CVE-2026-72126: Software Security Vulnerability Vulnerability

HIGH
Advisory Identifier: GHSA-5j9g-r9x8-9248
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CVSS 7.8
Published
Advisory Summary

CVE-2026-72126 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-2026-72126 at a Glance

CVE Identifier CVE-2026-72126
GHSA Identifier GHSA-5j9g-r9x8-9248
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-2026-72126

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-2026-72126, 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: can: isotp: use unconditional synchronize_rcu() in isotp_release() isotp_notify() unregisters the (RCU) CAN filters via can_rx_unregister() and clears so->bound without waiting for a grace period. isotp_release() uses so->bound to decide whether it needs to call synchronize_rcu() before cancelling so->rxtimer, so when NETDEV_UNREGISTER runs first it skips that synchronize_rcu() and can cancel the timer while an in-flight isotp_rcv() is still executing and about to re-arm it via isotp_send_fc(), leading to a use-after-free timer callback on the freed socket. sakisho-bot remarked a problem with rtnl_lock held in isotp_notify(), therefore make isotp_release() always call synchronize_rcu() before cancelling the timers, regardless of so->bound. This still closes the original race (isotp_notify() clearing so->bound without waiting for in-flight isotp_rcv() callers before isotp_release() cancels the RX timer) without adding any RCU wait to the netdevice notifier path.

References

NVD — CVE-2026-72126 NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-72126
git.kernel.org/stable/c/15413a082d... WEB
https://git.kernel.org/stable/c/15413a082df69175c2f96aeab4c26fe1ff7cff03
git.kernel.org/stable/c/59672aa4bc... WEB
https://git.kernel.org/stable/c/59672aa4bcd8d32172c1ff6a179583981d6acabc
git.kernel.org/stable/c/6280eda96e... WEB
https://git.kernel.org/stable/c/6280eda96e0707264849fa7d036fed873c1f8a6d
git.kernel.org/stable/c/945d989450... WEB
https://git.kernel.org/stable/c/945d9894502cd9124f5d676181c542ed2000f7c0
git.kernel.org/stable/c/9b1a02e0d9... WEB
https://git.kernel.org/stable/c/9b1a02e0d980ac6b0e36a90378f847062f81d7e4
git.kernel.org/stable/c/b8278ff605... WEB
https://git.kernel.org/stable/c/b8278ff605187ef3fa0f2705e93251cce4c4f8ee
git.kernel.org/stable/c/b88a511308... WEB
https://git.kernel.org/stable/c/b88a511308779c225005d7994b8744561bdbafbc
git.kernel.org/stable/c/cb6abc584a... WEB
https://git.kernel.org/stable/c/cb6abc584a1bfab107ac003d64948a4aef1730aa

Frequently Asked Questions

What is CVE-2026-72126?
CVE-2026-72126 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-2026-72126?
Upgrading to current release patches (or the latest patched release for your respective branch) resolves the vulnerability.
What is the CVSS score of CVE-2026-72126?
CVE-2026-72126 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-2026-72126?
CVE-2026-72126 is classified under General Security Weakness.
How can I check Maven dependencies for CVE-2026-72126?
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-5j9g-r9x8-9248",
  "modified" : "2026-08-17T06:33:11Z",
  "published" : "2026-08-15T06:32:13Z",
  "aliases" : [ "CVE-2026-72126" ],
  "details" : "In the Linux kernel, the following vulnerability has been resolved:\n\ncan: isotp: use unconditional synchronize_rcu() in isotp_release()\n\nisotp_notify() unregisters the (RCU) CAN filters via can_rx_unregister()\nand clears so->bound without waiting for a grace period. isotp_release()\nuses so->bound to decide whether it needs to call synchronize_rcu()\nbefore cancelling so->rxtimer, so when NETDEV_UNREGISTER runs first it\nskips that synchronize_rcu() and can cancel the timer while an\nin-flight isotp_rcv() is still executing and about to re-arm it via\nisotp_send_fc(), leading to a use-after-free timer callback on the\nfreed socket.\n\nsakisho-bot remarked a problem with rtnl_lock held in isotp_notify(),\ntherefore make isotp_release() always call synchronize_rcu() before\ncancelling the timers, regardless of so->bound. This still closes the\noriginal race (isotp_notify() clearing so->bound without waiting for\nin-flight isotp_rcv() callers before isotp_release() cancels the RX\ntimer) without adding any RCU wait to the netdevice notifier path.",
  "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" : [ ],
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    "url" : "https://git.kernel.org/stable/c/cb6abc584a1bfab107ac003d64948a4aef1730aa"
  } ],
  "database_specific" : {
    "cwe_ids" : [ ],
    "severity" : "HIGH",
    "github_reviewed" : false,
    "github_reviewed_at" : null,
    "nvd_published_at" : "2026-08-15T06:21:29Z"
  }
}