CVE-2026-95619 Gcc: libstdc++ integer overflow in `new` operator
High 7.7
Published
Updated
Check this codebase for CVE-2026-95619 and fix it if it is affected.
What it is: CVE-2026-95619 is a high-severity vulnerability in Red Hat Enterprise Linux 10, published on 22 Sep 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2026-95619 in the wild and no public exploit code.
Affected product: Red Hat Enterprise Linux 10. No package-level version data is available, so check the vendor advisory linked from the reference page.
Task:
1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.
2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.
3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.
4. Run the tests and summarise what changed and why.
5. If nothing in the project is affected, say so and change nothing.
Reference: https://insights.sbomify.com/CVE-2026-95619/ (Markdown: https://insights.sbomify.com/CVE-2026-95619/index.md)
An integer overflow in libstdc++ aligned new operator can cause undersized memory allocation, leading to memory corruption or application instability.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-95619?
CVE-2026-95619 is a high-severity vulnerability in Red Hat Enterprise Linux 10, published on 22 Sep 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
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.
Weakness: CWE-190
Which versions are affected by CVE-2026-95619?
Linux distribution packages (40)
cpp Red Hat:hummingbird:1 | All versions | 0:16.2.1-2.hum1 |
gcc Red Hat:hummingbird:1 | All versions | 0:16.2.1-2.hum1 |
gcc-c++ Red Hat:hummingbird:1 | All versions | 0:16.2.1-2.hum1 |
gcc-gdb-plugin Red Hat:hummingbird:1 | All versions | 0:16.2.1-2.hum1 |
gcc-gfortran Red Hat:hummingbird:1 | All versions | 0:16.2.1-2.hum1 |
gcc-offload-amdgcn Red Hat:hummingbird:1 | All versions | 0:16.2.1-2.hum1 |
gcc-offload-nvptx Red Hat:hummingbird:1 | All versions | 0:16.2.1-2.hum1 |
gcc-plugin-annobin Red Hat:hummingbird:1 | All versions | 0:16.2.1-2.hum1 |
gcc-plugin-devel Red Hat:hummingbird:1 | All versions | 0:16.2.1-2.hum1 |
gcc13 Red Hat:hummingbird:1 | All versions | 0:13.5.0-0.1.hum1 |
gcc13-c++ Red Hat:hummingbird:1 | All versions | 0:13.5.0-0.1.hum1 |
gcc13-gfortran Red Hat:hummingbird:1 | All versions | 0:13.5.0-0.1.hum1 |
gcc13-plugin-annobin Red Hat:hummingbird:1 | All versions | 0:13.5.0-0.1.hum1 |
libasan Red Hat:hummingbird:1 | All versions | 0:16.2.1-2.hum1 |
libasan-static Red Hat:hummingbird:1 | All versions | 0:16.2.1-2.hum1 |
libatomic Red Hat:hummingbird:1 | All versions | 0:16.2.1-2.hum1 |
libgcc Red Hat:hummingbird:1 | All versions | 0:16.2.1-2.hum1 |
libgccjit Red Hat:hummingbird:1 | All versions | 0:16.2.1-2.hum1 |
libgccjit-devel Red Hat:hummingbird:1 | All versions | 0:16.2.1-2.hum1 |
libgdiagnostics Red Hat:hummingbird:1 | All versions | 0:16.2.1-2.hum1 |
libgdiagnostics-devel Red Hat:hummingbird:1 | All versions | 0:16.2.1-2.hum1 |
libgfortran Red Hat:hummingbird:1 | All versions | 0:16.2.1-2.hum1 |
libgfortran-static Red Hat:hummingbird:1 | All versions | 0:16.2.1-2.hum1 |
libgomp Red Hat:hummingbird:1 | All versions | 0:16.2.1-2.hum1 |
libgomp-offload-amdgcn Red Hat:hummingbird:1 | All versions | 0:16.2.1-2.hum1 |
libgomp-offload-nvptx Red Hat:hummingbird:1 | All versions | 0:16.2.1-2.hum1 |
libhwasan Red Hat:hummingbird:1 | All versions | 0:16.2.1-2.hum1 |
libhwasan-static Red Hat:hummingbird:1 | All versions | 0:16.2.1-2.hum1 |
libitm Red Hat:hummingbird:1 | All versions | 0:16.2.1-2.hum1 |
libitm-devel Red Hat:hummingbird:1 | All versions | 0:16.2.1-2.hum1 |
libitm-static Red Hat:hummingbird:1 | All versions | 0:16.2.1-2.hum1 |
liblsan Red Hat:hummingbird:1 | All versions | 0:16.2.1-2.hum1 |
liblsan-static Red Hat:hummingbird:1 | All versions | 0:16.2.1-2.hum1 |
libquadmath Red Hat:hummingbird:1 | All versions | 0:16.2.1-2.hum1 |
libquadmath-devel Red Hat:hummingbird:1 | All versions | 0:16.2.1-2.hum1 |
libquadmath-static Red Hat:hummingbird:1 | All versions | 0:16.2.1-2.hum1 |
libstdc++ Red Hat:hummingbird:1 | All versions | 0:16.2.1-2.hum1 |
libstdc++-devel Red Hat:hummingbird:1 | All versions | 0:16.2.1-2.hum1 |
libstdc++-docs Red Hat:hummingbird:1 | All versions | 0:16.2.1-2.hum1 |
libstdc++-static Red Hat:hummingbird:1 | All versions | 0:16.2.1-2.hum1 |
How do I fix CVE-2026-95619?
Apply the vendor's patch.
Is CVE-2026-95619 being exploited?
There is no known exploitation of CVE-2026-95619 in the wild and no public exploit code.
Sources
Also known as AZL-107975, DEBIAN-CVE-2026-95619, ECHO-6fa8-503e-6f0c, GHSA-9cg4-x5gg-7ww7, RHSA-2026:58503, RHSA-2026:67275 and 3 more.