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Fencer Vulns
medium 6.5

CVE-2026-115455 json

Gcc: stack overflow in std::bitset on libstdc++

published 2026-10-30 10 d ago modified 2026-11-05 4 d ago also EUVD-2026-113747

cvss
6.5
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.3%
EPSS 0.3% chance of exploitation in 30 days, percentile 24%
public exploits
0
none known

Summary

A flaw was found in GCC libstdc++. When an application extracts data into a bitset from a wide-character stream, internal stack memory allocation fails to properly account for character size and alignment. An attacker capable of supplying crafted input to an affected application could trigger a stack-based buffer overflow leading denial of service (DoS).

Patch / fix

  • Red Hat Red Hat Hardened Images 13.5.0-0.4.hum1
  • gcc16 openSUSE Tumbleweed 16.2.1+git9901-1.1

opensuse advisories openSUSE-SU-2026:12482-1

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-2026-115455 updated cvss 6.5

gcc: Stack overflow in std::bitset on libstdc++

  • Red Hat Enterprise Linux 8 gcc-toolset-15-gcc, gcc-toolset-15-gcc-c++, gcc-toolset-15-libgccjit, gcc-toolset-15-gcc-gfortran, gcc-toolset-15-offload-nvptx, gcc-toolset-15-gcc-plugin-annobin Red Hat Enterprise Linux 9 gcc-toolset-15-gcc, gcc-toolset-16-gcc, gcc-toolset-15-gcc-c++, gcc-toolset-15-libgccjit, gcc-toolset-15-gcc-gfortran, gcc-toolset-15-offload-nvptx, +1 more
    affected: workaround, no fix available
  • Red Hat Enterprise Linux 10 gcc, mingw-gcc, mingw32-gcc, mingw64-gcc, gcc-toolset-15-gcc, gcc-toolset-16-gcc
    affected: workaround, no fix available “Fix deferred”
  • Red Hat Hardened Images gcc
    affected: workaround, no fix available
  • Red Hat Hardened Images gcc13 13.5.0-0.4.hum1, gcc13-c++ 13.5.0-0.4.hum1, gcc13-gfortran 13.5.0-0.4.hum1, gcc13-plugin-annobin 13.5.0-0.4.hum1
    fixed: vendor fix RHSA-2026:94989
  • 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 8 cpp, gcc, libgcc, libitm, gcc-c++, libasan, +27 more Red Hat Enterprise Linux 9 cpp, gcc, libgcc, libitm, gcc-c++, libasan, +32 more Red Hat OpenShift Container Platform 4 openshift/ose-rhel-coreos-8, openshift/ose-rhel-coreos-9 Red Hat OpenShift Container Platform 5 openshift/ose-rhel-coreos-9
    not affected: vulnerable code 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
5 d ago

Exploit prediction

0.31% chance of exploitation in the next 30 days, higher than 24% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
CNA 3.1 6.5 CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:H

Affected products

  • 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 8
  • Red Hat Red Hat Enterprise Linux 9
  • Red Hat Red Hat OpenShift Container Platform 4
  • Red Hat Red Hat OpenShift Container Platform 5

Classification

Weakness

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.