CVE-2026-74666: Software Security Vulnerability Vulnerability

HIGH
Advisory Identifier: GHSA-qv67-9r8f-5pqx
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CVSS 7.8
Published
Advisory Summary

CVE-2026-74666 is a HIGH (CVSS 7.8) security vulnerability vulnerability (General Security Weakness) affecting Software libraries in the Maven ecosystem. Remediation is available in the latest vendor maintenance releases.

CVE-2026-74666 at a Glance

CVE Identifier CVE-2026-74666
GHSA Identifier GHSA-qv67-9r8f-5pqx
Severity HIGH
CVSS v3.1 Base Score 7.8
CWE Classification General Security Weakness
Affected Product Software
Package Ecosystem Maven
Published Date
Last Updated

Security Impact

CVSS: 7.8

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

Attack Vector Local (AV:L)
Attack Complexity Low (AC:L)
Privileges Required Low (PR:L)
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-2026-74666

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-2026-74666, 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: packet: synchronize pressure clearing with ring reconfiguration packet_set_ring() updates the RX ring state under sk_receive_queue.lock, but used to publish the tpacket receive mode through po->prot_hook.func after releasing that lock. packet_poll() and packet_recvmsg() can then run the pressure clearing path after the ring has been cleared while still seeing tpacket_rcv, causing __packet_rcv_has_room() to dereference stale or NULL ring storage. Move the existing receive hook assignment into the same sk_receive_queue.lock section as the ring state update. Keep the assignment otherwise unchanged, including on TX ring reconfiguration, to avoid adding behavior changes that are not required for the fix. Serialize packet_recvmsg() pressure clearing with the same queue lock only after PACKET_SOCK_PRESSURE has been observed. If the flag is clear and the socket has moved away from tpacket_rcv, packet_set_ring() has already detached the socket and waited for synchronize_net(), so no new packet input can set the flag again. packet_poll() already holds sk_receive_queue.lock, so it uses the new unlocked helper directly.

References

NVD — CVE-2026-74666 NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-74666
git.kernel.org/stable/c/1a35da325c... WEB
https://git.kernel.org/stable/c/1a35da325cac4d5bcad76a2aa943408a6f1d9000
git.kernel.org/stable/c/2c7b5eb87b... WEB
https://git.kernel.org/stable/c/2c7b5eb87b2b288cdbde825f21d2b83b2f5da747
git.kernel.org/stable/c/8cfb2e7192... WEB
https://git.kernel.org/stable/c/8cfb2e71926a682f36c4240067d424074dd8f70f
git.kernel.org/stable/c/a08196c3cc... WEB
https://git.kernel.org/stable/c/a08196c3cc105947746ec21309edfbb60275fcdb
git.kernel.org/stable/c/ad740b4990... WEB
https://git.kernel.org/stable/c/ad740b4990347521f0db260d381f9f74e7b340ba
git.kernel.org/stable/c/bf3c8e86bc... WEB
https://git.kernel.org/stable/c/bf3c8e86bc8ad111be3f3136125e255344bcb3da
git.kernel.org/stable/c/cf8189b82b... WEB
https://git.kernel.org/stable/c/cf8189b82bb93f219ab740e0346c919ad65ada62
git.kernel.org/stable/c/f015c9de92... WEB
https://git.kernel.org/stable/c/f015c9de92b731814059a343b765c60c0196225c

Frequently Asked Questions

What is CVE-2026-74666?
CVE-2026-74666 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-2026-74666?
Upgrading to current release patches (or the latest patched release for your respective branch) resolves the vulnerability.
What is the CVSS score of CVE-2026-74666?
CVE-2026-74666 has a CVSS v3.1 base score of 7.8 (HIGH) with vector string CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.
What CWE is associated with CVE-2026-74666?
CVE-2026-74666 is classified under General Security Weakness.
How can I check Maven dependencies for CVE-2026-74666?
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-qv67-9r8f-5pqx",
  "modified" : "2026-08-27T15:31:31Z",
  "published" : "2026-08-22T18:30:28Z",
  "aliases" : [ "CVE-2026-74666" ],
  "details" : "In the Linux kernel, the following vulnerability has been resolved:\n\npacket: synchronize pressure clearing with ring reconfiguration\n\npacket_set_ring() updates the RX ring state under sk_receive_queue.lock,\nbut used to publish the tpacket receive mode through po->prot_hook.func\nafter releasing that lock. packet_poll() and packet_recvmsg() can then\nrun the pressure clearing path after the ring has been cleared while\nstill seeing tpacket_rcv, causing __packet_rcv_has_room() to dereference\nstale or NULL ring storage.\n\nMove the existing receive hook assignment into the same\nsk_receive_queue.lock section as the ring state update. Keep the\nassignment otherwise unchanged, including on TX ring reconfiguration, to\navoid adding behavior changes that are not required for the fix.\n\nSerialize packet_recvmsg() pressure clearing with the same queue lock\nonly after PACKET_SOCK_PRESSURE has been observed. If the flag is clear\nand the socket has moved away from tpacket_rcv, packet_set_ring() has\nalready detached the socket and waited for synchronize_net(), so no new\npacket input can set the flag again.\n\npacket_poll() already holds sk_receive_queue.lock, so it uses the new\nunlocked helper directly.",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H"
  } ],
  "affected" : [ ],
  "references" : [ {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2026-74666"
  }, {
    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/1a35da325cac4d5bcad76a2aa943408a6f1d9000"
  }, {
    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/2c7b5eb87b2b288cdbde825f21d2b83b2f5da747"
  }, {
    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/8cfb2e71926a682f36c4240067d424074dd8f70f"
  }, {
    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/a08196c3cc105947746ec21309edfbb60275fcdb"
  }, {
    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/ad740b4990347521f0db260d381f9f74e7b340ba"
  }, {
    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/bf3c8e86bc8ad111be3f3136125e255344bcb3da"
  }, {
    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/cf8189b82bb93f219ab740e0346c919ad65ada62"
  }, {
    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/f015c9de92b731814059a343b765c60c0196225c"
  } ],
  "database_specific" : {
    "cwe_ids" : [ ],
    "severity" : "HIGH",
    "github_reviewed" : false,
    "github_reviewed_at" : null,
    "nvd_published_at" : "2026-08-22T16:16:40Z"
  }
}