CVE-2026-74667: Software Security Vulnerability Vulnerability

HIGH
Advisory Identifier: GHSA-wqmr-77rq-877r
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CVSS 7.8
Published
Advisory Summary

CVE-2026-74667 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-2026-74667 at a Glance

CVE Identifier CVE-2026-74667
GHSA Identifier GHSA-wqmr-77rq-877r
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-2026-74667

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-2026-74667, 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: net/packet: reset the MAC header on the packet-socket transmit path packet_parse_headers() resets the MAC header only for a SOCK_RAW frame whose socket did not bind a protocol. A protocol-bound SOCK_RAW socket, any SOCK_DGRAM frame, and the legacy SOCK_PACKET path therefore leave skb->mac_header unset here. For frames sent via __dev_queue_xmit() this is harmless: it resets the MAC header unconditionally. But the packet-socket PACKET_QDISC_BYPASS path uses dev_direct_xmit(), which does not, so the frame reaches ndo_start_xmit() with the MAC header unset. A driver that reads eth_hdr(skb) on transmit then dereferences skb->head + (u16)~0, an out-of-bounds access ~64 KiB past the head -- the same class fixed for one consumer in commit f5089008f90c ("macsec: do not read an unset MAC header in macsec_encrypt()"). packet_parse_headers() runs only on the transmit path, where skb->data points at the start of the L2 header for every packet-socket type regardless of its length: SOCK_RAW and SOCK_PACKET carry a user-supplied header and SOCK_DGRAM has one built by dev_hard_header(). Reset the MAC header unconditionally, mirroring __dev_queue_xmit(), so the frame is anchored on the bypass path too. Found by 0sec (https://0sec.ai) using automated source analysis; verified against source and matched to the macsec KASAN report in f5089008f90c. Compile-tested.

References

NVD — CVE-2026-74667 NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-74667
git.kernel.org/stable/c/1e43a1d666... WEB
https://git.kernel.org/stable/c/1e43a1d66615f411d427f9df1f46dd049d9e3681
git.kernel.org/stable/c/2610ed4e86... WEB
https://git.kernel.org/stable/c/2610ed4e86a4590234a9d70518c469751c5af231
git.kernel.org/stable/c/284f3e7a3f... WEB
https://git.kernel.org/stable/c/284f3e7a3f1a743fdf89e304fd1f19d5ffcff46d
git.kernel.org/stable/c/4057853a91... WEB
https://git.kernel.org/stable/c/4057853a91fb796c4f47c7d1baf1aa085394148e
git.kernel.org/stable/c/971aa7d992... WEB
https://git.kernel.org/stable/c/971aa7d99242bbf09513e27b7a243f0b29ff23ae
git.kernel.org/stable/c/b47ba8fe6e... WEB
https://git.kernel.org/stable/c/b47ba8fe6e1d2df8c92048de5afafd059447dc30
git.kernel.org/stable/c/c2707480cf... WEB
https://git.kernel.org/stable/c/c2707480cfbf19c7619acc9c089d17f20869821f
git.kernel.org/stable/c/fdd4d7d523... WEB
https://git.kernel.org/stable/c/fdd4d7d52358a58e351dd9d82530c04eba8ccd7a

Frequently Asked Questions

What is CVE-2026-74667?
CVE-2026-74667 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-2026-74667?
Upgrading to current release patches (or the latest patched release for your respective branch) resolves the vulnerability.
What is the CVSS score of CVE-2026-74667?
CVE-2026-74667 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-2026-74667?
CVE-2026-74667 is classified under General Security Weakness.
How can I check Maven dependencies for CVE-2026-74667?
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-wqmr-77rq-877r",
  "modified" : "2026-08-25T06:31:26Z",
  "published" : "2026-08-22T18:30:28Z",
  "aliases" : [ "CVE-2026-74667" ],
  "details" : "In the Linux kernel, the following vulnerability has been resolved:\n\nnet/packet: reset the MAC header on the packet-socket transmit path\n\npacket_parse_headers() resets the MAC header only for a SOCK_RAW frame\nwhose socket did not bind a protocol. A protocol-bound SOCK_RAW socket,\nany SOCK_DGRAM frame, and the legacy SOCK_PACKET path therefore leave\nskb->mac_header unset here.\n\nFor frames sent via __dev_queue_xmit() this is harmless: it resets the\nMAC header unconditionally. But the packet-socket PACKET_QDISC_BYPASS\npath uses dev_direct_xmit(), which does not, so the frame reaches\nndo_start_xmit() with the MAC header unset. A driver that reads\neth_hdr(skb) on transmit then dereferences skb->head + (u16)~0, an\nout-of-bounds access ~64 KiB past the head -- the same class fixed for\none consumer in commit f5089008f90c (\"macsec: do not read an unset MAC\nheader in macsec_encrypt()\").\n\npacket_parse_headers() runs only on the transmit path, where skb->data\npoints at the start of the L2 header for every packet-socket type\nregardless of its length: SOCK_RAW and SOCK_PACKET carry a user-supplied\nheader and SOCK_DGRAM has one built by dev_hard_header(). Reset the MAC\nheader unconditionally, mirroring __dev_queue_xmit(), so the frame is\nanchored on the bypass path too.\n\nFound by 0sec (https://0sec.ai) using automated source analysis;\nverified against source and matched to the macsec KASAN report in\nf5089008f90c. Compile-tested.",
  "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-2026-74667"
  }, {
    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/1e43a1d66615f411d427f9df1f46dd049d9e3681"
  }, {
    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/2610ed4e86a4590234a9d70518c469751c5af231"
  }, {
    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/284f3e7a3f1a743fdf89e304fd1f19d5ffcff46d"
  }, {
    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/4057853a91fb796c4f47c7d1baf1aa085394148e"
  }, {
    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/971aa7d99242bbf09513e27b7a243f0b29ff23ae"
  }, {
    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/b47ba8fe6e1d2df8c92048de5afafd059447dc30"
  }, {
    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/c2707480cfbf19c7619acc9c089d17f20869821f"
  }, {
    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/fdd4d7d52358a58e351dd9d82530c04eba8ccd7a"
  } ],
  "database_specific" : {
    "cwe_ids" : [ ],
    "severity" : "HIGH",
    "github_reviewed" : false,
    "github_reviewed_at" : null,
    "nvd_published_at" : "2026-08-22T16:16:40Z"
  }
}