CVE-2026-64579: Software Security Vulnerability Vulnerability

UNKNOWN
Advisory Identifier: GHSA-4969-9gf7-vmr2
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Advisory Summary

CVE-2026-64579 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-2026-64579 at a Glance

CVE Identifier CVE-2026-64579
GHSA Identifier GHSA-4969-9gf7-vmr2
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-2026-64579

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-2026-64579, 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: xfrm: policy: preallocate inexact bins before xfrm_hash_rebuild reinsert xfrm_hash_rebuild()'s first loop preallocates the bins/chains the reinsert loop needs, so the reinsert (after hlist_del_rcu()) cannot allocate or fail. But its guard is inverted: it skips policies with prefixlen < threshold and preallocates for the rest. prefixlen < threshold is exactly when policy_hash_bysel() returns NULL and the reinsert takes the allocating xfrm_policy_inexact_insert() path. So the loop preallocates for the exact policies (which never allocate) and skips the inexact ones, whose bin/node is then allocated GFP_ATOMIC during reinsert. On failure the error path only WARN_ONCE()s and continues, leaving a poisoned bydst node; the next rebuild's hlist_del_rcu() dereferences LIST_POISON2 and takes a GPF. Reachable under memory pressure, deterministic via failslab. Invert the guard so preallocation covers exactly the reinserted policies; the reinsert then allocates nothing and cannot fail. Crash: Oops: general protection fault, probably for non-canonical address 0xfbd59c0000000024: 0000 [#1] SMP KASAN NOPTI KASAN: maybe wild-memory-access in range [0xdead...] ... Workqueue: events xfrm_hash_rebuild RIP: 0010:xfrm_hash_rebuild+0x5b3/0x1190 RAX: dead000000000122 (LIST_POISON2 + offset) ... Call Trace: hlist_del_rcu (include/linux/rculist.h:599) xfrm_hash_rebuild (net/xfrm/xfrm_policy.c:1365) process_one_work (kernel/workqueue.c:3322) worker_thread (kernel/workqueue.c:3486) kthread (kernel/kthread.c:436) ret_from_fork (arch/x86/kernel/process.c:158) ret_from_fork_asm (arch/x86/entry/entry_64.S:245) ... Kernel panic - not syncing: Fatal exception in interrupt

References

NVD — CVE-2026-64579 NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-64579
git.kernel.org/stable/c/1cdeed9df1... WEB
https://git.kernel.org/stable/c/1cdeed9df1306f1a277e715600772640d63defa9
git.kernel.org/stable/c/43a4d51052... WEB
https://git.kernel.org/stable/c/43a4d510523779891cf8eca7ffb4a086b0b5d8bf
git.kernel.org/stable/c/6aa3796d18... WEB
https://git.kernel.org/stable/c/6aa3796d18a9fda953ad76a62b57bf6c145cb9ef
git.kernel.org/stable/c/7acc5ed2f3... WEB
https://git.kernel.org/stable/c/7acc5ed2f33608a3d83b64f50a5766843b6e2485
git.kernel.org/stable/c/94c00391a5... WEB
https://git.kernel.org/stable/c/94c00391a5117530188334f740ce26d3f1256190
git.kernel.org/stable/c/d9d9cc21cc... WEB
https://git.kernel.org/stable/c/d9d9cc21cc90014724a14c447e3d587be9447107
git.kernel.org/stable/c/e48f4c3e3d... WEB
https://git.kernel.org/stable/c/e48f4c3e3df35b34be719d72d737bbeaca77cf0c
git.kernel.org/stable/c/f38f8cce2f... WEB
https://git.kernel.org/stable/c/f38f8cce2f7e79775b3db7e8a5eacda04ac908e4

Frequently Asked Questions

What is CVE-2026-64579?
CVE-2026-64579 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-2026-64579?
Upgrading to current release patches (or the latest patched release for your respective branch) resolves the vulnerability.
What CWE is associated with CVE-2026-64579?
CVE-2026-64579 is classified under General Security Weakness.
How can I check Maven dependencies for CVE-2026-64579?
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-4969-9gf7-vmr2",
  "modified" : "2026-08-19T18:32:04Z",
  "published" : "2026-08-05T09:31:17Z",
  "aliases" : [ "CVE-2026-64579" ],
  "details" : "In the Linux kernel, the following vulnerability has been resolved:\n\nxfrm: policy: preallocate inexact bins before xfrm_hash_rebuild reinsert\n\nxfrm_hash_rebuild()'s first loop preallocates the bins/chains the reinsert\nloop needs, so the reinsert (after hlist_del_rcu()) cannot allocate or\nfail. But its guard is inverted: it skips policies with prefixlen <\nthreshold and preallocates for the rest.\n\nprefixlen < threshold is exactly when policy_hash_bysel() returns NULL and\nthe reinsert takes the allocating xfrm_policy_inexact_insert() path. So the\nloop preallocates for the exact policies (which never allocate) and skips\nthe inexact ones, whose bin/node is then allocated GFP_ATOMIC during\nreinsert. On failure the error path only WARN_ONCE()s and continues,\nleaving a poisoned bydst node; the next rebuild's hlist_del_rcu()\ndereferences LIST_POISON2 and takes a GPF. Reachable under memory pressure,\ndeterministic via failslab.\n\nInvert the guard so preallocation covers exactly the reinserted policies;\nthe reinsert then allocates nothing and cannot fail.\n\nCrash:\n  Oops: general protection fault, probably for non-canonical address\n  0xfbd59c0000000024: 0000 [#1] SMP KASAN NOPTI\n  KASAN: maybe wild-memory-access in range [0xdead...]\n  ...\n  Workqueue: events xfrm_hash_rebuild\n  RIP: 0010:xfrm_hash_rebuild+0x5b3/0x1190\n  RAX: dead000000000122   (LIST_POISON2 + offset)\n  ...\n  Call Trace:\n   hlist_del_rcu (include/linux/rculist.h:599)\n   xfrm_hash_rebuild (net/xfrm/xfrm_policy.c:1365)\n   process_one_work (kernel/workqueue.c:3322)\n   worker_thread (kernel/workqueue.c:3486)\n   kthread (kernel/kthread.c:436)\n   ret_from_fork (arch/x86/kernel/process.c:158)\n   ret_from_fork_asm (arch/x86/entry/entry_64.S:245)\n   ...\n  Kernel panic - not syncing: Fatal exception in interrupt",
  "severity" : [ ],
  "affected" : [ ],
  "references" : [ {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2026-64579"
  }, {
    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/1cdeed9df1306f1a277e715600772640d63defa9"
  }, {
    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/43a4d510523779891cf8eca7ffb4a086b0b5d8bf"
  }, {
    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/6aa3796d18a9fda953ad76a62b57bf6c145cb9ef"
  }, {
    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/7acc5ed2f33608a3d83b64f50a5766843b6e2485"
  }, {
    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/94c00391a5117530188334f740ce26d3f1256190"
  }, {
    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/d9d9cc21cc90014724a14c447e3d587be9447107"
  }, {
    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/e48f4c3e3df35b34be719d72d737bbeaca77cf0c"
  }, {
    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/f38f8cce2f7e79775b3db7e8a5eacda04ac908e4"
  } ],
  "database_specific" : {
    "cwe_ids" : [ ],
    "severity" : null,
    "github_reviewed" : false,
    "github_reviewed_at" : null,
    "nvd_published_at" : "2026-08-05T08:16:37Z"
  }
}