CVE-2026-98318: Software Security Vulnerability Vulnerability

HIGH
Advisory Identifier: GHSA-fp2w-r96h-w2cp
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CVSS 7.8
Published
Advisory Summary

CVE-2026-98318 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-2026-98318 at a Glance

CVE Identifier CVE-2026-98318
GHSA Identifier GHSA-fp2w-r96h-w2cp
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-2026-98318

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-2026-98318, 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: smb: client: validate absolute native symlink targets before NT fixups With symlinkroot unset, an absolute target is copied without conversion to an NT drive path. Later code still assumes an NT prefix is present when modifying the target and calculating the print name length. For "/ab", this causes two failures: sym[5] and path[5] are written past their allocations, and plen -= 2 * poff subtracts an assumed 8-byte prefix from a 6-byte UTF-16 target, wrapping u16 plen to 65534. That underflow causes another overflow: memcpy() copies 65534 bytes into a 24-byte buffer. A user with write access to a mounted share can trigger these bugs with default settings. Validate the NT drive prefix, including an ASCII drive letter, before accessing fixed offsets or subtracting the prefix length.

References

NVD — CVE-2026-98318 NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-98318
git.kernel.org/stable/c/23c240d950... WEB
https://git.kernel.org/stable/c/23c240d9509e15f72e4112fc95f0160ab32ec430
git.kernel.org/stable/c/6913ff607c... WEB
https://git.kernel.org/stable/c/6913ff607c2bc8694193e1fcc40bf16d75f35f16

Frequently Asked Questions

What is CVE-2026-98318?
CVE-2026-98318 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-2026-98318?
Upgrading to current release patches (or the latest patched release for your respective branch) resolves the vulnerability.
What is the CVSS score of CVE-2026-98318?
CVE-2026-98318 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-2026-98318?
CVE-2026-98318 is classified under General Security Weakness.
How can I check Maven dependencies for CVE-2026-98318?
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-fp2w-r96h-w2cp",
  "modified" : "2026-10-07T09:32:15Z",
  "published" : "2026-10-06T09:31:34Z",
  "aliases" : [ "CVE-2026-98318" ],
  "details" : "In the Linux kernel, the following vulnerability has been resolved:\n\nsmb: client: validate absolute native symlink targets before NT fixups\n\nWith symlinkroot unset, an absolute target is copied without conversion\nto an NT drive path. Later code still assumes an NT prefix is present\nwhen modifying the target and calculating the print name length.\n\nFor \"/ab\", this causes two failures: sym[5] and path[5] are written\npast their allocations, and plen -= 2 * poff subtracts an assumed\n8-byte prefix from a 6-byte UTF-16 target, wrapping u16 plen to 65534.\nThat underflow causes another overflow: memcpy() copies 65534 bytes\ninto a 24-byte buffer. A user with write access to a mounted share\ncan trigger these bugs with default settings.\n\nValidate the NT drive prefix, including an ASCII drive letter, before\naccessing fixed offsets or subtracting the prefix length.",
  "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-2026-98318"
  }, {
    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/23c240d9509e15f72e4112fc95f0160ab32ec430"
  }, {
    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/6913ff607c2bc8694193e1fcc40bf16d75f35f16"
  } ],
  "database_specific" : {
    "cwe_ids" : [ ],
    "severity" : "HIGH",
    "github_reviewed" : false,
    "github_reviewed_at" : null,
    "nvd_published_at" : "2026-10-06T09:18:23Z"
  }
}