CVE-2026-89784: Software Security Vulnerability Vulnerability

UNKNOWN
Advisory Identifier: GHSA-8jpc-3w39-9jvg
Share
Published
Advisory Summary

CVE-2026-89784 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-2026-89784 at a Glance

CVE Identifier CVE-2026-89784
GHSA Identifier GHSA-8jpc-3w39-9jvg
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-2026-89784

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-2026-89784, 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: SUNRPC: check rpc_sockaddr2uaddr() return value in rpcb_register_inet4/6 rpcb_register_inet4() and rpcb_register_inet6() store the result of rpc_sockaddr2uaddr() into map->r_addr without checking it for NULL. rpc_sockaddr2uaddr() returns NULL when its final kstrdup() fails, and the unchecked NULL is then carried into the synchronous RPCBPROC_SET encode path: rpcb_register_call() -> rpc_call_sync() -> rpcb_enc_getaddr() -> encode_rpcb_string(), whose first statement is strlen(string), dereferencing NULL and oopsing the kernel. The crash reproduces under failslab on v6.12; with KASAN the NULL dereference surfaces as a fault on the shadow of address zero: Oops: general protection fault, probably for non-canonical address 0xdffffc0000000000 [#1] PREEMPT SMP KASAN RIP: 0010:strlen (lib/string.c:409) Call Trace: encode_rpcb_string (net/sunrpc/rpcb_clnt.c:890) rpcb_enc_getaddr (net/sunrpc/rpcb_clnt.c:910) rpcauth_wrap_req_encode (net/sunrpc/auth.c:745) call_encode (net/sunrpc/clnt.c:1966) __rpc_execute (net/sunrpc/sched.c:952) rpc_run_task (net/sunrpc/clnt.c:1243) rpc_call_sync (net/sunrpc/clnt.c:1272) rpcb_v4_register (net/sunrpc/rpcb_clnt.c:500) svc_generic_rpcbind_set nfsd_rpcbind_set svc_register svc_setup_socket svc_addsock write_ports nfsctl_transaction_write vfs_write The crash is reachable when an in-kernel RPC service (nfsd, lockd, nfs-callback) registers with the local rpcbind under enough memory pressure for the small GFP_KERNEL kstrdup() in rpc_sockaddr2uaddr() to fail. The asynchronous getport path already handles this exact failure mode by returning -ENOMEM; only the two register helpers omit the check. Mirror that handling: bail out with -ENOMEM when rpc_sockaddr2uaddr() returns NULL, before the address is fed into the encoder.

References

NVD — CVE-2026-89784 NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-89784
git.kernel.org/stable/c/04441b792e... WEB
https://git.kernel.org/stable/c/04441b792ec40eb66349b5fab34b6a2090b5b2dd
git.kernel.org/stable/c/12bf3e0182... WEB
https://git.kernel.org/stable/c/12bf3e0182ccdaf3b412756a756d3944a7dacaa9
git.kernel.org/stable/c/4a6095de8c... WEB
https://git.kernel.org/stable/c/4a6095de8cb1858e05bdf70b3e7d6d7645c25041
git.kernel.org/stable/c/4e01022974... WEB
https://git.kernel.org/stable/c/4e01022974355732e748ec8ebc97c558cb624ffe
git.kernel.org/stable/c/5a51c49ddb... WEB
https://git.kernel.org/stable/c/5a51c49ddb37b883566874aecc66bc5a2e617a96
git.kernel.org/stable/c/cda4aacfb0... WEB
https://git.kernel.org/stable/c/cda4aacfb0bbf5c0f90fd0b42c72c749635d1368
git.kernel.org/stable/c/eb476289c1... WEB
https://git.kernel.org/stable/c/eb476289c12cc22c8766f8a84eeb7ab46c4e8fb6
git.kernel.org/stable/c/fd22370226... WEB
https://git.kernel.org/stable/c/fd22370226a0d8109045d0831fd5aaadee921693

Frequently Asked Questions

What is CVE-2026-89784?
CVE-2026-89784 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-2026-89784?
Upgrading to current release patches (or the latest patched release for your respective branch) resolves the vulnerability.
What CWE is associated with CVE-2026-89784?
CVE-2026-89784 is classified under General Security Weakness.
How can I check Maven dependencies for CVE-2026-89784?
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-8jpc-3w39-9jvg",
  "modified" : "2026-09-16T09:30:30Z",
  "published" : "2026-09-16T09:30:30Z",
  "aliases" : [ "CVE-2026-89784" ],
  "details" : "In the Linux kernel, the following vulnerability has been resolved:\n\nSUNRPC: check rpc_sockaddr2uaddr() return value in rpcb_register_inet4/6\n\nrpcb_register_inet4() and rpcb_register_inet6() store the result of\nrpc_sockaddr2uaddr() into map->r_addr without checking it for NULL.\nrpc_sockaddr2uaddr() returns NULL when its final kstrdup() fails, and\nthe unchecked NULL is then carried into the synchronous RPCBPROC_SET\nencode path: rpcb_register_call() -> rpc_call_sync() ->\nrpcb_enc_getaddr() -> encode_rpcb_string(), whose first statement is\nstrlen(string), dereferencing NULL and oopsing the kernel.\n\nThe crash reproduces under failslab on v6.12; with KASAN the NULL\ndereference surfaces as a fault on the shadow of address zero:\n\n Oops: general protection fault, probably for non-canonical address\n       0xdffffc0000000000 [#1] PREEMPT SMP KASAN\n RIP: 0010:strlen (lib/string.c:409)\n Call Trace:\n  encode_rpcb_string (net/sunrpc/rpcb_clnt.c:890)\n  rpcb_enc_getaddr (net/sunrpc/rpcb_clnt.c:910)\n  rpcauth_wrap_req_encode (net/sunrpc/auth.c:745)\n  call_encode (net/sunrpc/clnt.c:1966)\n  __rpc_execute (net/sunrpc/sched.c:952)\n  rpc_run_task (net/sunrpc/clnt.c:1243)\n  rpc_call_sync (net/sunrpc/clnt.c:1272)\n  rpcb_v4_register (net/sunrpc/rpcb_clnt.c:500)\n  svc_generic_rpcbind_set\n  nfsd_rpcbind_set\n  svc_register\n  svc_setup_socket\n  svc_addsock\n  write_ports\n  nfsctl_transaction_write\n  vfs_write\n\nThe crash is reachable when an in-kernel RPC service (nfsd, lockd,\nnfs-callback) registers with the local rpcbind under enough memory\npressure for the small GFP_KERNEL kstrdup() in rpc_sockaddr2uaddr() to\nfail. The asynchronous getport path already handles this exact failure\nmode by returning -ENOMEM; only the two register helpers omit the check.\n\nMirror that handling: bail out with -ENOMEM when rpc_sockaddr2uaddr()\nreturns NULL, before the address is fed into the encoder.",
  "severity" : [ ],
  "affected" : [ ],
  "references" : [ {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2026-89784"
  }, {
    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/04441b792ec40eb66349b5fab34b6a2090b5b2dd"
  }, {
    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/12bf3e0182ccdaf3b412756a756d3944a7dacaa9"
  }, {
    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/4a6095de8cb1858e05bdf70b3e7d6d7645c25041"
  }, {
    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/4e01022974355732e748ec8ebc97c558cb624ffe"
  }, {
    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/5a51c49ddb37b883566874aecc66bc5a2e617a96"
  }, {
    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/cda4aacfb0bbf5c0f90fd0b42c72c749635d1368"
  }, {
    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/eb476289c12cc22c8766f8a84eeb7ab46c4e8fb6"
  }, {
    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/fd22370226a0d8109045d0831fd5aaadee921693"
  } ],
  "database_specific" : {
    "cwe_ids" : [ ],
    "severity" : null,
    "github_reviewed" : false,
    "github_reviewed_at" : null,
    "nvd_published_at" : "2026-09-16T09:17:09Z"
  }
}