CVE-2026-52993: Software Security Vulnerability Vulnerability

CRITICAL
Advisory Identifier: GHSA-m86q-cgj9-94c8
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CVSS 9.8
CWE-415 CWE-763
Published
Advisory Summary

CVE-2026-52993 is a CRITICAL (CVSS 9.8) security vulnerability vulnerability (CWE-415: Double Free) affecting Software libraries in the Maven ecosystem. The weakness occurs when the product calls free() twice on the same memory address.. Remediation is available in the latest vendor maintenance releases.

CVE-2026-52993 at a Glance

CVE Identifier CVE-2026-52993
GHSA Identifier GHSA-m86q-cgj9-94c8
Severity CRITICAL
CVSS v3.1 Base Score 9.8
CWE Classification CWE-415: Double Free
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-2026-52993

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-2026-52993, 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 CWE-415: Double Free, where the product calls free() twice on the same memory address. 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: tipc: fix double-free in tipc_buf_append() tipc_msg_validate() can potentially reallocate the skb it is validating, freeing the old one. In tipc_buf_append(), it was being called with a pointer to a local variable which was a copy of the caller's skb pointer. If the skb was reallocated and validation subsequently failed, the error handling path would free the original skb pointer, which had already been freed, leading to double-free. Fix this by checking if head now points to a newly allocated reassembled skb. If it does, reassign *headbuf for later freeing operations.

References

access.redhat.com/errata/rhsa-2026:47... WEB
https://access.redhat.com/errata/RHSA-2026:47017
NVD — CVE-2026-52993 NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-52993
access.redhat.com/errata/rhsa-2026:45... WEB
https://access.redhat.com/errata/RHSA-2026:45115
access.redhat.com/errata/rhsa-2026:45... WEB
https://access.redhat.com/errata/RHSA-2026:45116
access.redhat.com/errata/rhsa-2026:49... WEB
https://access.redhat.com/errata/RHSA-2026:49212
Software Security Information SECURITY
https://access.redhat.com/security/cve/CVE-2026-52993
bugzilla.redhat.com/show_bug.cgi WEB
https://bugzilla.redhat.com/show_bug.cgi?id=2492437
git.kernel.org/stable/c/0274f24485... WEB
https://git.kernel.org/stable/c/0274f24485fc38032d4093e463dc3ff5c7a667c9
git.kernel.org/stable/c/1d5e589055... WEB
https://git.kernel.org/stable/c/1d5e589055880fae229e229e1929e087dbe08cf3
git.kernel.org/stable/c/29940fff14... WEB
https://git.kernel.org/stable/c/29940fff14110ca48c5ccc168d121665b51bb778
git.kernel.org/stable/c/4d104882bc... WEB
https://git.kernel.org/stable/c/4d104882bc815d4ec666ace9155f5f52715879a6
git.kernel.org/stable/c/4ee4deadaa... WEB
https://git.kernel.org/stable/c/4ee4deadaae7cb2e3d53af0fc889cf92a73413c0
git.kernel.org/stable/c/a438975a6d... WEB
https://git.kernel.org/stable/c/a438975a6dcdbd70865978c021650d1485586f0b
git.kernel.org/stable/c/d293ca716e... WEB
https://git.kernel.org/stable/c/d293ca716e7d5dffdaecaf6b9b2f857a33dc3d3a
git.kernel.org/stable/c/d3556656c6... WEB
https://git.kernel.org/stable/c/d3556656c6daebf8def751c7e71d11dd0a180d24
Software Security Information SECURITY
https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-52993.json

Frequently Asked Questions

What is CVE-2026-52993?
CVE-2026-52993 is a security vulnerability in Software classified as a security vulnerability vulnerability under CWE-415: Double Free.
Which Software versions are affected?
Affected versions include releases prior to current release patches.
What version fixes CVE-2026-52993?
Upgrading to current release patches (or the latest patched release for your respective branch) resolves the vulnerability.
What is the CVSS score of CVE-2026-52993?
CVE-2026-52993 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-2026-52993?
CVE-2026-52993 is classified under CWE-415: Double Free (The product calls free() twice on the same memory address.).
How can I check Maven dependencies for CVE-2026-52993?
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 
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  "id" : "GHSA-m86q-cgj9-94c8",
  "modified" : "2026-08-03T15:32:38Z",
  "published" : "2026-06-24T18:32:43Z",
  "aliases" : [ "CVE-2026-52993" ],
  "details" : "In the Linux kernel, the following vulnerability has been resolved:\n\ntipc: fix double-free in tipc_buf_append()\n\ntipc_msg_validate() can potentially reallocate the skb it is validating,\nfreeing the old one.  In tipc_buf_append(), it was being called with a\npointer to a local variable which was a copy of the caller's skb\npointer.\n\nIf the skb was reallocated and validation subsequently failed, the error\nhandling path would free the original skb pointer, which had already\nbeen freed, leading to double-free.\n\nFix this by checking if head now points to a newly allocated reassembled\nskb.  If it does, reassign *headbuf for later freeing operations.",
  "severity" : [ {
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    "url" : "https://git.kernel.org/stable/c/29940fff14110ca48c5ccc168d121665b51bb778"
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    "url" : "https://git.kernel.org/stable/c/4d104882bc815d4ec666ace9155f5f52715879a6"
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    "url" : "https://git.kernel.org/stable/c/d3556656c6daebf8def751c7e71d11dd0a180d24"
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    "type" : "WEB",
    "url" : "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-52993.json"
  } ],
  "database_specific" : {
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    "github_reviewed" : false,
    "github_reviewed_at" : null,
    "nvd_published_at" : "2026-06-24T17:17:10Z"
  }
}