CVE-2026-74270: Software Security Vulnerability Vulnerability

HIGH
Advisory Identifier: GHSA-fc6x-h5h8-wjr3
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CVSS 7.8
Published
Advisory Summary

CVE-2026-74270 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-2026-74270 at a Glance

CVE Identifier CVE-2026-74270
GHSA Identifier GHSA-fc6x-h5h8-wjr3
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-2026-74270

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-2026-74270, 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: handshake: Require admin permission for DONE command ACCEPT and DONE are the two downcalls of the handshake genl family, both intended for use by the trusted handshake agent (tlshd). ACCEPT already requires GENL_ADMIN_PERM; DONE has no privilege check at all. The fd-lookup in handshake_nl_done_doit() only confirms that some pending handshake request exists for the supplied sockfd; it does not authenticate the sender. An unprivileged process that guesses or observes a valid sockfd can therefore submit a DONE with HANDSHAKE_A_DONE_STATUS == 0, leaving the kernel consumer to proceed as if the handshake succeeded. A non-zero status on a forged DONE tears down a legitimate in-flight handshake before tlshd can report its real result.

References

NVD — CVE-2026-74270 NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-74270
git.kernel.org/stable/c/25fb53e43e... WEB
https://git.kernel.org/stable/c/25fb53e43ec006ac69b9e825a7e8a11d63a6083e
git.kernel.org/stable/c/4dafc41194... WEB
https://git.kernel.org/stable/c/4dafc411948469277b276724c3b2b4408c02c04c
git.kernel.org/stable/c/67cec2f1eb... WEB
https://git.kernel.org/stable/c/67cec2f1eb9e58719d622e92e2278ceda72dbd85
git.kernel.org/stable/c/81246a6530... WEB
https://git.kernel.org/stable/c/81246a65303d9635266b1334490142caaf86a11f
git.kernel.org/stable/c/b6557f9125... WEB
https://git.kernel.org/stable/c/b6557f912509abe8e70223373dd7a44d1d4a0d6c

Frequently Asked Questions

What is CVE-2026-74270?
CVE-2026-74270 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-2026-74270?
Upgrading to current release patches (or the latest patched release for your respective branch) resolves the vulnerability.
What is the CVSS score of CVE-2026-74270?
CVE-2026-74270 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-2026-74270?
CVE-2026-74270 is classified under General Security Weakness.
How can I check Maven dependencies for CVE-2026-74270?
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-fc6x-h5h8-wjr3",
  "modified" : "2026-08-17T06:33:35Z",
  "published" : "2026-08-15T06:32:27Z",
  "aliases" : [ "CVE-2026-74270" ],
  "details" : "In the Linux kernel, the following vulnerability has been resolved:\n\nhandshake: Require admin permission for DONE command\n\nACCEPT and DONE are the two downcalls of the handshake genl\nfamily, both intended for use by the trusted handshake agent\n(tlshd). ACCEPT already requires GENL_ADMIN_PERM; DONE has\nno privilege check at all.\n\nThe fd-lookup in handshake_nl_done_doit() only confirms that\nsome pending handshake request exists for the supplied sockfd;\nit does not authenticate the sender. An unprivileged process\nthat guesses or observes a valid sockfd can therefore submit\na DONE with HANDSHAKE_A_DONE_STATUS == 0, leaving the kernel\nconsumer to proceed as if the handshake succeeded. A non-zero\nstatus on a forged DONE tears down a legitimate in-flight\nhandshake before tlshd can report its real result.",
  "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-2026-74270"
  }, {
    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/25fb53e43ec006ac69b9e825a7e8a11d63a6083e"
  }, {
    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/4dafc411948469277b276724c3b2b4408c02c04c"
  }, {
    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/67cec2f1eb9e58719d622e92e2278ceda72dbd85"
  }, {
    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/81246a65303d9635266b1334490142caaf86a11f"
  }, {
    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/b6557f912509abe8e70223373dd7a44d1d4a0d6c"
  } ],
  "database_specific" : {
    "cwe_ids" : [ ],
    "severity" : "HIGH",
    "github_reviewed" : false,
    "github_reviewed_at" : null,
    "nvd_published_at" : "2026-08-15T06:22:26Z"
  }
}