CVE-2026-68338: Software Security Vulnerability Vulnerability

HIGH
Advisory Identifier: GHSA-xrw5-g7cv-c5p3
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CVSS 7.8
CWE-362
Published
Advisory Summary

CVE-2026-68338 is a HIGH (CVSS 7.8) security vulnerability vulnerability (CWE-362: Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')) affecting Software libraries in the Maven ecosystem. The weakness occurs when the product contains a concurrent code sequence that requires temporary, exclusive access to a shared resource, but a timing window exists in which the shared resource can be modified by another code sequence operating concurrently.. Remediation is available in the latest vendor maintenance releases.

CVE-2026-68338 at a Glance

CVE Identifier CVE-2026-68338
GHSA Identifier GHSA-xrw5-g7cv-c5p3
Severity HIGH
CVSS v3.1 Base Score 7.8
CWE Classification CWE-362: Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')
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-2026-68338

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-2026-68338, 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-362: Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition'), where the product contains a concurrent code sequence that requires temporary, exclusive access to a shared resource, but a timing window exists in which the shared resource can be modified by another code sequence operating concurrently. 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/packet: avoid fanout hook re-registration after unregister packet_set_ring() temporarily detaches a socket from packet delivery while reconfiguring its ring. It records the previous running state, clears po->num, unregisters the protocol hook when needed, drops po->bind_lock, and later restores po->num and re-registers the hook from the saved was_running value. That unlocked window can race with NETDEV_UNREGISTER. The notifier can observe the socket as not running, skip __unregister_prot_hook(), and invalidate the per-socket binding by setting po->ifindex to -1 and clearing po->prot_hook.dev. A one-member fanout group can still retain its shared fanout hook device pointer. When packet_set_ring() resumes, re-registering solely from the stale was_running state can re-add the fanout hook after the device has been unregistered. Treat po->ifindex == -1 as an invalidated binding after reacquiring po->bind_lock. This is distinct from ifindex 0, the normal unbound/wildcard state: ifindex -1 marks an existing device binding that was invalidated when the device was unregistered. Restore po->num as before, but do not re-register the hook if device unregister already detached the socket.

References

NVD — CVE-2026-68338 NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-68338
git.kernel.org/stable/c/0a052e0808... WEB
https://git.kernel.org/stable/c/0a052e0808e015e68144a9877e6ef42b952c49fa
git.kernel.org/stable/c/1bc55c29cd... WEB
https://git.kernel.org/stable/c/1bc55c29cd85818e9052f17deb287d5a11fb817f
git.kernel.org/stable/c/4628efbdc7... WEB
https://git.kernel.org/stable/c/4628efbdc7affd094181f5263e65c1062e31f15f
git.kernel.org/stable/c/50aff80475... WEB
https://git.kernel.org/stable/c/50aff80475abd3533eef4320477037e6fcc6b56e
git.kernel.org/stable/c/80ec024d53... WEB
https://git.kernel.org/stable/c/80ec024d53a05c60ad1d08968dcf745f10c1665c
git.kernel.org/stable/c/a885387dae... WEB
https://git.kernel.org/stable/c/a885387dae7986a55bae5c77a15bdd447f64e9b9
git.kernel.org/stable/c/acb40ebfa5... WEB
https://git.kernel.org/stable/c/acb40ebfa5c4d62f84339fcbf713f2a9fd033a71
git.kernel.org/stable/c/c820f4b7f2... WEB
https://git.kernel.org/stable/c/c820f4b7f2fa38f8769db0d0cefdd94e2721504d

Frequently Asked Questions

What is CVE-2026-68338?
CVE-2026-68338 is a security vulnerability in Software classified as a security vulnerability vulnerability under CWE-362: Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition').
Which Software versions are affected?
Affected versions include releases prior to current release patches.
What version fixes CVE-2026-68338?
Upgrading to current release patches (or the latest patched release for your respective branch) resolves the vulnerability.
What is the CVSS score of CVE-2026-68338?
CVE-2026-68338 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-2026-68338?
CVE-2026-68338 is classified under CWE-362: Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition') (The product contains a concurrent code sequence that requires temporary, exclusive access to a shared resource, but a timing window exists in which the shared resource can be modified by another code sequence operating concurrently.).
How can I check Maven dependencies for CVE-2026-68338?
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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  "schema_version" : "1.4.0",
  "id" : "GHSA-xrw5-g7cv-c5p3",
  "modified" : "2026-08-19T18:32:15Z",
  "published" : "2026-08-10T15:33:46Z",
  "aliases" : [ "CVE-2026-68338" ],
  "details" : "In the Linux kernel, the following vulnerability has been resolved:\n\nnet/packet: avoid fanout hook re-registration after unregister\n\npacket_set_ring() temporarily detaches a socket from packet delivery while\nreconfiguring its ring. It records the previous running state, clears\npo->num, unregisters the protocol hook when needed, drops po->bind_lock,\nand later restores po->num and re-registers the hook from the saved\nwas_running value.\n\nThat unlocked window can race with NETDEV_UNREGISTER. The notifier can\nobserve the socket as not running, skip __unregister_prot_hook(), and\ninvalidate the per-socket binding by setting po->ifindex to -1 and clearing\npo->prot_hook.dev. A one-member fanout group can still retain its shared\nfanout hook device pointer. When packet_set_ring() resumes, re-registering\nsolely from the stale was_running state can re-add the fanout hook after\nthe device has been unregistered.\n\nTreat po->ifindex == -1 as an invalidated binding after reacquiring\npo->bind_lock. This is distinct from ifindex 0, the normal\nunbound/wildcard state: ifindex -1 marks an existing device binding that\nwas invalidated when the device was unregistered. Restore po->num as\nbefore, but do not re-register the hook if device unregister already\ndetached the socket.",
  "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-2026-68338"
  }, {
    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/0a052e0808e015e68144a9877e6ef42b952c49fa"
  }, {
    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/1bc55c29cd85818e9052f17deb287d5a11fb817f"
  }, {
    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/4628efbdc7affd094181f5263e65c1062e31f15f"
  }, {
    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/50aff80475abd3533eef4320477037e6fcc6b56e"
  }, {
    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/80ec024d53a05c60ad1d08968dcf745f10c1665c"
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    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/a885387dae7986a55bae5c77a15bdd447f64e9b9"
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    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/acb40ebfa5c4d62f84339fcbf713f2a9fd033a71"
  }, {
    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/c820f4b7f2fa38f8769db0d0cefdd94e2721504d"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-362" ],
    "severity" : "HIGH",
    "github_reviewed" : false,
    "github_reviewed_at" : null,
    "nvd_published_at" : "2026-08-10T13:20:24Z"
  }
}