CVE-2026-80742: Software Security Vulnerability Vulnerability

UNKNOWN
Advisory Identifier: GHSA-66qw-vmh2-j2c2
Share
Published
Advisory Summary

CVE-2026-80742 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-2026-80742 at a Glance

CVE Identifier CVE-2026-80742
GHSA Identifier GHSA-66qw-vmh2-j2c2
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-2026-80742

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-2026-80742, 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: af_packet: Don't send zero-byte data in tpacket_snd(). syzbot reported a WARNING in __dev_queue_xmit() triggered via tpacket_snd(): skb_assert_len WARNING: at include/linux/skbuff.h:2753 skb_assert_len WARNING: at __dev_queue_xmit+0x21bc/0x4970 net/core/dev.c:4781 Call Trace: <TASK> dev_queue_xmit include/linux/netdevice.h:3448 [inline] packet_xmit+0x243/0x310 net/packet/af_packet.c:276 tpacket_snd net/packet/af_packet.c:2907 [inline] packet_sendmsg+0x28d6/0x4eb0 net/packet/af_packet.c:3134 When sending 0-byte packets via TPACKET ring buffer on devices with no hard header (e.g. dev->hard_header_len == 0), tpacket_fill_skb() populates an skb with skb->len == 0 and returns 0. tpacket_snd() then forwards this empty skb to packet_xmit(), causing __dev_queue_xmit() to hit skb_assert_len(skb). Similar checks exist in packet_snd() via commit dc633700f00f ("net/af_packet: check len when min_header_len equals to 0") and in packet_sendmsg_spkt() via commit 6a341729fb31 ("af_packet: Don't send zero-byte data in packet_sendmsg_spkt()."). Return -EINVAL in tpacket_fill_skb() when skb->len is zero to reject zero-length packets in tpacket_snd().

References

NVD — CVE-2026-80742 NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-80742
git.kernel.org/stable/c/1fc70b3d51... WEB
https://git.kernel.org/stable/c/1fc70b3d513bafb16b17540178870ef46e81c0bb
git.kernel.org/stable/c/3fa110f9e2... WEB
https://git.kernel.org/stable/c/3fa110f9e2ea96f567f2194c673c4bc327640111
git.kernel.org/stable/c/6bcd76c134... WEB
https://git.kernel.org/stable/c/6bcd76c134c55c697148acb5c0194e9666abdf84
git.kernel.org/stable/c/7521e691c7... WEB
https://git.kernel.org/stable/c/7521e691c7c4f2231634c95053281ac888d1f452
git.kernel.org/stable/c/80a7029644... WEB
https://git.kernel.org/stable/c/80a702964467b998d254f16cc61c2c9a20540c9d
git.kernel.org/stable/c/98c5914d6b... WEB
https://git.kernel.org/stable/c/98c5914d6b7bd4b4675535908e57dea31f1efd6a
git.kernel.org/stable/c/dde212f862... WEB
https://git.kernel.org/stable/c/dde212f8622f5cb36223fff1ebd6e6f2a3dc61fe
git.kernel.org/stable/c/f09ac5682f... WEB
https://git.kernel.org/stable/c/f09ac5682f1bb67981fcb6ead4d3cfe439225876

Frequently Asked Questions

What is CVE-2026-80742?
CVE-2026-80742 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-2026-80742?
Upgrading to current release patches (or the latest patched release for your respective branch) resolves the vulnerability.
What CWE is associated with CVE-2026-80742?
CVE-2026-80742 is classified under General Security Weakness.
How can I check Maven dependencies for CVE-2026-80742?
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-66qw-vmh2-j2c2",
  "modified" : "2026-09-03T15:32:15Z",
  "published" : "2026-09-03T15:32:15Z",
  "aliases" : [ "CVE-2026-80742" ],
  "details" : "In the Linux kernel, the following vulnerability has been resolved:\n\naf_packet: Don't send zero-byte data in tpacket_snd().\n\nsyzbot reported a WARNING in __dev_queue_xmit() triggered via tpacket_snd():\n\nskb_assert_len\nWARNING: at include/linux/skbuff.h:2753 skb_assert_len\nWARNING: at __dev_queue_xmit+0x21bc/0x4970 net/core/dev.c:4781\n\nCall Trace:\n <TASK>\n dev_queue_xmit include/linux/netdevice.h:3448 [inline]\n packet_xmit+0x243/0x310 net/packet/af_packet.c:276\n tpacket_snd net/packet/af_packet.c:2907 [inline]\n packet_sendmsg+0x28d6/0x4eb0 net/packet/af_packet.c:3134\n\nWhen sending 0-byte packets via TPACKET ring buffer on devices with no\nhard header (e.g. dev->hard_header_len == 0), tpacket_fill_skb()\npopulates an skb with skb->len == 0 and returns 0. tpacket_snd() then\nforwards this empty skb to packet_xmit(), causing __dev_queue_xmit() to\nhit skb_assert_len(skb).\n\nSimilar checks exist in packet_snd() via commit dc633700f00f\n(\"net/af_packet: check len when min_header_len equals to 0\") and in\npacket_sendmsg_spkt() via commit 6a341729fb31 (\"af_packet: Don't send\nzero-byte data in packet_sendmsg_spkt().\").\n\nReturn -EINVAL in tpacket_fill_skb() when skb->len is zero to reject\nzero-length packets in tpacket_snd().",
  "severity" : [ ],
  "affected" : [ ],
  "references" : [ {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2026-80742"
  }, {
    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/1fc70b3d513bafb16b17540178870ef46e81c0bb"
  }, {
    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/3fa110f9e2ea96f567f2194c673c4bc327640111"
  }, {
    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/6bcd76c134c55c697148acb5c0194e9666abdf84"
  }, {
    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/7521e691c7c4f2231634c95053281ac888d1f452"
  }, {
    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/80a702964467b998d254f16cc61c2c9a20540c9d"
  }, {
    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/98c5914d6b7bd4b4675535908e57dea31f1efd6a"
  }, {
    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/dde212f8622f5cb36223fff1ebd6e6f2a3dc61fe"
  }, {
    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/f09ac5682f1bb67981fcb6ead4d3cfe439225876"
  } ],
  "database_specific" : {
    "cwe_ids" : [ ],
    "severity" : null,
    "github_reviewed" : false,
    "github_reviewed_at" : null,
    "nvd_published_at" : "2026-09-03T13:06:13Z"
  }
}