CVE-2026-90248: Software Security Vulnerability Vulnerability

UNKNOWN
Advisory Identifier: GHSA-rm9p-rr32-f7j6
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Advisory Summary

CVE-2026-90248 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-2026-90248 at a Glance

CVE Identifier CVE-2026-90248
GHSA Identifier GHSA-rm9p-rr32-f7j6
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-2026-90248

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-2026-90248, 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: cls_api: fix teardown of an adopted proto on insert-race loss In tc_new_tfilter() the create branch sets tp_created = 1 before calling tcf_chain_tp_insert_unique(). When the caller loses the race (another request inserted a proto at the same chain/prio first), insert_unique() destroys the caller's own tp_new and returns the winner's proto with an extra reference. tp_created was never cleared, so the loser's errout path treated the winner's live proto as its own and called tcf_chain_tp_delete_empty() on it, silently unlinking an active classifier that the winning request already advertised via RTM_NEWTFILTER. Track the outcome of the insert step in a single tri-state variable so each errout path reacts correctly: - TP_NOT_CREATED: no proto created; pursue the old path. - TP_CREATED: proto inserted successfully; same code path as before. - TP_NOT_OWNED: New - lost the insert race; tp is another request's proto (chain ref already released by tp_new's destroy) Both errout reactions are single expressions derived from the state. This fix is motivated by the Sashiko's automated review of Patch (net/sched: cls_api: Always acquire rtnl_lock when destroying locked classifiers) [1][2]. The review identified the silent-unlink behaviour of an adopted proto's teardown when a request loses the tcf_chain_tp_insert_unique() race. [1] https://sashiko.dev/#/patchset/20260801125632.360365-1-jhs%40mojatatu.com [2] https://netdev-ai.bots.linux.dev/sashiko/#/patchset/20260801125632.360365-1-jhs%40mojatatu.com

References

NVD — CVE-2026-90248 NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-90248
git.kernel.org/stable/c/219c87aeef... WEB
https://git.kernel.org/stable/c/219c87aeefdcc8c1caf28cc99e9b361ce7393d3a
git.kernel.org/stable/c/a68e664ddf... WEB
https://git.kernel.org/stable/c/a68e664ddf16ecae6d769d6a2eb356f8abab75c9
git.kernel.org/stable/c/bbe2fd6d77... WEB
https://git.kernel.org/stable/c/bbe2fd6d77df630356185406a97317f6aa6a92cf
git.kernel.org/stable/c/bee2208276... WEB
https://git.kernel.org/stable/c/bee2208276c8e0e40a249ffdcf6e5434a79a847c
git.kernel.org/stable/c/d4e359b360... WEB
https://git.kernel.org/stable/c/d4e359b3608a0e184bbe8d61a5c3b50d0831c44a
git.kernel.org/stable/c/dc8b33b819... WEB
https://git.kernel.org/stable/c/dc8b33b819cb02a75936940c120aa669ad89942d
git.kernel.org/stable/c/df02b6dc13... WEB
https://git.kernel.org/stable/c/df02b6dc136af45e92ee4c86f4aa6c9a60790b1e

Frequently Asked Questions

What is CVE-2026-90248?
CVE-2026-90248 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-2026-90248?
Upgrading to current release patches (or the latest patched release for your respective branch) resolves the vulnerability.
What CWE is associated with CVE-2026-90248?
CVE-2026-90248 is classified under General Security Weakness.
How can I check Maven dependencies for CVE-2026-90248?
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-rm9p-rr32-f7j6",
  "modified" : "2026-09-17T18:31:57Z",
  "published" : "2026-09-17T18:31:57Z",
  "aliases" : [ "CVE-2026-90248" ],
  "details" : "In the Linux kernel, the following vulnerability has been resolved:\n\nnet/sched: cls_api: fix teardown of an adopted proto on insert-race loss\n\nIn tc_new_tfilter() the create branch sets tp_created = 1 before calling\ntcf_chain_tp_insert_unique(). When the caller loses the race (another\nrequest inserted a proto at the same chain/prio first), insert_unique()\ndestroys the caller's own tp_new and returns the winner's proto with an\nextra reference. tp_created was never cleared, so the loser's errout\npath treated the winner's live proto as its own and called\ntcf_chain_tp_delete_empty() on it, silently unlinking an active\nclassifier that the winning request already advertised via\nRTM_NEWTFILTER.\n\nTrack the outcome of the insert step in a single tri-state variable so\neach errout path reacts correctly:\n\n- TP_NOT_CREATED: no proto created; pursue the old path.\n- TP_CREATED: proto inserted successfully; same code path as before.\n- TP_NOT_OWNED: New - lost the insert race; tp is another request's proto\n  (chain ref already released by tp_new's destroy)\n\nBoth errout reactions are single expressions derived from the state.\n\nThis fix is motivated by the Sashiko's automated review of Patch\n(net/sched: cls_api: Always acquire rtnl_lock when destroying locked\nclassifiers) [1][2]. The review identified the silent-unlink behaviour of\nan adopted proto's teardown when a request loses the\ntcf_chain_tp_insert_unique() race.\n\n[1] https://sashiko.dev/#/patchset/20260801125632.360365-1-jhs%40mojatatu.com\n[2] https://netdev-ai.bots.linux.dev/sashiko/#/patchset/20260801125632.360365-1-jhs%40mojatatu.com",
  "severity" : [ ],
  "affected" : [ ],
  "references" : [ {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2026-90248"
  }, {
    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/219c87aeefdcc8c1caf28cc99e9b361ce7393d3a"
  }, {
    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/a68e664ddf16ecae6d769d6a2eb356f8abab75c9"
  }, {
    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/bbe2fd6d77df630356185406a97317f6aa6a92cf"
  }, {
    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/bee2208276c8e0e40a249ffdcf6e5434a79a847c"
  }, {
    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/d4e359b3608a0e184bbe8d61a5c3b50d0831c44a"
  }, {
    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/dc8b33b819cb02a75936940c120aa669ad89942d"
  }, {
    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/df02b6dc136af45e92ee4c86f4aa6c9a60790b1e"
  } ],
  "database_specific" : {
    "cwe_ids" : [ ],
    "severity" : null,
    "github_reviewed" : false,
    "github_reviewed_at" : null,
    "nvd_published_at" : "2026-09-17T17:17:20Z"
  }
}