# CVE-2026-115456: Gcc: out-of-bounds read in std::from_chars

Status: published. Published: 2026-10-30. Updated: 2026-11-03.

A flaw was found in gcc. An attacker could cause a Denial of Service (DoS) by passing a string that is not null-terminated to the std::from_chars() function in the libstdc++ library. This issue triggers an out-of-bounds read beyond the allocated buffer, potentially leading to invalid data parsing or an application crash.

## Remediation

- 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. (source: CNA: redhat)

## Affected products and versions

- Red Hat / Red Hat Enterprise Linux 10 (gcc): Version range not reported. Source: CNA: redhat
- Red Hat / Red Hat Enterprise Linux 10 (gcc-toolset-15-gcc): Version range not reported. Source: CNA: redhat
- Red Hat / Red Hat Enterprise Linux 10 (gcc-toolset-16-gcc): Version range not reported. Source: CNA: redhat
- Red Hat / Red Hat Enterprise Linux 10 (mingw-gcc): Version range not reported. Source: CNA: redhat
- Red Hat / Red Hat Enterprise Linux 6 (compat-gcc-295): Version range not reported. Source: CNA: redhat
- Red Hat / Red Hat Enterprise Linux 6 (compat-gcc-296): Version range not reported. Source: CNA: redhat
- Red Hat / Red Hat Enterprise Linux 6 (compat-gcc-32): Version range not reported. Source: CNA: redhat
- Red Hat / Red Hat Enterprise Linux 6 (compat-gcc-34): Version range not reported. Source: CNA: redhat
- Red Hat / Red Hat Enterprise Linux 6 (gcc): Version range not reported. Source: CNA: redhat
- Red Hat / Red Hat Enterprise Linux 7 (compat-gcc-32): Version range not reported. Source: CNA: redhat
- Red Hat / Red Hat Enterprise Linux 7 (compat-gcc-34): Version range not reported. Source: CNA: redhat
- Red Hat / Red Hat Enterprise Linux 7 (compat-gcc-44): Version range not reported. Source: CNA: redhat
- Red Hat / Red Hat Enterprise Linux 7 (gcc): Version range not reported. Source: CNA: redhat
- Red Hat / Red Hat Enterprise Linux 8 (gcc): Version range not reported. Source: CNA: redhat
- Red Hat / Red Hat Enterprise Linux 8 (gcc-toolset-14-gcc): Version range not reported. Source: CNA: redhat
- Red Hat / Red Hat Enterprise Linux 8 (gcc-toolset-15-gcc): Version range not reported. Source: CNA: redhat
- Red Hat / Red Hat Enterprise Linux 8 (mingw-gcc): Version range not reported. Source: CNA: redhat
- Red Hat / Red Hat Enterprise Linux 9 (gcc): Version range not reported. Source: CNA: redhat
- Red Hat / Red Hat Enterprise Linux 9 (gcc-toolset-14-gcc): Version range not reported. Source: CNA: redhat
- Red Hat / Red Hat Enterprise Linux 9 (gcc-toolset-15-gcc): Version range not reported. Source: CNA: redhat
- Red Hat / Red Hat Enterprise Linux 9 (gcc-toolset-16-gcc): Version range not reported. Source: CNA: redhat
- Red Hat / Red Hat Enterprise Linux 9 (mingw-gcc): Version range not reported. Source: CNA: redhat
- Red Hat / Red Hat Hardened Images (gcc): Version range not reported. Source: CNA: redhat
- Red Hat / Red Hat Hardened Images (gcc13): Version range not reported. Source: CNA: redhat
- Red Hat / Red Hat OpenShift Container Platform 4 (openshift/ose-rhel-coreos-8): Version range not reported. Source: CNA: redhat
- Red Hat / Red Hat OpenShift Container Platform 4 (openshift/ose-rhel-coreos-9): Version range not reported. Source: CNA: redhat
- Red Hat / Red Hat OpenShift Container Platform 5 (openshift/ose-rhel-coreos-9): Version range not reported. Source: CNA: redhat

## Severity and prioritization

- CVSS 3.1: 3.7 (low); CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L; source: CNA: redhat

- CISA KEV: No listing in collected sources

- EPSS: 0.22% as of 2026-11-03; percentile 12.79%

- SSVC: exploitation none; automatable no; technical impact partial; source ADP: CISA-ADP

- Weaknesses: CWE-125

## Exploit evidence

No exploit evidence in collected sources. This is not proof of no exploitation.

## References

- https://access.redhat.com/security/cve/CVE-2026-115456 (CNA: redhat; vdb-entry, x_refsource_REDHAT)

- https://bugzilla.redhat.com/show_bug.cgi?id=2563044 (CNA: redhat; issue-tracking, x_refsource_REDHAT)

## Provenance

- CNA: redhat: https://www.cve.org/CVERecord?id=CVE-2026-115456; retrieved 2026-11-03; source updated 2026-11-03

- FIRST EPSS: https://api.first.org/data/v1/epss?cve=CVE-2026-115456; retrieved 2026-11-03; source updated Not reported

Revision: 373d1deddfd4bc06e98e56eb36dc62ee956cb7326a89587259a2e7973fd1d8d8

Canonical: https://y2.dev/cve/CVE-2026-115456

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