What is CVE-2023-31284?

CVE-2023-31284 is a high-severity vulnerability in Illumos Illumos-Gate, classified under Out-of-bounds Write. CVSS score: 7.8/10. Published 2023-05-04.

How severe is CVE-2023-31284?

High severity. CVSS v3 base score is 7.8 out of 10.

Buffer overflow in Illumos Illumos-Gate

CVE-2023-31284

illumos illumos-gate before 676abcb has a stack buffer overflow in /dev/net, leading to privilege escalation via a stat on a long file name in /dev/net.

Vulnerability class: Buffer Overflow

Published 2023-05-04 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 7.8 (High). Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.003 (18.1th percentile), scored 2026-09-30.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 18th percentile — 18.1% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.003 · newest: 0.003 · change: 0.000

Affected products

Illumos Illumos-Gate

Weakness classification (CWE)

CWE-787 — Out-of-bounds Write

References

github.com/illumos/illumos-gate/tree/16b76d3cb933ff92018a2a75594449010192eacb (Product)
illumos.topicbox.com/groups/developer/T13ef186a53edeb5c-M821cc18b5884e04e16daa8… (Issue Tracking)
www.openwall.com/lists/oss-security/2023/09/13/4 (mailing-list)
www.openwall.com/lists/oss-security/2023/09/13/5 (mailing-list)
www.openwall.com/lists/oss-security/2023/09/14/4 (mailing-list)

Frequently asked questions

What is CVE-2023-31284?: CVE-2023-31284 is a high-severity vulnerability in Illumos Illumos-Gate, classified under Out-of-bounds Write. CVSS score: 7.8/10. Published 2023-05-04.
How severe is CVE-2023-31284?: High severity. CVSS v3 base score is 7.8 out of 10.