CVE-2026-90110: Software Security Vulnerability Vulnerability

CRITICAL
Advisory Identifier: GHSA-cf89-f375-p3pc
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CVSS 9.4
Published
Advisory Summary

CVE-2026-90110 is a CRITICAL (CVSS 9.4) security vulnerability vulnerability (General Security Weakness) affecting Software libraries in the Maven ecosystem. Remediation is available in the latest vendor maintenance releases.

CVE-2026-90110 at a Glance

CVE Identifier CVE-2026-90110
GHSA Identifier GHSA-cf89-f375-p3pc
Severity CRITICAL
CVSS v3.1 Base Score 9.4
CWE Classification General Security Weakness
Affected Product Software
Package Ecosystem Maven
Published Date
Last Updated

Security Impact

CVSS: 9.4

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:H/I:H/A:L).

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 High (C:H)
Integrity High (I:H)
Availability Low (A:L)

How to Fix CVE-2026-90110

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-2026-90110, 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: inetpeer: randomize RB-tree node comparison using SipHash The inetpeer rate limiting system stores peer entries in a Red-Black tree keyed deterministically on the remote IP address. Because tree lookups walk the RB-tree using standard lexicographical comparisons (inetpeer_addr_cmp), an off-path adversary can predict the exact topology of the tree and the sequence of nodes traversed during lookups (the gc_stack candidate list). By combining deterministic tree traversal with aggressive garbage collection (triggered when tree size exceeds inet_peer_threshold), an attacker can selectively force the eviction of targeted inet_peer nodes. When an evicted node is subsequently re-created upon receiving a new packet, its rate-limiting token bucket (rate_tokens, rate_last) is reset to full capacity. This creates a side-channel primitive allowing off-path attackers to bypass IP-keyed ICMP rate limits and infer open UDP ports (similar to SAD DNS style attacks). Mitigate this by randomizing the RB-tree node comparison logic using SipHash with a secret key (inetpeer_hash_key) initialized via net_get_random_once(). Nodes are ordered in the tree by SipHash(addr, key) rather than raw IP addresses. Because the secret key is unknown to external entities, the tree layout and lookup traversal paths are unpredictable to off-path adversaries, breaking the deterministic eviction gadget. Cache the computed 64-bit SipHash (hash) in struct inet_peer and compute the target hash (dhash) once at the beginning of inet_getpeer() to avoid recomputing SipHash at every step of the RB-tree walk.

References

NVD — CVE-2026-90110 NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-90110
git.kernel.org/stable/c/199fcf285e... WEB
https://git.kernel.org/stable/c/199fcf285e498111e029137d088949bc6c26d578
git.kernel.org/stable/c/2ee66e9487... WEB
https://git.kernel.org/stable/c/2ee66e9487172fcd189bc52a767c30dad7141c09
git.kernel.org/stable/c/5f127e3cc9... WEB
https://git.kernel.org/stable/c/5f127e3cc9647a8a70db12c65dbd0de473545380
git.kernel.org/stable/c/7109bb6366... WEB
https://git.kernel.org/stable/c/7109bb63667a53e4542ad845476f97d0c8b28a61
git.kernel.org/stable/c/857681f683... WEB
https://git.kernel.org/stable/c/857681f6835d5b0a7bc4a34a026baeaaf5215623
git.kernel.org/stable/c/b20e98f0bb... WEB
https://git.kernel.org/stable/c/b20e98f0bb668a59abaf7bcf85d75c073e90d352

Frequently Asked Questions

What is CVE-2026-90110?
CVE-2026-90110 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-2026-90110?
Upgrading to current release patches (or the latest patched release for your respective branch) resolves the vulnerability.
What is the CVSS score of CVE-2026-90110?
CVE-2026-90110 has a CVSS v3.1 base score of 9.4 (CRITICAL) with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:L.
What CWE is associated with CVE-2026-90110?
CVE-2026-90110 is classified under General Security Weakness.
How can I check Maven dependencies for CVE-2026-90110?
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-cf89-f375-p3pc",
  "modified" : "2026-09-18T18:31:27Z",
  "published" : "2026-09-17T18:31:51Z",
  "aliases" : [ "CVE-2026-90110" ],
  "details" : "In the Linux kernel, the following vulnerability has been resolved:\n\ninetpeer: randomize RB-tree node comparison using SipHash\n\nThe inetpeer rate limiting system stores peer entries in a Red-Black tree\nkeyed deterministically on the remote IP address. Because tree lookups walk\nthe RB-tree using standard lexicographical comparisons (inetpeer_addr_cmp),\nan off-path adversary can predict the exact topology of the tree and the\nsequence of nodes traversed during lookups (the gc_stack candidate list).\n\nBy combining deterministic tree traversal with aggressive garbage collection\n(triggered when tree size exceeds inet_peer_threshold), an attacker can\nselectively force the eviction of targeted inet_peer nodes. When an evicted\nnode is subsequently re-created upon receiving a new packet, its rate-limiting\ntoken bucket (rate_tokens, rate_last) is reset to full capacity. This creates\na side-channel primitive allowing off-path attackers to bypass IP-keyed ICMP\nrate limits and infer open UDP ports (similar to SAD DNS style attacks).\n\nMitigate this by randomizing the RB-tree node comparison logic using SipHash\nwith a secret key (inetpeer_hash_key) initialized via net_get_random_once().\nNodes are ordered in the tree by SipHash(addr, key) rather than raw IP\naddresses. Because the secret key is unknown to external entities, the tree\nlayout and lookup traversal paths are unpredictable to off-path adversaries,\nbreaking the deterministic eviction gadget.\n\nCache the computed 64-bit SipHash (hash) in struct inet_peer and compute the\ntarget hash (dhash) once at the beginning of inet_getpeer() to avoid recomputing\nSipHash at every step of the RB-tree walk.",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:L"
  } ],
  "affected" : [ ],
  "references" : [ {
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  }, {
    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/2ee66e9487172fcd189bc52a767c30dad7141c09"
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    "url" : "https://git.kernel.org/stable/c/857681f6835d5b0a7bc4a34a026baeaaf5215623"
  }, {
    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/b20e98f0bb668a59abaf7bcf85d75c073e90d352"
  } ],
  "database_specific" : {
    "cwe_ids" : [ ],
    "severity" : "CRITICAL",
    "github_reviewed" : false,
    "github_reviewed_at" : null,
    "nvd_published_at" : "2026-09-17T17:17:02Z"
  }
}