre_exit callback while holding ovs_mutex. The pernet core guarantees an RCU grace period between the .pre_exit and .exit callbacks, so the .exit callback completes the teardown without adding any extra synchronization. The netlink command handlers do not need NULL checks because the userspace netlink socket holds an active reference to its network namespace while a request is processed. The per-netns exit path therefore cannot run concurrently with SET, DEL, or GET for that socket's namespace.

References

NVD — CVE-2026-89488 NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-89488
git.kernel.org/stable/c/239f26589a... WEB
https://git.kernel.org/stable/c/239f26589a6926db28c436e14f28517581ef1385
git.kernel.org/stable/c/3b41d90740... WEB
https://git.kernel.org/stable/c/3b41d907400cc1dd1da9555b81dca422b1f44433
git.kernel.org/stable/c/3b9369881b... WEB
https://git.kernel.org/stable/c/3b9369881b403f4cdbb11fa998554382bdcc3d8c
git.kernel.org/stable/c/403f96c32c... WEB
https://git.kernel.org/stable/c/403f96c32c9e24600093d7d0c61c17daeedca957
git.kernel.org/stable/c/680f20d593... WEB
https://git.kernel.org/stable/c/680f20d5937fa4d1367c59fe83091b78041015f5
git.kernel.org/stable/c/6a6d36fadb... WEB
https://git.kernel.org/stable/c/6a6d36fadb8537d9b79e72c9fa51885ec0c33e10
git.kernel.org/stable/c/bf4aaa7ea2... WEB
https://git.kernel.org/stable/c/bf4aaa7ea2579e24ed7de2e20578a875bebca011
git.kernel.org/stable/c/e15407c3a8... WEB
https://git.kernel.org/stable/c/e15407c3a8a005324f633cd46cd8fb58042c1157

Frequently Asked Questions

What is CVE-2026-89488?
CVE-2026-89488 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-2026-89488?
Upgrading to current release patches (or the latest patched release for your respective branch) resolves the vulnerability.
What is the CVSS score of CVE-2026-89488?
CVE-2026-89488 has a CVSS v3.1 base score of 7.8 (HIGH) with vector string CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.
What CWE is associated with CVE-2026-89488?
CVE-2026-89488 is classified under General Security Weakness.
How can I check Maven dependencies for CVE-2026-89488?
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-vv57-w433-jw5h",
  "modified" : "2026-09-14T15:32:26Z",
  "published" : "2026-09-11T21:31:28Z",
  "aliases" : [ "CVE-2026-89488" ],
  "details" : "In the Linux kernel, the following vulnerability has been resolved:\n\nopenvswitch: Fix CT limit teardown use-after-free\n\nPacket processing uses CT limit state under RCU, while netns teardown\nfrees that state under ovs_mutex. The CT limit pointer was neither removed\nfrom readers nor protected by a grace period, allowing packet processing to\ndereference the freed state.\n\nAn unprivileged user can trigger this bug from a user and network\nnamespace, causing a slab-use-after-free in ovs_ct_execute() when the\nnetns is torn down.\n\nPublish the CT limit pointer through RCU, remove it before teardown, and\nwait for readers before freeing its contents. Keep ovs_mutex around\nindividual CT limit updates, and use the RCU read-side lock while GET\ntraverses the RCU-protected limit lists.\n\nNetns teardown detaches the RCU-protected CT limit state in the pernet\n.pre_exit callback while holding ovs_mutex.  The pernet core guarantees an\nRCU grace period between the .pre_exit and .exit callbacks, so the .exit\ncallback completes the teardown without adding any extra synchronization.\n\nThe netlink command handlers do not need NULL checks because the userspace\nnetlink socket holds an active reference to its network namespace while a\nrequest is processed. The per-netns exit path therefore cannot run\nconcurrently with SET, DEL, or GET for that socket's namespace.",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H"
  } ],
  "affected" : [ ],
  "references" : [ {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2026-89488"
  }, {
    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/239f26589a6926db28c436e14f28517581ef1385"
  }, {
    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/3b41d907400cc1dd1da9555b81dca422b1f44433"
  }, {
    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/3b9369881b403f4cdbb11fa998554382bdcc3d8c"
  }, {
    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/403f96c32c9e24600093d7d0c61c17daeedca957"
  }, {
    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/680f20d5937fa4d1367c59fe83091b78041015f5"
  }, {
    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/6a6d36fadb8537d9b79e72c9fa51885ec0c33e10"
  }, {
    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/bf4aaa7ea2579e24ed7de2e20578a875bebca011"
  }, {
    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/e15407c3a8a005324f633cd46cd8fb58042c1157"
  } ],
  "database_specific" : {
    "cwe_ids" : [ ],
    "severity" : "HIGH",
    "github_reviewed" : false,
    "github_reviewed_at" : null,
    "nvd_published_at" : "2026-09-11T20:19:30Z"
  }
}