CVE-2026-98591: Software Security Vulnerability Vulnerability

UNKNOWN
Advisory Identifier: GHSA-4j29-hvp6-5v88
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Advisory Summary

CVE-2026-98591 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-2026-98591 at a Glance

CVE Identifier CVE-2026-98591
GHSA Identifier GHSA-4j29-hvp6-5v88
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-2026-98591

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-2026-98591, 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: bpf: Fix bounds check for skb-backed dynptrs The skb_pointer_if_linear() function checks whether a memory region of length len starting at offset off into the skb is in the linear area, and returns a pointer to the region if so. The check currently subtracts between skb_headlen and offset of the check, and since skb_headlen is unsigned the subtraction can underflow. This causes the bounds check to spuriously pass and generate an arbitrary pointer of the form *(skb->data + off). The only user of this helper is currently skb-backed BPF dynptr code. Returning the wrong pointer leads to the dynptr erroneously being backed with invalid memory. Ensure the subtraction cannot underflow, and fail the check if it would. Use u64 arithmetic to also prevent overflow when calculating (skb_headlen(skb) - off) since off is unsigned.

References

NVD — CVE-2026-98591 NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-98591
git.kernel.org/stable/c/1196903a27... WEB
https://git.kernel.org/stable/c/1196903a27cac5c929c7517e987a8d159f20c5e5
git.kernel.org/stable/c/1b92353859... WEB
https://git.kernel.org/stable/c/1b923538598be768e9f2f258a77a083d00e0c78b
git.kernel.org/stable/c/37877a2475... WEB
https://git.kernel.org/stable/c/37877a24758068742fef687a7cf5362360dde1d1
git.kernel.org/stable/c/39ffceaddb... WEB
https://git.kernel.org/stable/c/39ffceaddb10753eac12785dba6ac0673860b4ac
git.kernel.org/stable/c/ed6eec97b5... WEB
https://git.kernel.org/stable/c/ed6eec97b534979dcf28b40c389cee57bd6561d4

Frequently Asked Questions

What is CVE-2026-98591?
CVE-2026-98591 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-2026-98591?
Upgrading to current release patches (or the latest patched release for your respective branch) resolves the vulnerability.
What CWE is associated with CVE-2026-98591?
CVE-2026-98591 is classified under General Security Weakness.
How can I check Maven dependencies for CVE-2026-98591?
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-4j29-hvp6-5v88",
  "modified" : "2026-10-18T18:31:55Z",
  "published" : "2026-10-18T18:31:55Z",
  "aliases" : [ "CVE-2026-98591" ],
  "details" : "In the Linux kernel, the following vulnerability has been resolved:\n\nbpf: Fix bounds check for skb-backed dynptrs\n\nThe skb_pointer_if_linear() function checks whether a\nmemory region of length len starting at offset off into\nthe skb is in the linear area, and returns a pointer to\nthe region if so. The check currently subtracts between\nskb_headlen and offset of the check, and since skb_headlen\nis unsigned the subtraction can underflow. This causes the\nbounds check to spuriously pass and generate an arbitrary\npointer of the form *(skb->data + off).\n\nThe only user of this helper is currently skb-backed BPF\ndynptr code. Returning the wrong pointer leads to the\ndynptr erroneously being backed with invalid memory.\n\nEnsure the subtraction cannot underflow, and fail the check if\nit would. Use u64 arithmetic to also prevent overflow when\ncalculating (skb_headlen(skb) - off) since off is unsigned.",
  "severity" : [ ],
  "affected" : [ ],
  "references" : [ {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2026-98591"
  }, {
    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/1196903a27cac5c929c7517e987a8d159f20c5e5"
  }, {
    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/1b923538598be768e9f2f258a77a083d00e0c78b"
  }, {
    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/37877a24758068742fef687a7cf5362360dde1d1"
  }, {
    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/39ffceaddb10753eac12785dba6ac0673860b4ac"
  }, {
    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/ed6eec97b534979dcf28b40c389cee57bd6561d4"
  } ],
  "database_specific" : {
    "cwe_ids" : [ ],
    "severity" : null,
    "github_reviewed" : false,
    "github_reviewed_at" : null,
    "nvd_published_at" : "2026-10-18T16:17:11Z"
  }
}