CVE-2026-68278: Software Security Vulnerability Vulnerability

UNKNOWN
Advisory Identifier: GHSA-4w62-3fjj-vmpc
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Advisory Summary

CVE-2026-68278 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-2026-68278 at a Glance

CVE Identifier CVE-2026-68278
GHSA Identifier GHSA-4w62-3fjj-vmpc
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-2026-68278

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-2026-68278, 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: drm/dp/mst: fix buffer overflows in sideband chunk accumulation drm_dp_sideband_append_payload() has three related bugs when processing device-provided sideband reply data: 1. Zero-length curchunk_len underflow: msg_len is a 6-bit field taken directly from the DP sideband header. If a device sends msg_len=0, curchunk_len is set to zero. The condition (curchunk_idx >= curchunk_len) is immediately true, and curchunk_len-1 wraps to 255 (u8 underflow). drm_dp_msg_data_crc4() reads 255 bytes from chunk[48], then memcpy() writes 255 bytes into msg[], both far out of bounds. 2. chunk[48] overflow: curchunk_len can reach 63 (6-bit field). chunk[] is only 48 bytes. Multi-iteration payload assembly appends 16-byte blocks until curchunk_idx reaches curchunk_len, writing up to 15 bytes past the end of chunk[] into msg[]. 3. msg[256] overflow: each chunk contributes (curchunk_len-1) bytes to msg[]. No check ensures curlen + (curchunk_len-1) stays within msg[256], so the memcpy can spill into adjacent struct fields. All three are reachable from any DP MST device that can forge sideband reply messages on a physical connection.

References

NVD — CVE-2026-68278 NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-68278
git.kernel.org/stable/c/1e5827839a... WEB
https://git.kernel.org/stable/c/1e5827839ad0ceb0079d1560c321fa3656b54f21
git.kernel.org/stable/c/4d5109075a... WEB
https://git.kernel.org/stable/c/4d5109075a787de28c9e89940f9dee45269f91fa
git.kernel.org/stable/c/53937a2787... WEB
https://git.kernel.org/stable/c/53937a2787d29c7a460e984dc4f20ff6ac91dc65
git.kernel.org/stable/c/55bd5e685b... WEB
https://git.kernel.org/stable/c/55bd5e685bda455b9b50c835f8c8442d52a344a3
git.kernel.org/stable/c/a6366b5510... WEB
https://git.kernel.org/stable/c/a6366b551079c79bf7bdbadd74c97358bcfe2d58
git.kernel.org/stable/c/d4e05dedb2... WEB
https://git.kernel.org/stable/c/d4e05dedb252ed3e540a0c9be511e427f098110a
git.kernel.org/stable/c/ef0dbcc200... WEB
https://git.kernel.org/stable/c/ef0dbcc200c3389f1f781ab181932a97e54b51af
git.kernel.org/stable/c/ef2ecb6cf2... WEB
https://git.kernel.org/stable/c/ef2ecb6cf268debf3890df99fea01b6452dcf78e

Frequently Asked Questions

What is CVE-2026-68278?
CVE-2026-68278 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-2026-68278?
Upgrading to current release patches (or the latest patched release for your respective branch) resolves the vulnerability.
What CWE is associated with CVE-2026-68278?
CVE-2026-68278 is classified under General Security Weakness.
How can I check Maven dependencies for CVE-2026-68278?
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 
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  "schema_version" : "1.4.0",
  "id" : "GHSA-4w62-3fjj-vmpc",
  "modified" : "2026-08-23T15:32:57Z",
  "published" : "2026-08-10T15:33:44Z",
  "aliases" : [ "CVE-2026-68278" ],
  "details" : "In the Linux kernel, the following vulnerability has been resolved:\n\ndrm/dp/mst: fix buffer overflows in sideband chunk accumulation\n\ndrm_dp_sideband_append_payload() has three related bugs when processing\ndevice-provided sideband reply data:\n\n1. Zero-length curchunk_len underflow: msg_len is a 6-bit field taken\n   directly from the DP sideband header. If a device sends msg_len=0,\n   curchunk_len is set to zero. The condition (curchunk_idx >= curchunk_len)\n   is immediately true, and curchunk_len-1 wraps to 255 (u8 underflow).\n   drm_dp_msg_data_crc4() reads 255 bytes from chunk[48], then memcpy()\n   writes 255 bytes into msg[], both far out of bounds.\n\n2. chunk[48] overflow: curchunk_len can reach 63 (6-bit field). chunk[] is\n   only 48 bytes. Multi-iteration payload assembly appends 16-byte blocks\n   until curchunk_idx reaches curchunk_len, writing up to 15 bytes past\n   the end of chunk[] into msg[].\n\n3. msg[256] overflow: each chunk contributes (curchunk_len-1) bytes to\n   msg[]. No check ensures curlen + (curchunk_len-1) stays within msg[256],\n   so the memcpy can spill into adjacent struct fields.\n\nAll three are reachable from any DP MST device that can forge sideband\nreply messages on a physical connection.",
  "severity" : [ ],
  "affected" : [ ],
  "references" : [ {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2026-68278"
  }, {
    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/1e5827839ad0ceb0079d1560c321fa3656b54f21"
  }, {
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    "url" : "https://git.kernel.org/stable/c/4d5109075a787de28c9e89940f9dee45269f91fa"
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    "url" : "https://git.kernel.org/stable/c/ef0dbcc200c3389f1f781ab181932a97e54b51af"
  }, {
    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/ef2ecb6cf268debf3890df99fea01b6452dcf78e"
  } ],
  "database_specific" : {
    "cwe_ids" : [ ],
    "severity" : null,
    "github_reviewed" : false,
    "github_reviewed_at" : null,
    "nvd_published_at" : "2026-08-10T13:20:16Z"
  }
}