CVE-2026-74598: Software Security Vulnerability Vulnerability

HIGH
Advisory Identifier: GHSA-vf8p-r5fr-wx72
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CVSS 7.5
Published
Advisory Summary

CVE-2026-74598 is a HIGH (CVSS 7.5) security vulnerability vulnerability (General Security Weakness) affecting Software libraries in the Maven ecosystem. Remediation is available in the latest vendor maintenance releases.

CVE-2026-74598 at a Glance

CVE Identifier CVE-2026-74598
GHSA Identifier GHSA-vf8p-r5fr-wx72
Severity HIGH
CVSS v3.1 Base Score 7.5
CWE Classification General Security Weakness
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:H/I:N/A:N).

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 None (I:N)
Availability None (A:N)

How to Fix CVE-2026-74598

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-2026-74598, 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: ipv6: fix Route Information option length validation rt6_route_rcv() validates the Route Information option (RFC 4191) length against the prefix length, but both checks are off by one. rinfo->length is the ND option length in units of 8 octets and it *includes* the 8-byte option header, so an option carrying N bytes of prefix has length == 1 + N/8. RFC 4191 section 2.3 requires length 3 when Prefix Length is greater than 64, and 2 or 3 when it is greater than 0. The code accepts length >= 2 and length >= 1 respectively. ipv6_addr_prefix() then copies prefix_len/8 bytes out of rinfo->prefix, so a Router Advertisement with (prefix_len=128, length=2) or (prefix_len=64, length=1) makes the kernel read up to 8 bytes past the end of the option. Those bytes end up in the prefix of the route that gets installed, so they are visible to userspace: # RA with a Route Information option (prefix_len=128, length=2) # followed by a source link-layer address option, 01 01 de ad be ef ca fe $ ip -6 route show 2001:db8:dead:beef:101:dead:beef:cafe via fe80::1234 dev veth0 proto ra ^^^^^^^^^^^^^^^^^^ the next option, read out of bounds When the Route Information option is the last one in the packet, those eight bytes come from the skb tail room instead. Reject the option lengths RFC 4191 does not allow.

References

NVD — CVE-2026-74598 NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-74598
git.kernel.org/stable/c/0b9e02f3bd... WEB
https://git.kernel.org/stable/c/0b9e02f3bd31c888f2ccdc0ca08e546d6abe9c4d
git.kernel.org/stable/c/2f6f94eda1... WEB
https://git.kernel.org/stable/c/2f6f94eda12430fb41b24b44a71e2ea4e93561d7
git.kernel.org/stable/c/3b2231e358... WEB
https://git.kernel.org/stable/c/3b2231e358d26e3aec5d8040b1fb777af03c5f05
git.kernel.org/stable/c/7309529f25... WEB
https://git.kernel.org/stable/c/7309529f257ae18e72112ef9f614edfd6df229bb
git.kernel.org/stable/c/7eac87396c... WEB
https://git.kernel.org/stable/c/7eac87396c44a312be457ef41d4c5687883be9a2
git.kernel.org/stable/c/d1ad8fb2ac... WEB
https://git.kernel.org/stable/c/d1ad8fb2ac6a1afb71dc22d9ae8efb4dda96c824
git.kernel.org/stable/c/da64ed1f34... WEB
https://git.kernel.org/stable/c/da64ed1f346ba84df574d6469fa2e422b2511719
git.kernel.org/stable/c/ff3cb05289... WEB
https://git.kernel.org/stable/c/ff3cb05289b8a4ef95fa7ea14c7d34818359edbb

Frequently Asked Questions

What is CVE-2026-74598?
CVE-2026-74598 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-2026-74598?
Upgrading to current release patches (or the latest patched release for your respective branch) resolves the vulnerability.
What is the CVSS score of CVE-2026-74598?
CVE-2026-74598 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:H/I:N/A:N.
What CWE is associated with CVE-2026-74598?
CVE-2026-74598 is classified under General Security Weakness.
How can I check Maven dependencies for CVE-2026-74598?
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-vf8p-r5fr-wx72",
  "modified" : "2026-08-25T06:31:21Z",
  "published" : "2026-08-22T18:30:26Z",
  "aliases" : [ "CVE-2026-74598" ],
  "details" : "In the Linux kernel, the following vulnerability has been resolved:\n\nipv6: fix Route Information option length validation\n\nrt6_route_rcv() validates the Route Information option (RFC 4191) length\nagainst the prefix length, but both checks are off by one.\n\nrinfo->length is the ND option length in units of 8 octets and it\n*includes* the 8-byte option header, so an option carrying N bytes of\nprefix has length == 1 + N/8.  RFC 4191 section 2.3 requires length 3\nwhen Prefix Length is greater than 64, and 2 or 3 when it is greater\nthan 0.  The code accepts length >= 2 and length >= 1 respectively.\n\nipv6_addr_prefix() then copies prefix_len/8 bytes out of rinfo->prefix,\nso a Router Advertisement with (prefix_len=128, length=2) or\n(prefix_len=64, length=1) makes the kernel read up to 8 bytes past the\nend of the option.  Those bytes end up in the prefix of the route that\ngets installed, so they are visible to userspace:\n\n  # RA with a Route Information option (prefix_len=128, length=2)\n  # followed by a source link-layer address option, 01 01 de ad be ef ca fe\n  $ ip -6 route show\n  2001:db8:dead:beef:101:dead:beef:cafe via fe80::1234 dev veth0 proto ra\n                     ^^^^^^^^^^^^^^^^^^ the next option, read out of bounds\n\nWhen the Route Information option is the last one in the packet, those\neight bytes come from the skb tail room instead.\n\nReject the option lengths RFC 4191 does not allow.",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N"
  } ],
  "affected" : [ ],
  "references" : [ {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2026-74598"
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    "url" : "https://git.kernel.org/stable/c/0b9e02f3bd31c888f2ccdc0ca08e546d6abe9c4d"
  }, {
    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/2f6f94eda12430fb41b24b44a71e2ea4e93561d7"
  }, {
    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/3b2231e358d26e3aec5d8040b1fb777af03c5f05"
  }, {
    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/7309529f257ae18e72112ef9f614edfd6df229bb"
  }, {
    "type" : "WEB",
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  }, {
    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/d1ad8fb2ac6a1afb71dc22d9ae8efb4dda96c824"
  }, {
    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/da64ed1f346ba84df574d6469fa2e422b2511719"
  }, {
    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/ff3cb05289b8a4ef95fa7ea14c7d34818359edbb"
  } ],
  "database_specific" : {
    "cwe_ids" : [ ],
    "severity" : "HIGH",
    "github_reviewed" : false,
    "github_reviewed_at" : null,
    "nvd_published_at" : "2026-08-22T16:16:32Z"
  }
}