---
id: "CVE-2026-114691"
kind: "vulnerability"
aliases: ["CVE-2026-114691"]
title: "GCC libstdc++: oversized std::vector<bool> size crashes applications via memory corruption"
severity: "medium"
cvss: 5.9
epss: null
exploited: false
status: "open"
category: "package"
products: []
ecosystems: []
tags: ["c++", "gcc", "libstdc++", "package"]
not_affected_if: ["no-untrusted-input"]
published_at: "2026-10-30T08:16:55+00:00"
first_seen_at: "2026-10-30T08:29:26+00:00"
updated_at: "2026-10-30T08:30:15+00:00"
sources: [{"source": "nvd", "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-114691", "first_seen_at": "2026-10-30T08:29:26+00:00"}]
---

# GCC libstdc++: oversized std::vector<bool> size crashes applications via memory corruption

An oversized element count passed to the boolean vector constructor in GCC's libstdc++ causes an integer wrap in memory sizing. The container is left inconsistent, so later operations read or write out of bounds and crash the application (denial of service).

_Summary, check and fix written by a model from the sources; labelled as such._

## Timeline

- 2026-10-30T08:29:26+00:00 nvd https://nvd.nist.gov/vuln/detail/CVE-2026-114691

## From the sources

A flaw was found in the libstdc++ component of GCC. An attacker who can provide an excessively large element count to a boolean vector (std::vector<bool>) constructor can trigger an integer wrap during internal memory calculations. This issue leaves the container in an inconsistent state, leading to out-of-bounds memory access and resulting in an application crash or a Denial of Service (DoS) during subsequent operations.

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