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No exploitation reportedFix availableAwaiting NVD analysis

CVE-2026-115455

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

No exploitation reported by the sources we read.

  • Published2026-10-30
  • WeaknessCWE-787

Am I affected?

With a domain, we read the version its public headers and pages expose. A distribution build can carry the fix under an older number.

Description

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).

Timeline

dates in UTC
  1. 2026-10-3007:13CVE publishedCNA

Versions per branch

Products declared by the CNA27 products

As redhat, the CNA that assigned this CVE, declared them in the CVE record; versions as written.

21 more products in the CVE record.

Source: the CNA record (CVE Program), © The MITRE Corporation,CVE Terms of UseCVE recordupdated 2026-11-05

Distribution builds and vendor advisories

Packages from OSV.dev and products from the vendors' CSAF advisories.

version not verifiedVersions not verified: read as OSV.dev and the vendors publish them, not checked against each vendor's release list.

Packages

  • gccAzure Linux:3all versions · no fixed version listed
  • gcc-11Ubuntu:26.10all versions · no fixed version listedand 16 other packages
  • gcc-11Ubuntu:26.04:LTSall versions · no fixed version listedand 16 other packages
  • gcc-13Debian:14all versions · no fixed version listedand 3 other packages
  • gcc-13Debian:13all versions · no fixed version listedand 1 other package
  • gcc-14Echoall versions · fixed in 14.2.0-19+e4
  • gcc-3.3Ubuntu:14.04:LTSall versions · no fixed version listedand 5 other packages
  • gcc-4.8Ubuntu:16.04:LTSall versions · no fixed version listedand 22 other packages

11 more package ranges on OSV.dev

Vendor advisories

  • CVE-2026-115455 Red Hat Product Security13 products fixed · 97 known affected

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

    cpp as a component of Red Hat Enterprise Linux 10 · gcc-c++ as a component of Red Hat Enterprise Linux 10 · gcc-gfortran as a component of Red Hat Enterprise Linux 10 · +94 more

  • RHSA-2026:94989 Red Hat Product Security13 products fixed

    Red Hat Security Advisory: Red Hat Hardened Images RPMs Security Update

Full record on NVD

Fix

  1. Vendor fix Red Hat Product Security RHSA-2026:94989 · 13 productsFor details on how to apply this update, which includes the changes described in this advisory, refer to: https://images.redhat.com/
  2. Workaround from the vendor Red Hat Product Security RHSA-2026:94989 · 13 productsMitigation 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.
  3. No fix available, says the vendor Red Hat Product Security CVE-2026-115455 · 42 productsFix deferred
  4. No fix available, says the vendor Red Hat Product Security CVE-2026-115455 · 55 productsAffected

Detection

Nuclei template
none so far
ProjectDiscovery
Exploit-DB
no entry
Exploit-DB
Proof of concept
Metasploit modules
none listed
Metasploit Framework

Sources

Identifiers

Technical details

CVSS v3 Vector
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:H
Published
2026-10-30
Last Modified
2026-11-05
NVD status
Awaiting Analysis
GitHub Advisory
GHSA-jgwq-jmrj-p95p

Frequently asked questions

What is CVE-2026-115455?

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).

Is CVE-2026-115455 actively exploited?

Active exploitation of CVE-2026-115455 has not been confirmed. Its EPSS score was 0.3% on 2026-11-08, the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2026-115455?

CVE-2026-115455 has a CVSS v3 base score of 6.5 (MEDIUM severity), with vector string CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:H.

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