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Fencer Intel
critical 9.8

CVE-2016-9427 json

Integer overflow vulnerability in bdwgc before 2016-09-27 allows attackers to cause client of bdwgc denial of service (heap buffer overflow…

published 2016-12-12 9 y ago modified 2026-06-17 4 mo ago also EUVD-2016-10237

cvss
9.8
version 3.1, NVD
cisa kev
Not listed
not in CISA's catalog
epss
4.1%
EPSS 4.1% chance of exploitation in 30 days, percentile 90%
public exploits
0
none known

Summary

Integer overflow vulnerability in bdwgc before 2016-09-27 allows attackers to cause client of bdwgc denial of service (heap buffer overflow crash) and possibly execute arbitrary code via huge allocation.

Patch / fix

  • libgc Debian 14, Debian 13, Debian 12 1:7.6.4-0.3

debian advisories DEBIAN-CVE-2016-9427

  • libgc Ubuntu 14.04 LTS 1:7.2d-5ubuntu2.1
  • libgc Ubuntu 16.04 LTS 1:7.4.2-7.3ubuntu0.1

ubuntu advisories UBUNTU-CVE-2016-9427

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

  • gc SLES for SAP 12 SP2, SLES for SAP 12 SP1, SLES for Raspberry Pi 12 SP2 +6 more 7.2d-5.1

suse advisories SUSE-SU-2016:3057-1

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-2016-9427 updated cvss 7.5

gc: Integer overflow in GC_MALLOC_ATOMIC

  • Red Hat Enterprise Linux 6 gc, cpp, gcc, libgcc, libgcj, libitm, +15 more Red Hat Enterprise Linux 7 gc
    affected: no fix planned “Will not fix”

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

Exploit prediction

4.14% chance of exploitation in the next 30 days, higher than 90% of all scored CVEs (FIRST EPSS, 2026-11-09).

CVSS scores

assigned by version score vector
NVD 3.1 9.8 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
NVD 2.0 7.5 AV:N/AC:L/Au:N/C:P/I:P/A:P

Classification

Weakness
  • CWE-119 Improper Restriction of Operations within the Bounds of a Memory Buffer
  • CWE-190 Integer Overflow or Wraparound

References

Sources

Fencer Intel 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.