CVE-2026-72338: Software Security Vulnerability Vulnerability

HIGH
Advisory Identifier: GHSA-hgh2-wfvr-f9mp
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CVSS 7.8
Published
Advisory Summary

CVE-2026-72338 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-2026-72338 at a Glance

CVE Identifier CVE-2026-72338
GHSA Identifier GHSA-hgh2-wfvr-f9mp
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-2026-72338

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-2026-72338, 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: net/sched: act_pedit: fix TOCTOU heap OOB write in tc offload There is a TOCTOU race condition in flower lockless approach between sizing a flow_rule buffer and filling it. zdi-disclosures@trendmicro.com reports: The cls_flower classifier operates with TCF_PROTO_OPS_DOIT_UNLOCKED (fl_change runs without RTNL), while RTM_NEWACTION holds RTNL, so the independent locking domains make the race reachable in practice. KASAN confirms: BUG: KASAN: slab-out-of-bounds in tcf_pedit_offload_act_setup+0x81b/0x930 Write of size 4 at addr ffff888001f27520 by task poc-toctou/312 The buggy address is located 0 bytes to the right of allocated 288-byte region [ffff888001f27400, ffff888001f27520) (cache kmalloc-512) Note: The result is a heap OOB write attacker-controlled content into the adjacent slab object (requires CAP_NET_ADMIN). The fix introduces reading tcfp_nkeys under act->tcfa_lock in all places using a new tcf_pedit_nkeys_locked() which replaces the old tcf_pedit_nkeys(). Additionally we close the remaining TOCTOU window between the sizing read and the fill reads by more careful accounting. Rather than silently truncating the key count, which leads to incorrect action semantics offloaded to hardware and secondary OOB writes if the remaining capacity is zero or consumed by prior actions, we enforce remaining capacity checks and return -ENOSPC if the required space exceeds the remaining capacity.

References

NVD — CVE-2026-72338 NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-72338
git.kernel.org/stable/c/0d8532a5e9... WEB
https://git.kernel.org/stable/c/0d8532a5e972a5351cf4ee4a435e0d65cbba8f23
git.kernel.org/stable/c/27488e1a7f... WEB
https://git.kernel.org/stable/c/27488e1a7f19757e6146edca9458ed4ffc545557
git.kernel.org/stable/c/6f9b23eb92... WEB
https://git.kernel.org/stable/c/6f9b23eb92a894ae1118893996943990ee0b860e
git.kernel.org/stable/c/8b519cbcab... WEB
https://git.kernel.org/stable/c/8b519cbcabe836a441369fbec1a8a6518a709251
git.kernel.org/stable/c/8e49cd891b... WEB
https://git.kernel.org/stable/c/8e49cd891bda447c68122d672510a604a8bb6b24

Frequently Asked Questions

What is CVE-2026-72338?
CVE-2026-72338 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-2026-72338?
Upgrading to current release patches (or the latest patched release for your respective branch) resolves the vulnerability.
What is the CVSS score of CVE-2026-72338?
CVE-2026-72338 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-2026-72338?
CVE-2026-72338 is classified under General Security Weakness.
How can I check Maven dependencies for CVE-2026-72338?
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-hgh2-wfvr-f9mp",
  "modified" : "2026-08-17T06:33:24Z",
  "published" : "2026-08-15T06:32:21Z",
  "aliases" : [ "CVE-2026-72338" ],
  "details" : "In the Linux kernel, the following vulnerability has been resolved:\n\nnet/sched: act_pedit: fix TOCTOU heap OOB write in tc offload\n\nThere is a TOCTOU race condition in flower lockless approach between sizing\na flow_rule buffer and filling it.\nzdi-disclosures@trendmicro.com reports:\nThe cls_flower classifier operates with TCF_PROTO_OPS_DOIT_UNLOCKED\n(fl_change runs without RTNL), while RTM_NEWACTION holds RTNL, so the\nindependent locking domains make the race reachable in practice.  KASAN\nconfirms:\n  BUG: KASAN: slab-out-of-bounds in tcf_pedit_offload_act_setup+0x81b/0x930\n  Write of size 4 at addr ffff888001f27520 by task poc-toctou/312\n  The buggy address is located 0 bytes to the right of\n   allocated 288-byte region [ffff888001f27400, ffff888001f27520)\n   (cache kmalloc-512)\n\nNote: The result is a heap OOB write attacker-controlled content into the\nadjacent slab object (requires CAP_NET_ADMIN).\n\nThe fix introduces reading tcfp_nkeys under act->tcfa_lock in all places\nusing a new tcf_pedit_nkeys_locked() which replaces the old tcf_pedit_nkeys().\nAdditionally we close the remaining TOCTOU window between the sizing read and\nthe fill reads by more careful accounting.\nRather than silently truncating the key count, which leads to incorrect\naction semantics offloaded to hardware and secondary OOB writes if\nthe remaining capacity is zero or consumed by prior actions, we enforce\nremaining capacity checks and return -ENOSPC if the required space exceeds\nthe remaining capacity.",
  "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-2026-72338"
  }, {
    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/0d8532a5e972a5351cf4ee4a435e0d65cbba8f23"
  }, {
    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/27488e1a7f19757e6146edca9458ed4ffc545557"
  }, {
    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/6f9b23eb92a894ae1118893996943990ee0b860e"
  }, {
    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/8b519cbcabe836a441369fbec1a8a6518a709251"
  }, {
    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/8e49cd891bda447c68122d672510a604a8bb6b24"
  } ],
  "database_specific" : {
    "cwe_ids" : [ ],
    "severity" : "HIGH",
    "github_reviewed" : false,
    "github_reviewed_at" : null,
    "nvd_published_at" : "2026-08-15T06:22:07Z"
  }
}