CVE-2026-95619 Red Hat CVE debrief

Who should care

Defenders responsible for systems using libstdc++ should assess exposure and prioritize remediation to prevent potential memory corruption or application instability. This includes operators, platform administrators, vulnerability management teams, and security teams. They should review vendor guidance for remediation steps and verify affected systems.

Why it matters

CVE-2026-95619 is a high-severity vulnerability in libstdc++ that can lead to memory corruption or application instability due to an integer overflow in the aligned operator new. Defenders should assess exposure, prioritize remediation, and verify affected systems.

• Verify affected systems and assess exposure to prioritize remediation
• Prevent potential memory corruption or application instability
• Ensure proper memory allocation to prevent undersized allocations

Technical summary

The CVE-2026-95619 vulnerability is caused by an integer overflow in the aligned operator new in libstdc++. This can lead to an undersized memory allocation, potentially causing memory corruption or application instability. The vulnerability has a CVSS score of 7.7 and is classified as HIGH severity. Defenders should prioritize verifying affected systems, assessing exposure, and applying remediation to prevent potential memory corruption or application instability. The aligned operator new in libstdc++ is vulnerable to integer overflow.

Defensive priority

Defenders should prioritize verifying affected systems, assessing exposure, and applying remediation to prevent potential memory corruption or application instability.

Recommended defensive actions

• Verify if systems using libstdc++ are exposed to this vulnerability
• Assess the risk of memory corruption or application instability
• Prioritize remediation based on system criticality and exposure
• Apply patches or updates from the vendor once available
• Review compensating controls for exposed systems while remediation is scheduled and verified
• Check relevant monitoring, detection, and logs for exposed assets that need extra review
• Track exceptions, retest remediated assets, and close the item only after evidence is documented

Evidence notes

The CVE record and NVD entry provide details on the vulnerability, but additional information on affected versions, exploitation, and remediation is limited. Defenders should verify affected systems, assess exposure, and prioritize remediation based on system criticality and exposure. The aligned operator new in libstdc++ is vulnerable to integer overflow, which can lead to undersized memory allocation and potential memory corruption or application instability.

Sources and references

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.