CVE-2026-74589: Software Security Vulnerability Vulnerability

HIGH

Advisory Identifier: GHSA-h943-r25q-4c77

CVSS 8.4

Published 2026-08-22

Advisory Summary

CVE-2026-74589 is a HIGH (CVSS 8.4) security vulnerability vulnerability (General Security Weakness) affecting Software libraries in the Maven ecosystem. Remediation is available in the latest vendor maintenance releases.

CVE-2026-74589 at a Glance

CVE Identifier CVE-2026-74589

GHSA Identifier GHSA-h943-r25q-4c77

Severity HIGH

CVSS v3.1 Base Score 8.4

CWE Classification General Security Weakness

Affected Product Software

Package Ecosystem Maven

Published Date 2026-08-22

Last Updated 2026-08-25

Security Impact

CVSS: 8.4

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

Attack Vector Local (AV:L)

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 High (A:H)

How to Fix CVE-2026-74589

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-2026-74589, 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: bpf, sockmap: Fix sk_redir use-after-free in send verdict sk_psock_msg_verdict() takes a socket reference for psock->sk_redir. tcp_bpf_send_verdict() copies that pointer while holding the source socket lock, but does not take a reference for the local copy before dropping the lock around tcp_bpf_sendmsg_redir(). When apply_bytes keeps the cached verdict active, another sendmsg() on the same source socket can consume the remaining bytes and release the cached reference while the first thread still holds only the raw local pointer: CPU 0 CPU 1 sk_redir = psock->sk_redir apply_bytes remains nonzero release_sock(sk) lock_sock(sk) apply_bytes reaches zero psock->sk_redir = NULL release_sock(sk) tcp_bpf_sendmsg_redir(sk_redir) sock_put(sk_redir) tcp_bpf_sendmsg_redir(sk_redir) The final sock_put() can free sk_redir before CPU 0 dereferences it. KASAN reported: BUG: KASAN: slab-use-after-free in tcp_bpf_sendmsg_redir+0xf39/0x1020 Read of size 8 at addr ffff888108537090 by task poc/87 Call Trace: tcp_bpf_sendmsg_redir+0xf39/0x1020 tcp_bpf_sendmsg+0x977/0x1a50 __sys_sendto+0x32c/0x3a0 __x64_sys_sendto+0xdb/0x1b0 Allocated by task 85: sk_prot_alloc+0x56/0x210 sk_clone+0x6f/0x14b0 inet_csk_clone_lock+0x24/0x740 tcp_create_openreq_child+0x25/0x2710 tcp_v4_syn_recv_sock+0x10a/0xe00 Freed by task 0: __kasan_slab_free+0x43/0x70 slab_free_after_rcu_debug+0xa6/0x1e0 rcu_core+0x50a/0x1850 Last potentially related work creation: __sk_destruct+0x3da/0x540 sk_psock_destroy+0x81e/0xab0 process_one_work+0x63a/0x1070 Take a temporary socket reference while the source socket lock still protects psock->sk_redir, and drop it after tcp_bpf_sendmsg_redir() returns. This keeps each unlocked use independent of cached-verdict ownership.

References

NVD — CVE-2026-74589 NVD

https://nvd.nist.gov/vuln/detail/CVE-2026-74589

git.kernel.org/stable/c/1cec526cf0... WEB

https://git.kernel.org/stable/c/1cec526cf0a2227395f2c2f4b671cb052ff0b00e

git.kernel.org/stable/c/41b7da0cb7... WEB

https://git.kernel.org/stable/c/41b7da0cb72ca5aa1e62b68dab323d0791fc6bdf

git.kernel.org/stable/c/4c9d9aa809... WEB

https://git.kernel.org/stable/c/4c9d9aa809c261dc0490a0e19d675f7e8e4c85bf

git.kernel.org/stable/c/90a19b0894... WEB

https://git.kernel.org/stable/c/90a19b0894ba79a699b48cf44421b36fbd566e99

git.kernel.org/stable/c/9b4fbc371a... WEB

https://git.kernel.org/stable/c/9b4fbc371a6ecf1b4e43b5a629015cc0830d8de3

git.kernel.org/stable/c/a14e4ef1d9... WEB

https://git.kernel.org/stable/c/a14e4ef1d90c3418f01b3b6b8fd3a40a0a208a10

git.kernel.org/stable/c/a766247337... WEB

https://git.kernel.org/stable/c/a76624733730e541e4955fdecf506af2f6b20558

git.kernel.org/stable/c/d192cff2a3... WEB

https://git.kernel.org/stable/c/d192cff2a37d59206dabe6ec2e60ceac6271f274

Frequently Asked Questions

What is CVE-2026-74589?

CVE-2026-74589 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-2026-74589?

Upgrading to current release patches (or the latest patched release for your respective branch) resolves the vulnerability.

What is the CVSS score of CVE-2026-74589?

CVE-2026-74589 has a CVSS v3.1 base score of 8.4 (HIGH) with vector string CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

What CWE is associated with CVE-2026-74589?

CVE-2026-74589 is classified under General Security Weakness.

How can I check Maven dependencies for CVE-2026-74589?

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-h943-r25q-4c77",
  "modified" : "2026-08-25T06:31:21Z",
  "published" : "2026-08-22T18:30:25Z",
  "aliases" : [ "CVE-2026-74589" ],
  "details" : "In the Linux kernel, the following vulnerability has been resolved:\n\nbpf, sockmap: Fix sk_redir use-after-free in send verdict\n\nsk_psock_msg_verdict() takes a socket reference for psock->sk_redir.\ntcp_bpf_send_verdict() copies that pointer while holding the source socket\nlock, but does not take a reference for the local copy before dropping the\nlock around tcp_bpf_sendmsg_redir().\n\nWhen apply_bytes keeps the cached verdict active, another sendmsg() on the\nsame source socket can consume the remaining bytes and release the cached\nreference while the first thread still holds only the raw local pointer:\n\n  CPU 0                                  CPU 1\n  sk_redir = psock->sk_redir\n  apply_bytes remains nonzero\n  release_sock(sk)\n                                         lock_sock(sk)\n                                         apply_bytes reaches zero\n                                         psock->sk_redir = NULL\n                                         release_sock(sk)\n                                         tcp_bpf_sendmsg_redir(sk_redir)\n                                         sock_put(sk_redir)\n  tcp_bpf_sendmsg_redir(sk_redir)\n\nThe final sock_put() can free sk_redir before CPU 0 dereferences it.\n\nKASAN reported:\n\n  BUG: KASAN: slab-use-after-free in tcp_bpf_sendmsg_redir+0xf39/0x1020\n  Read of size 8 at addr ffff888108537090 by task poc/87\n  Call Trace:\n   tcp_bpf_sendmsg_redir+0xf39/0x1020\n   tcp_bpf_sendmsg+0x977/0x1a50\n   __sys_sendto+0x32c/0x3a0\n   __x64_sys_sendto+0xdb/0x1b0\n  Allocated by task 85:\n   sk_prot_alloc+0x56/0x210\n   sk_clone+0x6f/0x14b0\n   inet_csk_clone_lock+0x24/0x740\n   tcp_create_openreq_child+0x25/0x2710\n   tcp_v4_syn_recv_sock+0x10a/0xe00\n  Freed by task 0:\n   __kasan_slab_free+0x43/0x70\n   slab_free_after_rcu_debug+0xa6/0x1e0\n   rcu_core+0x50a/0x1850\n  Last potentially related work creation:\n   __sk_destruct+0x3da/0x540\n   sk_psock_destroy+0x81e/0xab0\n   process_one_work+0x63a/0x1070\n\nTake a temporary socket reference while the source socket lock still\nprotects psock->sk_redir, and drop it after tcp_bpf_sendmsg_redir()\nreturns.  This keeps each unlocked use independent of cached-verdict\nownership.",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H"
  } ],
  "affected" : [ ],
  "references" : [ {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2026-74589"
  }, {
    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/1cec526cf0a2227395f2c2f4b671cb052ff0b00e"
  }, {
    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/41b7da0cb72ca5aa1e62b68dab323d0791fc6bdf"
  }, {
    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/4c9d9aa809c261dc0490a0e19d675f7e8e4c85bf"
  }, {
    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/90a19b0894ba79a699b48cf44421b36fbd566e99"
  }, {
    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/9b4fbc371a6ecf1b4e43b5a629015cc0830d8de3"
  }, {
    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/a14e4ef1d90c3418f01b3b6b8fd3a40a0a208a10"
  }, {
    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/a76624733730e541e4955fdecf506af2f6b20558"
  }, {
    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/d192cff2a37d59206dabe6ec2e60ceac6271f274"
  } ],
  "database_specific" : {
    "cwe_ids" : [ ],
    "severity" : "HIGH",
    "github_reviewed" : false,
    "github_reviewed_at" : null,
    "nvd_published_at" : "2026-08-22T16:16:31Z"
  }
}

CVSS V3

8.4 HIGH