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NVD / CVE Program· CNA redhat

CVE-2026-95619: Gcc: libstdc++ integer overflow in `new` operator

HighCVSS 7.7 · v3.1—No exploit Fix available

Noroxi assessment

Priority: Monitor (action score 30/100)

  • The sources we track (CISA KEV, Exploit-DB, Metasploit, Nuclei, GitHub) show no public exploit code or exploitation in the wild.
  • Probability of exploitation in the next 30 days: 0.44% (FIRST EPSS).
  • Anyone who can reach it over the internet can trigger it. No account or password is required. No user action is required. Special conditions such as timing or configuration are required.
  • Fixed version: azl3 gcc 13.2.0-7 on Azure Linux 3.0 Release Notes.

Low priority for now. Upgrade to azl3 gcc 13.2.0-7 on Azure Linux 3.0 Release Notes or later.

Generated automatically from the record's data: CVSS (NVD and CNA), CISA KEV and SSVC, FIRST EPSS, exploit sources, fixed versions. How we calculate it

Primary sources: NVD · CVE.org · FIRST EPSS

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.

Published
Sep 22, 2026
Updated
Nov 11, 2026
EPSS
0.4% · 39th percentile

Report tools

JSON

Action score

30

Monitor

Low priority for now.

CVSS
30 / 40 · 7.7 / 10
CISA KEV
0 / 30 · Not listed
EPSS
0 / 30 · 0.4%

CISA SSVC decision

Exploitation
none
Automatable
no
Technical impact
partial

Vulnrichment: CISA's decision-tree inputs.

CNA vs NVD score

NVD
—
CNA · redhat
7.7
NVD has not scored this yet; the score shown is the CNA’s.

The score given by the assigning authority versus NVD’s independent score. A gap means the severity is contested.

Get told when this record changes

  • Not in KEV: no record of exploitation in the wild
  • No public exploit code on record
  • A fix has been released

If any of these changes, we'll tell you in the daily email digest.

Follow CVE-2026-95619

When you'll hear from us

  • when it enters CISA KEV
  • when exploit code appears or is weaponized
  • when the record is updated (including a fixed version)
  • when EPSS rises 20 points in a week

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Noroxi analysis

What does it mean in your environment?

The assessment above is generated automatically from the record's data; it doesn't know your environment. Our team verifies on your systems whether this vulnerability is actually exploitable and which mitigation is enough.

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Affected systems

Is your version affected?

Pick the product and type the version you run. It's compared with this record's version ranges in your browser; the version isn't sent anywhere.

—

Versions reported by the vendor

Affected version ranges reported by the assigning authority (redhat). Independent of NVD's CPE analysis and usually ahead of it.

  • Red Hat Red Hat Enterprise Linux 10

    • all versionsunknown
    • all versionsunknown

  • Red Hat Red Hat Enterprise Linux 6

    • all versionsunknown
    • all versionsunknown
    • all versionsunknown
    • all versionsunknown
    • all versionsunknown

  • Red Hat Red Hat Enterprise Linux 7

    • all versionsunknown
    • all versionsunknown
    • all versionsunknown
    • all versionsunknown

  • Red Hat Red Hat Enterprise Linux 8

    • 0:8.5.0-30.el8_10 and laternot affected · rpm
    • 0:8.5.0-30.el8_10 and laternot affected · rpm
    • all versionsaffected
    • all versionsaffected

  • Red Hat Red Hat Enterprise Linux 9

    • 0:11.5.0-16.el9_9 and laternot affected · rpm
    • 0:11.5.0-16.el9_9 and laternot affected · rpm
    • all versionsaffected

  • Red Hat Red Hat Enterprise Linux 9.8 Extended Update Support

    • 0:11.5.0-15.el9_8 and laternot affected · rpm

  • Red Hat Red Hat Hardened Images

    • 16.2.1-2.hum1 and laternot affected · rpm
    • 13.5.0-0.1.hum1 and laternot affected · rpm

  • Red Hat Red Hat OpenShift AI (RHOAI)

    • all versionsunknown
    • all versionsunknown
    • all versionsunknown
    • all versionsunknown
    • all versionsunknown
    • all versionsunknown
    • all versionsunknown
    • all versionsunknown
    • all versionsunknown
    • all versionsunknown

  • Red Hat Red Hat OpenShift Container Platform 4

    • all versionsunknown
    • all versionsaffected

  • Red Hat Red Hat OpenShift Container Platform 5

    • all versionsaffected

Package-level exposure

OSV and GitHub Advisory data: ecosystem, package and range. SBOM matching uses this table.

EcosystemPackageAffected rangeFix
AlmaLinux:8cppbefore 8.5.0-30.el8_10.alma.18.5.0-30.el8_10.alma.1
AlmaLinux:8gccbefore 8.5.0-30.el8_10.alma.18.5.0-30.el8_10.alma.1
AlmaLinux:8gcc-c++before 8.5.0-30.el8_10.alma.18.5.0-30.el8_10.alma.1
AlmaLinux:8gcc-gdb-pluginbefore 8.5.0-30.el8_10.alma.18.5.0-30.el8_10.alma.1
AlmaLinux:8gcc-gfortranbefore 8.5.0-30.el8_10.alma.18.5.0-30.el8_10.alma.1
AlmaLinux:8gcc-offload-nvptxbefore 8.5.0-30.el8_10.alma.18.5.0-30.el8_10.alma.1
AlmaLinux:8gcc-plugin-annobinbefore 8.5.0-30.el8_10.alma.18.5.0-30.el8_10.alma.1
AlmaLinux:8gcc-plugin-develbefore 8.5.0-30.el8_10.alma.18.5.0-30.el8_10.alma.1
AlmaLinux:8libasanbefore 8.5.0-30.el8_10.alma.18.5.0-30.el8_10.alma.1
AlmaLinux:8libatomicbefore 8.5.0-30.el8_10.alma.18.5.0-30.el8_10.alma.1
AlmaLinux:8libatomic-staticbefore 8.5.0-30.el8_10.alma.18.5.0-30.el8_10.alma.1
AlmaLinux:8libgccbefore 8.5.0-30.el8_10.alma.18.5.0-30.el8_10.alma.1
AlmaLinux:8libgfortranbefore 8.5.0-30.el8_10.alma.18.5.0-30.el8_10.alma.1
AlmaLinux:8libgfortran-staticbefore 8.5.0-30.el8_10.alma.18.5.0-30.el8_10.alma.1
AlmaLinux:8libgompbefore 8.5.0-30.el8_10.alma.18.5.0-30.el8_10.alma.1
AlmaLinux:8libgomp-offload-nvptxbefore 8.5.0-30.el8_10.alma.18.5.0-30.el8_10.alma.1
AlmaLinux:8libitmbefore 8.5.0-30.el8_10.alma.18.5.0-30.el8_10.alma.1
AlmaLinux:8libitm-develbefore 8.5.0-30.el8_10.alma.18.5.0-30.el8_10.alma.1
AlmaLinux:8liblsanbefore 8.5.0-30.el8_10.alma.18.5.0-30.el8_10.alma.1
AlmaLinux:8libquadmathbefore 8.5.0-30.el8_10.alma.18.5.0-30.el8_10.alma.1
AlmaLinux:8libquadmath-develbefore 8.5.0-30.el8_10.alma.18.5.0-30.el8_10.alma.1
AlmaLinux:8libquadmath-staticbefore 8.5.0-30.el8_10.alma.18.5.0-30.el8_10.alma.1
AlmaLinux:8libstdc++before 8.5.0-30.el8_10.alma.18.5.0-30.el8_10.alma.1
AlmaLinux:8libstdc++-develbefore 8.5.0-30.el8_10.alma.18.5.0-30.el8_10.alma.1

+59

Same product

red hat: all records

Other highest-scoring records for the same primary product.

  • CVE-2026-90954Busybox: busybox: dpkg-deb extraction-root escape via per-ar-member deferred symlink flush
    31Monitor
  • CVE-2026-96512Sudo: sudo: tz environment variable allows bypass of notbefore/notafter time-based authorization
    31Monitor
  • CVE-2026-78410Util-linux: util-linux: restricted bind mounts do not pin the source, allowing x-mount.owner/group/mode redirection
    31Monitor

Published before and after this one in the same product

  • ← EarlierCVE-2026-42784Sep 16, 2026 · Sequoia-openpgp: sequoia-openpgp: cryptographic integrity compromise via key flag confusion
    29Monitor
  • ← EarlierCVE-2026-76781Sep 17, 2026 · Libxml2: libxml2: null pointer dereference parsing nextcatalog without catalog attribute
    22Monitor
  • Later →CVE-2026-88830Sep 23, 2026 · Busybox: busybox: tls montgomery reduction allocates bytes instead of digits, causing a pre-auth heap buffer overflow
    30Monitor

Remediation

Which version to upgrade to

Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.

Product / packageFixed versionSource
azl3 gcc 13.2.0-7 on Azure Linux 3.0Release NotesMicrosoft (MSRC)
almalinux:cpp8.5.0-30.el8_10.alma.1 · AlmaLinux:8Package registry (OSV)
almalinux:gcc8.5.0-30.el8_10.alma.1 · AlmaLinux:8Package registry (OSV)
almalinux:gcc-c++8.5.0-30.el8_10.alma.1 · AlmaLinux:8Package registry (OSV)
almalinux:gcc-gdb-plugin8.5.0-30.el8_10.alma.1 · AlmaLinux:8Package registry (OSV)
almalinux:gcc-gfortran8.5.0-30.el8_10.alma.1 · AlmaLinux:8Package registry (OSV)
almalinux:gcc-offload-nvptx8.5.0-30.el8_10.alma.1 · AlmaLinux:8Package registry (OSV)
almalinux:gcc-plugin-annobin8.5.0-30.el8_10.alma.1 · AlmaLinux:8Package registry (OSV)
almalinux:gcc-plugin-devel8.5.0-30.el8_10.alma.1 · AlmaLinux:8Package registry (OSV)
almalinux:libasan8.5.0-30.el8_10.alma.1 · AlmaLinux:8Package registry (OSV)
almalinux:libatomic8.5.0-30.el8_10.alma.1 · AlmaLinux:8Package registry (OSV)
almalinux:libatomic-static8.5.0-30.el8_10.alma.1 · AlmaLinux:8Package registry (OSV)
almalinux:libgcc8.5.0-30.el8_10.alma.1 · AlmaLinux:8Package registry (OSV)
debian:gcc-1313.5.0-3 · Debian:14Package registry (OSV)
debian:gcc-1414.4.0-3 · Debian:14Package registry (OSV)
debian:gcc-1515.3.0-5 · Debian:14Package registry (OSV)
debian:gcc-1616.2.0-4 · Debian:14Package registry (OSV)
opensuse:gcc77.5.0+r278197-25.1 · openSUSE:TumbleweedPackage registry (OSV)
red hat:cpp0:16.2.1-2.hum1 · Red Hat:hummingbird:1Package registry (OSV)
red hat:gcc0:16.2.1-2.hum1 · Red Hat:hummingbird:1Package registry (OSV)
red hat:gcc-c++0:16.2.1-2.hum1 · Red Hat:hummingbird:1Package registry (OSV)
red hat:gcc-gdb-plugin0:16.2.1-2.hum1 · Red Hat:hummingbird:1Package registry (OSV)
red hat:gcc-gfortran0:16.2.1-2.hum1 · Red Hat:hummingbird:1Package registry (OSV)
red hat:gcc-offload-amdgcn0:16.2.1-2.hum1 · Red Hat:hummingbird:1Package registry (OSV)
red hat:gcc-offload-nvptx0:16.2.1-2.hum1 · Red Hat:hummingbird:1Package registry (OSV)
red hat:gcc-plugin-annobin0:16.2.1-2.hum1 · Red Hat:hummingbird:1Package registry (OSV)
red hat:gcc-plugin-devel0:16.2.1-2.hum1 · Red Hat:hummingbird:1Package registry (OSV)
red hat:libasan0:16.2.1-2.hum1 · Red Hat:hummingbird:1Package registry (OSV)
red hat:libasan-static0:16.2.1-2.hum1 · Red Hat:hummingbird:1Package registry (OSV)
red hat:libatomic0:16.2.1-2.hum1 · Red Hat:hummingbird:1Package registry (OSV)

+3

Exploit status

No known public exploit

No public exploit has been observed yet. That doesn't mean you're safe, only that the bar is a little higher.

Research context

For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.

Timeline

From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.

No dated events beyond publication.

EPSS, last 120 days

FIRST EPSS daily score; only changes of 0.01 or more are recorded (step chart).

Variant candidates

Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.

  • CVE-2026-4460548 days apartRpm: heap buffer overflow in ndb slot table parsing
    22Monitor
  • CVE-2026-0988244 days apartGlib: glib: denial of service via integer overflow in g_buffered_input_stream_peek()
    14Monitor

Not on record for this CVE: patch commit or PR link · researcher credit · public bounty program.

Technical details

Attack conditions

  • Anyone who can reach it over the internet can trigger it.
  • No account or password is required.
  • No user action is required.
  • Special conditions such as timing or configuration are required.

If successful

Confidentiality
low · data can be read
Integrity
high · data or configuration can be modified
Availability
high · the service can be disrupted
Attack vector
Network
Attack complexity
High
Privileges required
None
User interaction
None
Scope
Unchanged
Confidentiality impact
Low
Integrity impact
High
Availability impact
High

Weakness class (CWE)

CWE-190 · Integer Overflow or Wraparound

CVSS vector

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:H/A:H

nvd-secondary

Attack context

MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.

ATT&CK techniques

—

References

Show all references (6 more)

Vendor advisories and official records. Exploit/PoC links are deliberately left out.

All records