CVE-2026-89969: Software Security Vulnerability Vulnerability

CRITICAL
Advisory Identifier: GHSA-pcvm-4g32-rvg7
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CVSS 9.8
Published
Advisory Summary

CVE-2026-89969 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-2026-89969 at a Glance

CVE Identifier CVE-2026-89969
GHSA Identifier GHSA-pcvm-4g32-rvg7
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-2026-89969

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-2026-89969, 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: nvmet-tcp: fix out-of-bounds write when receiving an over-long PDU nvmet_tcp_try_recv_pdu() reads a PDU header into the fixed 128-byte queue->pdu union, then computes the remaining payload length as queue->left = hdr->hlen - queue->offset + hdgst; and reads that many more bytes into &queue->pdu + queue->offset, without ever bounding the result against sizeof(queue->pdu). A struct nvme_tcp_icreq_pdu is itself 128 bytes, exactly the size of the union. Once a header digest has been negotiated (hdgst = 4), a second ICReq passes the hlen == nvmet_tcp_pdu_size() check but yields queue->left = 128 - 8 + 4 = 124, so bytes 8..132 are written into the 128-byte buffer -- 4 bytes past its end, over queue->hdr_digest and queue->data_digest. Those bytes are attacker-controlled (an ICReq carries no digest), and the duplicate ICReq is only rejected later, after the overflow. A remote unauthenticated host can thus corrupt kernel memory adjacent to the receive buffer. Reject any PDU whose declared length would read past the end of queue->pdu before the second recv.

References

NVD — CVE-2026-89969 NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-89969
git.kernel.org/stable/c/14cc5a7e77... WEB
https://git.kernel.org/stable/c/14cc5a7e77731497d5bea70f3bb05df7eda982e4
git.kernel.org/stable/c/3a385e0c39... WEB
https://git.kernel.org/stable/c/3a385e0c39efbe34db8edd95900c123113ae3450
git.kernel.org/stable/c/4f84d42c53... WEB
https://git.kernel.org/stable/c/4f84d42c53c49557fb1ef285c683b0a81b576c74
git.kernel.org/stable/c/58dc6035b7... WEB
https://git.kernel.org/stable/c/58dc6035b79c4c73c0cbf9ec9f68a7f117b2b3e6
git.kernel.org/stable/c/a3f0bcfbaf... WEB
https://git.kernel.org/stable/c/a3f0bcfbaf3312a5754d1ce020a07d394669eb25
git.kernel.org/stable/c/cf5f39d2b5... WEB
https://git.kernel.org/stable/c/cf5f39d2b58f97e0cd1829c4a6aeef17f1607cca
git.kernel.org/stable/c/d95d342bc0... WEB
https://git.kernel.org/stable/c/d95d342bc0ea82dc79e6362b2f1f997431750e4c
git.kernel.org/stable/c/dbc4acbdb3... WEB
https://git.kernel.org/stable/c/dbc4acbdb3ca8c81441368ad7409b8f77d4de8f6

Frequently Asked Questions

What is CVE-2026-89969?
CVE-2026-89969 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-2026-89969?
Upgrading to current release patches (or the latest patched release for your respective branch) resolves the vulnerability.
What is the CVSS score of CVE-2026-89969?
CVE-2026-89969 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-2026-89969?
CVE-2026-89969 is classified under General Security Weakness.
How can I check Maven dependencies for CVE-2026-89969?
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-pcvm-4g32-rvg7",
  "modified" : "2026-09-16T15:31:03Z",
  "published" : "2026-09-16T12:30:44Z",
  "aliases" : [ "CVE-2026-89969" ],
  "details" : "In the Linux kernel, the following vulnerability has been resolved:\n\nnvmet-tcp: fix out-of-bounds write when receiving an over-long PDU\n\nnvmet_tcp_try_recv_pdu() reads a PDU header into the fixed 128-byte\nqueue->pdu union, then computes the remaining payload length as\n\n\tqueue->left = hdr->hlen - queue->offset + hdgst;\n\nand reads that many more bytes into &queue->pdu + queue->offset, without\never bounding the result against sizeof(queue->pdu).\n\nA struct nvme_tcp_icreq_pdu is itself 128 bytes, exactly the size of the\nunion. Once a header digest has been negotiated (hdgst = 4), a second\nICReq passes the hlen == nvmet_tcp_pdu_size() check but yields\nqueue->left = 128 - 8 + 4 = 124, so bytes 8..132 are written into the\n128-byte buffer -- 4 bytes past its end, over queue->hdr_digest and\nqueue->data_digest. Those bytes are attacker-controlled (an ICReq\ncarries no digest), and the duplicate ICReq is only rejected later,\nafter the overflow. A remote unauthenticated host can thus corrupt\nkernel memory adjacent to the receive buffer.\n\nReject any PDU whose declared length would read past the end of\nqueue->pdu before the second recv.",
  "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-2026-89969"
  }, {
    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/14cc5a7e77731497d5bea70f3bb05df7eda982e4"
  }, {
    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/3a385e0c39efbe34db8edd95900c123113ae3450"
  }, {
    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/4f84d42c53c49557fb1ef285c683b0a81b576c74"
  }, {
    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/58dc6035b79c4c73c0cbf9ec9f68a7f117b2b3e6"
  }, {
    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/a3f0bcfbaf3312a5754d1ce020a07d394669eb25"
  }, {
    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/cf5f39d2b58f97e0cd1829c4a6aeef17f1607cca"
  }, {
    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/d95d342bc0ea82dc79e6362b2f1f997431750e4c"
  }, {
    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/dbc4acbdb3ca8c81441368ad7409b8f77d4de8f6"
  } ],
  "database_specific" : {
    "cwe_ids" : [ ],
    "severity" : "CRITICAL",
    "github_reviewed" : false,
    "github_reviewed_at" : null,
    "nvd_published_at" : "2026-09-16T11:17:07Z"
  }
}