CVE-2026-74587: Software Security Vulnerability Vulnerability

CRITICAL
Advisory Identifier: GHSA-5vmc-fx99-r54r
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CVSS 9.8
Published
Advisory Summary

CVE-2026-74587 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-2026-74587 at a Glance

CVE Identifier CVE-2026-74587
GHSA Identifier GHSA-5vmc-fx99-r54r
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-2026-74587

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-2026-74587, 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: sctp: fix use-after-free of cached ASCONF chunk addip_last_asconf caches the outstanding outbound ASCONF chunk. The normal ASCONF-ACK completion path releases the chunk and clears the pointer. However, sctp_asconf_queue_teardown() releases the cached chunk without clearing addip_last_asconf. During peer restart handling, sctp_sf_do_dupcook_a() queues SCTP_CMD_PURGE_ASCONF_QUEUE, which invokes sctp_asconf_queue_teardown() while the association remains alive and leaves the pointer dangling. A delayed authenticated ASCONF-ACK can then reach sctp_sf_do_asconf_ack(), which accesses the stale chunk and passes it to sctp_process_asconf_ack(), causing a use-after-free and a second release. Clearing the pointer exposes a race with T4 expiry. Peer restart handling queues the timer stop before the purge, but SCTP_CMD_TIMER_STOP uses timer_delete(), which does not wait for a callback already running on another CPU. Such a callback can reach sctp_sf_t4_timer_expire() after the purge and dereference NULL. Clear addip_last_asconf after releasing the cached chunk, and make sctp_sf_t4_timer_expire() consume a stale T4 expiry if no outstanding ASCONF remains.

References

NVD — CVE-2026-74587 NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-74587
git.kernel.org/stable/c/07daf4f975... WEB
https://git.kernel.org/stable/c/07daf4f9750104960a1d60831b2353c0d41f35fb
git.kernel.org/stable/c/10459b03e2... WEB
https://git.kernel.org/stable/c/10459b03e2d9ee12435e96f587de4d4cacdbf435
git.kernel.org/stable/c/179676f016... WEB
https://git.kernel.org/stable/c/179676f0166230c80053a392303485b37c93dd33
git.kernel.org/stable/c/618b5c6d04... WEB
https://git.kernel.org/stable/c/618b5c6d049896fcfabb91afc072954c92cb2693
git.kernel.org/stable/c/8c283e7b56... WEB
https://git.kernel.org/stable/c/8c283e7b56adce00193837f3311b06662466fb21
git.kernel.org/stable/c/d949992bc3... WEB
https://git.kernel.org/stable/c/d949992bc3f00027a2c755e860a11950c75f6073
git.kernel.org/stable/c/dc67d528c2... WEB
https://git.kernel.org/stable/c/dc67d528c2fa939cec7fe3bf7f3089c8d281ca3d
git.kernel.org/stable/c/e1bb114e09... WEB
https://git.kernel.org/stable/c/e1bb114e09372fd6e03387ced9ef566da336ed6c

Frequently Asked Questions

What is CVE-2026-74587?
CVE-2026-74587 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-2026-74587?
Upgrading to current release patches (or the latest patched release for your respective branch) resolves the vulnerability.
What is the CVSS score of CVE-2026-74587?
CVE-2026-74587 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-2026-74587?
CVE-2026-74587 is classified under General Security Weakness.
How can I check Maven dependencies for CVE-2026-74587?
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-5vmc-fx99-r54r",
  "modified" : "2026-08-25T06:31:21Z",
  "published" : "2026-08-22T18:30:24Z",
  "aliases" : [ "CVE-2026-74587" ],
  "details" : "In the Linux kernel, the following vulnerability has been resolved:\n\nsctp: fix use-after-free of cached ASCONF chunk\n\naddip_last_asconf caches the outstanding outbound ASCONF chunk. The normal\nASCONF-ACK completion path releases the chunk and clears the pointer.\n\nHowever, sctp_asconf_queue_teardown() releases the cached chunk without\nclearing addip_last_asconf. During peer restart handling,\nsctp_sf_do_dupcook_a() queues SCTP_CMD_PURGE_ASCONF_QUEUE, which invokes\nsctp_asconf_queue_teardown() while the association remains alive and leaves\nthe pointer dangling.\n\nA delayed authenticated ASCONF-ACK can then reach sctp_sf_do_asconf_ack(),\nwhich accesses the stale chunk and passes it to sctp_process_asconf_ack(),\ncausing a use-after-free and a second release.\n\nClearing the pointer exposes a race with T4 expiry. Peer restart handling\nqueues the timer stop before the purge, but SCTP_CMD_TIMER_STOP uses\ntimer_delete(), which does not wait for a callback already running on\nanother CPU. Such a callback can reach sctp_sf_t4_timer_expire() after\nthe purge and dereference NULL.\n\nClear addip_last_asconf after releasing the cached chunk, and make\nsctp_sf_t4_timer_expire() consume a stale T4 expiry if no outstanding\nASCONF remains.",
  "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-2026-74587"
  }, {
    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/07daf4f9750104960a1d60831b2353c0d41f35fb"
  }, {
    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/10459b03e2d9ee12435e96f587de4d4cacdbf435"
  }, {
    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/179676f0166230c80053a392303485b37c93dd33"
  }, {
    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/618b5c6d049896fcfabb91afc072954c92cb2693"
  }, {
    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/8c283e7b56adce00193837f3311b06662466fb21"
  }, {
    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/d949992bc3f00027a2c755e860a11950c75f6073"
  }, {
    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/dc67d528c2fa939cec7fe3bf7f3089c8d281ca3d"
  }, {
    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/e1bb114e09372fd6e03387ced9ef566da336ed6c"
  } ],
  "database_specific" : {
    "cwe_ids" : [ ],
    "severity" : "CRITICAL",
    "github_reviewed" : false,
    "github_reviewed_at" : null,
    "nvd_published_at" : "2026-08-22T16:16:30Z"
  }
}