CVE-2026-31662: Software Security Vulnerability Vulnerability

HIGH
Advisory Identifier: GHSA-895h-4xx6-r95p
Share
CVSS 7.5
CWE-190 CWE-191
Published
Advisory Summary

CVE-2026-31662 is a HIGH (CVSS 7.5) security vulnerability vulnerability (CWE-190: Integer Overflow or Wraparound) affecting Software libraries in the Maven ecosystem. The weakness occurs when the product performs a calculation that can produce an integer overflow or wraparound when the logic assumes that the resulting value will always be larger than the original value. this occurs when an integer value is incremented to a value that is too large to store in the associated representation. when this occurs, the value may become a very small or negative number.. Remediation is available in the latest vendor maintenance releases.

CVE-2026-31662 at a Glance

CVE Identifier CVE-2026-31662
GHSA Identifier GHSA-895h-4xx6-r95p
Severity HIGH
CVSS v3.1 Base Score 7.5
CWE Classification CWE-190: Integer Overflow or Wraparound
Affected Product Software
Package Ecosystem Maven
Published Date
Last Updated

Security Impact

CVSS: 7.5

The security impact metrics below are parsed directly from the CVSS v3.1 vector string (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H).

Attack Vector Network (AV:N)
Attack Complexity Low (AC:L)
Privileges Required None (PR:N)
User Interaction None (UI:N)
Scope Unchanged (S:U)
Confidentiality None (C:N)
Integrity None (I:N)
Availability High (A:H)

How to Fix CVE-2026-31662

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-2026-31662, 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-190: Integer Overflow or Wraparound, where the product performs a calculation that can produce an integer overflow or wraparound when the logic assumes that the resulting value will always be larger than the original value. this occurs when an integer value is incremented to a value that is too large to store in the associated representation. when this occurs, the value may become a very small or negative number. 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: tipc: fix bc_ackers underflow on duplicate GRP_ACK_MSG The GRP_ACK_MSG handler in tipc_group_proto_rcv() currently decrements bc_ackers on every inbound group ACK, even when the same member has already acknowledged the current broadcast round. Because bc_ackers is a u16, a duplicate ACK received after the last legitimate ACK wraps the counter to 65535. Once wrapped, tipc_group_bc_cong() keeps reporting congestion and later group broadcasts on the affected socket stay blocked until the group is recreated. Fix this by ignoring duplicate or stale ACKs before touching bc_acked or bc_ackers. This makes repeated GRP_ACK_MSG handling idempotent and prevents the underflow path.

References

NVD — CVE-2026-31662 NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-31662
git.kernel.org/stable/c/1b6f13f626... WEB
https://git.kernel.org/stable/c/1b6f13f626665cac67ba5a012765427680518711
git.kernel.org/stable/c/36ec4fdd62... WEB
https://git.kernel.org/stable/c/36ec4fdd6250dcd5e73eb09ea92ed92e9cc28412
git.kernel.org/stable/c/3bcf7aca63... WEB
https://git.kernel.org/stable/c/3bcf7aca63f0bcd679ae28e9b99823c608e59ce3
git.kernel.org/stable/c/48a5fe3877... WEB
https://git.kernel.org/stable/c/48a5fe38772b6f039522469ee6131a67838221a8
git.kernel.org/stable/c/575faea557... WEB
https://git.kernel.org/stable/c/575faea557f1a184a5f09661bd47ebd3ef3769f8
git.kernel.org/stable/c/a2ea1ef016... WEB
https://git.kernel.org/stable/c/a2ea1ef0167d7a84730638d05c20ccdc421b14b6
git.kernel.org/stable/c/a7db57ccca... WEB
https://git.kernel.org/stable/c/a7db57ccca21f5801609065473c89a38229ecb92
git.kernel.org/stable/c/e0bb732eaf... WEB
https://git.kernel.org/stable/c/e0bb732eaf77f9ac2f2638bdac9e39b81e0a9682

Frequently Asked Questions

What is CVE-2026-31662?
CVE-2026-31662 is a security vulnerability in Software classified as a security vulnerability vulnerability under CWE-190: Integer Overflow or Wraparound.
Which Software versions are affected?
Affected versions include releases prior to current release patches.
What version fixes CVE-2026-31662?
Upgrading to current release patches (or the latest patched release for your respective branch) resolves the vulnerability.
What is the CVSS score of CVE-2026-31662?
CVE-2026-31662 has a CVSS v3.1 base score of 7.5 (HIGH) with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.
What CWE is associated with CVE-2026-31662?
CVE-2026-31662 is classified under CWE-190: Integer Overflow or Wraparound (The product performs a calculation that can produce an integer overflow or wraparound when the logic assumes that the resulting value will always be larger than the original value. This occurs when an integer value is incremented to a value that is too large to store in the associated representation. When this occurs, the value may become a very small or negative number.).
How can I check Maven dependencies for CVE-2026-31662?
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-895h-4xx6-r95p",
  "modified" : "2026-04-27T15:30:46Z",
  "published" : "2026-04-24T15:32:37Z",
  "aliases" : [ "CVE-2026-31662" ],
  "details" : "In the Linux kernel, the following vulnerability has been resolved:\n\ntipc: fix bc_ackers underflow on duplicate GRP_ACK_MSG\n\nThe GRP_ACK_MSG handler in tipc_group_proto_rcv() currently decrements\nbc_ackers on every inbound group ACK, even when the same member has\nalready acknowledged the current broadcast round.\n\nBecause bc_ackers is a u16, a duplicate ACK received after the last\nlegitimate ACK wraps the counter to 65535. Once wrapped,\ntipc_group_bc_cong() keeps reporting congestion and later group\nbroadcasts on the affected socket stay blocked until the group is\nrecreated.\n\nFix this by ignoring duplicate or stale ACKs before touching bc_acked or\nbc_ackers. This makes repeated GRP_ACK_MSG handling idempotent and\nprevents the underflow path.",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"
  } ],
  "affected" : [ ],
  "references" : [ {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2026-31662"
  }, {
    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/1b6f13f626665cac67ba5a012765427680518711"
  }, {
    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/36ec4fdd6250dcd5e73eb09ea92ed92e9cc28412"
  }, {
    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/3bcf7aca63f0bcd679ae28e9b99823c608e59ce3"
  }, {
    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/48a5fe38772b6f039522469ee6131a67838221a8"
  }, {
    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/575faea557f1a184a5f09661bd47ebd3ef3769f8"
  }, {
    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/a2ea1ef0167d7a84730638d05c20ccdc421b14b6"
  }, {
    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/a7db57ccca21f5801609065473c89a38229ecb92"
  }, {
    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/e0bb732eaf77f9ac2f2638bdac9e39b81e0a9682"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-190", "CWE-191" ],
    "severity" : "HIGH",
    "github_reviewed" : false,
    "github_reviewed_at" : null,
    "nvd_published_at" : "2026-04-24T15:16:45Z"
  }
}