What is CVE-2017-9431?

CVE-2017-9431 is a critical-severity vulnerability in Grpc, classified under Out-of-bounds Write. CVSS score: 9.8/10. Published 2017-06-05.

How severe is CVE-2017-9431?

Critical severity. CVSS v3 base score is 9.8 out of 10.

Buffer overflow in Grpc

CVE-2017-9431

Google gRPC before 2017-04-05 has an out-of-bounds write caused by a heap-based buffer overflow related to core/lib/iomgr/error.c.

Vulnerability class: Buffer Overflow

Published 2017-06-05 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.024 (83.1th percentile), scored 2026-09-29.

Low probability of exploitation in the next 30 days, but still tracked. 83rd percentile — 83.1% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.024 · newest: 0.024 · change: 0.000

Affected products

Grpc

Weakness classification (CWE)

CWE-787 — Out-of-bounds Write

References

github.com/grpc/grpc/pull/10492 (Patch, Third Party Advisory)
bugs.chromium.org/p/oss-fuzz/issues/detail (Patch, VDB Entry, Third Party Advisory, Issue Tracking)

Frequently asked questions

What is CVE-2017-9431?: CVE-2017-9431 is a critical-severity vulnerability in Grpc, classified under Out-of-bounds Write. CVSS score: 9.8/10. Published 2017-06-05.
How severe is CVE-2017-9431?: Critical severity. CVSS v3 base score is 9.8 out of 10.