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Fencer Vulns
high 7.7

CVE-2026-95619 json

Gcc: libstdc++ integer overflow in `new` operator

published 2026-09-22 48 d ago modified 2026-11-06 3 d ago also EUVD-2026-84373

cvss
7.7
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.4%
EPSS 0.4% chance of exploitation in 30 days, percentile 38%
public exploits
0
none known

Summary

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

Patch / fix

  • Red Hat Red Hat Enterprise Linux 8 0:8.5.0-30.el8_10
  • Red Hat Red Hat Hardened Images 13.5.0-0.1.hum1, 16.2.1-2.hum1
  • gcc-13 Debian 14 13.5.0-3
  • gcc-14 Debian 14 14.4.0-3
  • gcc-15 Debian 14 15.3.0-5
  • gcc-16 Debian 14 16.2.0-4

debian advisories DEBIAN-CVE-2026-95619

  • gcc-12 Ubuntu 24.04 LTS 12.4.0-2ubuntu1~24.04
  • gcc-12-cross Ubuntu 24.04 LTS 19ubuntu2.2

ubuntu advisories UBUNTU-CVE-2026-95619

Ubuntu security data © Canonical Ltd., from https://github.com/canonical/ubuntu-security-notices via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

  • gcc13 hummingbird 1 13.5.0-0.1.hum1
  • gcc13-c++ hummingbird 1 13.5.0-0.1.hum1
  • gcc13-gfortran hummingbird 1 13.5.0-0.1.hum1
  • gcc13-plugin-annobin hummingbird 1 13.5.0-0.1.hum1
  • cpp hummingbird 1 16.2.1-2.hum1
  • gcc hummingbird 1 16.2.1-2.hum1
  • libgcc hummingbird 1 16.2.1-2.hum1
  • libitm hummingbird 1 16.2.1-2.hum1

red hat advisories RHSA-2026:67275RHSA-2026:58503

  • gcc7 SLES for SAP 15 SP6, SLES for SAP 15 SP5, SLES for SAP 15 SP4 +9 more 7.5.0+r278197-150000.4.49.1
  • cross-nvptx-gcc7 SLES for SAP 15 SP6, SLES for SAP 15 SP5, SLES for SAP 15 SP4 +8 more 7.5.0+r278197-150000.4.49.1

suse advisories SUSE-SU-2026:4913-1

  • gcc7 openSUSE Tumbleweed 7.5.0+r278197-25.1

opensuse advisories openSUSE-SU-2026:11942-1

  • gcc AlmaLinux 8 8.5.0-30.el8_10.alma.1
  • cpp AlmaLinux 8 8.5.0-30.el8_10.alma.1
  • libgcc AlmaLinux 8 8.5.0-30.el8_10.alma.1
  • libitm AlmaLinux 8 8.5.0-30.el8_10.alma.1
  • gcc-c++ AlmaLinux 8 8.5.0-30.el8_10.alma.1
  • libasan AlmaLinux 8 8.5.0-30.el8_10.alma.1
  • libgomp AlmaLinux 8 8.5.0-30.el8_10.alma.1
  • liblsan AlmaLinux 8 8.5.0-30.el8_10.alma.1

almalinux advisories ALSA-2026:89830

  • gcc Rocky Linux 8 8.5.0-30.el8_10

rocky linux advisories RLSA-2026:89830

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2026-95619 updated cvss 7.7

gcc: libstdc++ integer overflow in `new` operator

  • Red Hat Enterprise Linux 8 stress-ng, mingw32-cpp, mingw32-gcc, mingw64-cpp, mingw64-gcc, rteval-loads, +2 more Red Hat Enterprise Linux 9 cpp, gcc, libgcc, libitm, gcc-c++, libasan, +24 more Red Hat OpenShift Container Platform 4 openshift/ose-rhel-coreos-9 Red Hat OpenShift Container Platform 5 openshift/ose-rhel-coreos-9
    affected: workaround, no fix available
  • Red Hat OpenShift AI (RHOAI) rhoai/odh-core-bff-rhel9, rhoai/odh-dashboard-rhel9, rhoai/odh-mod-arch-maas-rhel9, rhoai/odh-mod-arch-automl-rhel9, rhoai/odh-mod-arch-gen-ai-rhel9, rhoai/odh-mod-arch-mlflow-rhel9, +6 more
    under investigation
  • Red Hat Enterprise Linux AppStream (v. 8) cpp 8.5.0-30.el8_10, gcc 8.5.0-30.el8_10, gcc-c++ 8.5.0-30.el8_10, gcc-gfortran 8.5.0-30.el8_10, gcc-gdb-plugin 8.5.0-30.el8_10, gcc-offload-nvptx 8.5.0-30.el8_10, +1 more Red Hat Enterprise Linux BaseOS (v. 8) gcc 8.5.0-30.el8_10, libgcc 8.5.0-30.el8_10, libitm 8.5.0-30.el8_10, libasan 8.5.0-30.el8_10, libgomp 8.5.0-30.el8_10, liblsan 8.5.0-30.el8_10, +7 more Red Hat Enterprise Linux CRB (v. 8) cpp-debuginfo 8.5.0-30.el8_10, gcc-debuginfo 8.5.0-30.el8_10, gcc-debugsource 8.5.0-30.el8_10, gcc-plugin-devel 8.5.0-30.el8_10, libgcc-debuginfo 8.5.0-30.el8_10, libitm-debuginfo 8.5.0-30.el8_10, +19 more
    fixed: vendor fix RHSA-2026:89830
  • Red Hat Hardened Images cpp 16.2.1-2.hum1, gcc 16.2.1-2.hum1, libgcc 16.2.1-2.hum1, libitm 16.2.1-2.hum1, gcc-c++ 16.2.1-2.hum1, gcc13 13.5.0-0.1.hum1, +22 more
    fixed: vendor fix RHSA-2026:58503
  • Red Hat Enterprise Linux 6 cpp, gcc, libgcc, libgcj, libitm, gcc-c++, +23 more Red Hat Enterprise Linux 7 cpp, gcc, libgo, gcc-go, libgcc, libitm, +20 more Red Hat Enterprise Linux 10 gcc, mingw-gcc, mingw32-gcc, mingw64-gcc Red Hat OpenShift AI (RHOAI) rhoai/odh-mlflow-rhel9, rhoai/odh-kube-rbac-proxy-rhel9, rhoai/odh-maas-controller-rhel9, rhoai/odh-mlflow-operator-rhel9, rhoai/odh-model-controller-rhel9, rhoai/odh-ogx-k8s-operator-rhel9, +14 more
    not affected: vulnerable code not present
  • Red Hat OpenShift Container Platform 4 openshift/ose-rhel-coreos-8
    not affected: component not present

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

CISA SSVC

Exploitation
none
Automatable
no
Technical impact
partial
Assessed
47 d ago

Exploit prediction

0.44% chance of exploitation in the next 30 days, higher than 38% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
CNA 3.1 7.7 CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:H/A:H

Affected products

  • Red Hat Red Hat Enterprise Linux 8
  • Red Hat Red Hat Hardened Images
  • Red Hat Red Hat Enterprise Linux 10
  • Red Hat Red Hat Enterprise Linux 6
  • Red Hat Red Hat Enterprise Linux 7
  • Red Hat Red Hat Enterprise Linux 9
  • Red Hat Red Hat OpenShift AI (RHOAI)
  • Red Hat Red Hat OpenShift Container Platform 4
  • Red Hat Red Hat OpenShift Container Platform 5

Classification

Weakness
  • CWE-190 Integer Overflow or Wraparound

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.