CVE-2026-95619
Received Received - Intake

Integer Overflow in libstdc++ Memory Allocation

Publication date: 2026-09-22

Last updated on: 2026-09-22

Assigner: redhat-SADP

Description
A flaw was found in libstdc++. An integer overflow can occur when processing large inputs to the C++ `new` operator. This vulnerability could lead to an undersized memory allocation, potentially causing memory corruption or application instability.

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Meta Information

Published
2026-09-22
Last Modified
2026-09-22
Generated
2026-09-22
AI Q&A
2026-09-22
EPSS Evaluated
N/A
NVD
CVE-2026-95619
EUVD
EUVD-2026-84373

Affected Vendors & Products

Showing 1 associated CPE
Vendor Product Version / Range
gnu libstdc%2b%2b to 12.4 (exc)

Helpful Resources

Exploitability

CWE
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KEV
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CWE ID Description
CWE-190 The product performs a calculation that can produce an integer overflow or wraparound when the logic assumes that the resulting value will always be larger than the original value. This occurs when an integer value is incremented to a value that is too large to store in the associated representation. When this occurs, the value may become a very small or negative number.

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Executive Summary

This vulnerability is an integer overflow flaw in libstdc++ where processing large inputs to the C++ new operator causes an undersized memory allocation. This can lead to memory corruption or application instability. It affects applications compiled with older GCC versions.

Detection Guidance

Detecting this vulnerability requires checking for applications compiled with older GCC versions (pre-12.4) using libstdc++. Inspect GCC versions with 'gcc --version' and check libstdc++ usage in applications. Monitor for crashes or memory corruption in applications handling large inputs.

Impact Analysis

The vulnerability may cause crashes, resource exhaustion, or memory corruption in affected applications. It could lead to instability or unexpected behavior in software using older GCC versions on RHEL 8 and 9.

Compliance Impact

This vulnerability could lead to memory corruption or application instability, which may result in unauthorized data access or processing errors. Such issues could violate GDPR's integrity and confidentiality requirements or HIPAA's safeguards for protected health information if exploited.

Mitigation Strategies

Upgrade GCC to version 12.4 or later where possible. For RHEL systems, monitor Red Hat advisories for updates. If upgrading is not feasible, restrict access to vulnerable applications or implement runtime monitoring for memory issues.

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