Medium · CVSS 6.2CVE-2026-114690

Gcc: confirmed out-of-bounds read/write in libstdc++ parallel `stdCVE-2026-114690

Answer in brief

CVE-2026-114690 records a Medium severity (CVSS 6.2) vulnerability in Gcc: confirmed out-of-bounds read/write in libstdc++ parallel `std. The current sources do not mark it as known exploited. The current feed maps Red Hat/gcc (generic), Red Hat/gcc13 (generic), Red Hat/gcc-toolset-14-gcc (generic), Red Hat/gcc-toolset-15-gcc (generic) and additional mapped packages. Check affected ranges and fixed versions before updating.

Analysis pending evidence review

HOL Guard separates source facts from reviewed analysis. See the methodology.

Published Oct 30, 2026Updated Oct 30, 2026Source checked Oct 30, 2026First seen by HOL Oct 30, 2026Material review Oct 30, 2026

Upstream Advisory

Key facts

Risk: Medium · CVSS 6.2
Exploitation: Not marked as known exploited
Affected software: 6 mapped packages or products
Fix availability: Not reported

Why this deserves its current priority

CVSS is 6.2. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.

Analysis status

Analysis pending evidence review

Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.

Affected scope and exposure questions

The current feed maps Red Hat/gcc (generic), Red Hat/gcc13 (generic), Red Hat/gcc-toolset-14-gcc (generic), Red Hat/gcc-toolset-15-gcc (generic) and additional mapped packages. Check affected ranges and fixed versions before updating.

Mapped affected packages and fixed versions
Package	Affected range	Fixed version
Red Hat/gccgeneric	*	Not reported
Red Hat/gcc13generic	*	Not reported
Red Hat/gcc-toolset-14-gccgeneric	*	Not reported
Red Hat/gcc-toolset-15-gccgeneric	*	Not reported
Red Hat/gcc-toolset-16-gccgeneric	*	Not reported
Red Hat/mingw-gccgeneric	*	Not reported

Recommended response

Check inventory. Check lockfiles and deployed manifests for Red Hat/gcc, Red Hat/gcc13, Red Hat/gcc-toolset-14-gcc.
Review the reported fix. Source-reported workaround: Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base, or stability.

Evidence timeline and material changes

Published upstream
Oct 30, 2026
Evidence: source:cvelist:source_dates:source-dates:record
Source modified
Oct 30, 2026
Evidence: source:cvelist:source_dates:source-dates:record
First seen by HOL
Oct 30, 2026

Sources and claim methodology

Upstream source description

A flaw was found in GCC. An out-of-bounds memory access vulnerability exists in the libstdc++ parallel search implementation due to an undersized internal buffer. A local attacker can exploit this flaw by providing crafted search data to an application compiled with parallel mode, causing the process to crash and leading to a Denial of Service (DoS).

Quoted source text, attributed separately from HOL analysis.