CVE-2026-72044: Software Security Vulnerability Vulnerability

UNKNOWN
Advisory Identifier: GHSA-wwvc-xj6p-8pqh
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Advisory Summary

CVE-2026-72044 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-2026-72044 at a Glance

CVE Identifier CVE-2026-72044
GHSA Identifier GHSA-wwvc-xj6p-8pqh
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-2026-72044

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-2026-72044, 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: ksmbd: fix stack buffer overflow in multichannel session-key copy Commit 4b706360ffb7 ("ksmbd: fix multichannel binding and enforce channel limit") moved the binding-path session key out of the session-wide sess->sess_key (CIFS_KEY_SIZE = 40) into a new per-channel buffer, and sized both that buffer and the on-stack copy used during binding with SMB2_NTLMV2_SESSKEY_SIZE (16): struct channel { char sess_key[SMB2_NTLMV2_SESSKEY_SIZE]; /* 16 */ ... }; ntlm_authenticate() / krb5_authenticate(): char channel_key[SMB2_NTLMV2_SESSKEY_SIZE] = {}; /* 16 */ char *auth_key = conn->binding ? channel_key : sess->sess_key; The two writers that fill this destination still bound the copy length against CIFS_KEY_SIZE (40), not against the 16-byte buffer: ksmbd_decode_ntlmssp_auth_blob() (NTLM key exchange): if (sess_key_len > CIFS_KEY_SIZE) /* 40 */ return -EINVAL; arc4_crypt(ctx_arc4, sess_key, (char *)authblob + sess_key_off, sess_key_len); ksmbd_krb5_authenticate(): if (resp->session_key_len > sizeof(sess->sess_key)) /* 40 */ ... memcpy(sess_key, resp->payload, resp->session_key_len); On a binding SESSION_SETUP, auth_key points at the 16-byte channel_key, so a client that supplies an NTLM EncryptedRandomSessionKey of up to 40 bytes (with NTLMSSP_NEGOTIATE_KEY_EXCH), or a Kerberos ticket whose session key is longer than 16 bytes (a normal AES256 key is 32), writes past the 16-byte stack buffer -- up to a 24-byte kernel stack overflow. KASAN reports it as a stack-out-of-bounds write in arc4_crypt() called from ksmbd_decode_ntlmssp_auth_blob(). The destinations must be able to hold the full session key the length checks already permit. Size the per-channel key buffer and the two on-stack channel_key buffers with CIFS_KEY_SIZE, matching sess->sess_key.

References

NVD — CVE-2026-72044 NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-72044
git.kernel.org/stable/c/610346149d... WEB
https://git.kernel.org/stable/c/610346149d047a52a92c9a0eb329dd565b8f92c5
git.kernel.org/stable/c/9a7f7b55d7... WEB
https://git.kernel.org/stable/c/9a7f7b55d7d0fbc4662c981ee6c56e081fa66d58

Frequently Asked Questions

What is CVE-2026-72044?
CVE-2026-72044 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-2026-72044?
Upgrading to current release patches (or the latest patched release for your respective branch) resolves the vulnerability.
What CWE is associated with CVE-2026-72044?
CVE-2026-72044 is classified under General Security Weakness.
How can I check Maven dependencies for CVE-2026-72044?
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-wwvc-xj6p-8pqh",
  "modified" : "2026-08-15T06:32:10Z",
  "published" : "2026-08-15T06:32:09Z",
  "aliases" : [ "CVE-2026-72044" ],
  "details" : "In the Linux kernel, the following vulnerability has been resolved:\n\nksmbd: fix stack buffer overflow in multichannel session-key copy\n\nCommit 4b706360ffb7 (\"ksmbd: fix multichannel binding and enforce channel\nlimit\") moved the binding-path session key out of the session-wide\nsess->sess_key (CIFS_KEY_SIZE = 40) into a new per-channel buffer, and\nsized both that buffer and the on-stack copy used during binding with\nSMB2_NTLMV2_SESSKEY_SIZE (16):\n\n\tstruct channel {\n\t\tchar\tsess_key[SMB2_NTLMV2_SESSKEY_SIZE];\t/* 16 */\n\t\t...\n\t};\n\n\tntlm_authenticate() / krb5_authenticate():\n\t\tchar channel_key[SMB2_NTLMV2_SESSKEY_SIZE] = {};\t/* 16 */\n\t\tchar *auth_key = conn->binding ? channel_key : sess->sess_key;\n\nThe two writers that fill this destination still bound the copy length\nagainst CIFS_KEY_SIZE (40), not against the 16-byte buffer:\n\n\tksmbd_decode_ntlmssp_auth_blob() (NTLM key exchange):\n\t\tif (sess_key_len > CIFS_KEY_SIZE)\t/* 40 */\n\t\t\treturn -EINVAL;\n\t\tarc4_crypt(ctx_arc4, sess_key,\n\t\t\t   (char *)authblob + sess_key_off, sess_key_len);\n\n\tksmbd_krb5_authenticate():\n\t\tif (resp->session_key_len > sizeof(sess->sess_key))\t/* 40 */\n\t\t\t...\n\t\tmemcpy(sess_key, resp->payload, resp->session_key_len);\n\nOn a binding SESSION_SETUP, auth_key points at the 16-byte channel_key,\nso a client that supplies an NTLM EncryptedRandomSessionKey of up to 40\nbytes (with NTLMSSP_NEGOTIATE_KEY_EXCH), or a Kerberos ticket whose\nsession key is longer than 16 bytes (a normal AES256 key is 32), writes\npast the 16-byte stack buffer -- up to a 24-byte kernel stack overflow.\nKASAN reports it as a stack-out-of-bounds write in arc4_crypt() called\nfrom ksmbd_decode_ntlmssp_auth_blob().\n\nThe destinations must be able to hold the full session key the length\nchecks already permit. Size the per-channel key buffer and the two\non-stack channel_key buffers with CIFS_KEY_SIZE, matching sess->sess_key.",
  "severity" : [ ],
  "affected" : [ ],
  "references" : [ {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2026-72044"
  }, {
    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/610346149d047a52a92c9a0eb329dd565b8f92c5"
  }, {
    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/9a7f7b55d7d0fbc4662c981ee6c56e081fa66d58"
  } ],
  "database_specific" : {
    "cwe_ids" : [ ],
    "severity" : null,
    "github_reviewed" : false,
    "github_reviewed_at" : null,
    "nvd_published_at" : "2026-08-15T06:21:13Z"
  }
}