CVE-2026-71969: Software Security Vulnerability Vulnerability

HIGH
Advisory Identifier: GHSA-hg7c-pmh6-576f
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CVSS 6.7
CWE-124
Published
Advisory Summary

CVE-2026-71969 is a HIGH (CVSS 6.7) security vulnerability vulnerability (CWE-124: Buffer Underwrite ('Buffer Underflow')) affecting Software libraries in the Maven ecosystem. The weakness occurs when the product writes to a buffer using an index or pointer that references a memory location prior to the beginning of the buffer.. Remediation is available in the latest vendor maintenance releases.

CVE-2026-71969 at a Glance

CVE Identifier CVE-2026-71969
GHSA Identifier GHSA-hg7c-pmh6-576f
Severity HIGH
CVSS v3.1 Base Score 6.7
CWE Classification CWE-124: Buffer Underwrite ('Buffer Underflow')
Affected Product Software
Package Ecosystem Maven
Published Date
Last Updated

Security Impact

CVSS: 6.7

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

Attack Vector Local (AV:L)
Attack Complexity Low (AC:L)
Privileges Required High (PR:H)
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-2026-71969

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-2026-71969, 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 CWE-124: Buffer Underwrite ('Buffer Underflow'), where the product writes to a buffer using an index or pointer that references a memory location prior to the beginning of the buffer. 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

OP-TEE OS through 4.10.0, fixed in commit 7b8b494, contains a buffer underwrite vulnerability in the RSA NOPAD encrypt and decrypt operations within the mbedTLS software backend and SE050 hardware driver that allows a malicious Trusted Application to corrupt secure-world heap memory by supplying an input length exceeding the RSA modulus size. When src_len exceeds rsa_len, the subtraction expression wraps to a large unsigned value, causing a subsequent memcpy to write attacker-controlled data before the destination buffer in S-EL1 secure-world heap memory.

References

NVD — CVE-2026-71969 NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-71969
Software Source Repository REPOSITORY
https://github.com/OP-TEE/optee_os/pull/7808
Software Source Repository REPOSITORY
https://github.com/OP-TEE/optee_os/pull/7898
Security Fix Commit FIX COMMIT
https://github.com/OP-TEE/optee_os/commit/7b8b494e0a324cefec8ed386b7de413b44f1aaf3
blog.secmate.dev/posts/optee-vulnera... WEB
https://blog.secmate.dev/posts/optee-vulnerabilities-disclosure
www.vulncheck.com/advisories/op-tee-o... WEB
https://www.vulncheck.com/advisories/op-tee-os-buffer-underwrite-via-rsa-nopad-encrypt-decrypt-operations

Frequently Asked Questions

What is CVE-2026-71969?
CVE-2026-71969 is a security vulnerability in Software classified as a security vulnerability vulnerability under CWE-124: Buffer Underwrite ('Buffer Underflow').
Which Software versions are affected?
Affected versions include releases prior to current release patches.
What version fixes CVE-2026-71969?
Upgrading to current release patches (or the latest patched release for your respective branch) resolves the vulnerability.
What is the CVSS score of CVE-2026-71969?
CVE-2026-71969 has a CVSS v3.1 base score of 6.7 (HIGH) with vector string CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H.
What CWE is associated with CVE-2026-71969?
CVE-2026-71969 is classified under CWE-124: Buffer Underwrite ('Buffer Underflow') (The product writes to a buffer using an index or pointer that references a memory location prior to the beginning of the buffer.).
How can I check Maven dependencies for CVE-2026-71969?
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-hg7c-pmh6-576f",
  "modified" : "2026-08-17T21:31:13Z",
  "published" : "2026-08-10T21:32:03Z",
  "aliases" : [ "CVE-2026-71969" ],
  "details" : "OP-TEE OS through 4.10.0, fixed in commit 7b8b494, contains a buffer underwrite vulnerability in the RSA NOPAD encrypt and decrypt operations within the mbedTLS software backend and SE050 hardware driver that allows a malicious Trusted Application to corrupt secure-world heap memory by supplying an input length exceeding the RSA modulus size. When src_len exceeds rsa_len, the subtraction expression wraps to a large unsigned value, causing a subsequent memcpy to write attacker-controlled data before the destination buffer in S-EL1 secure-world heap memory.",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H"
  }, {
    "type" : "CVSS_V4",
    "score" : "CVSS:4.0/AV:L/AC:L/AT:N/PR:H/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X"
  } ],
  "affected" : [ ],
  "references" : [ {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2026-71969"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/OP-TEE/optee_os/pull/7808"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/OP-TEE/optee_os/pull/7898"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/OP-TEE/optee_os/commit/7b8b494e0a324cefec8ed386b7de413b44f1aaf3"
  }, {
    "type" : "WEB",
    "url" : "https://blog.secmate.dev/posts/optee-vulnerabilities-disclosure"
  }, {
    "type" : "WEB",
    "url" : "https://www.vulncheck.com/advisories/op-tee-os-buffer-underwrite-via-rsa-nopad-encrypt-decrypt-operations"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-124" ],
    "severity" : "HIGH",
    "github_reviewed" : false,
    "github_reviewed_at" : null,
    "nvd_published_at" : "2026-08-10T19:17:32Z"
  }
}