What is CVE-2026-21996?

CVE-2026-21996 is a low-severity vulnerability in Oracle Linux, classified under Divide By Zero. CVSS score: 3.3/10. Published 2026-05-01.

How severe is CVE-2026-21996?

Low severity. CVSS v3 base score is 3.3 out of 10.

Vulnerability in Oracle Linux

CVE-2026-21996

An unprivileged attacker can reliably trigger a crash of the dtrace process with a malicious ELF binary due to an integer Divide-by-Zero in Pbuild_file_symtab()

Published 2026-05-01 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 3.3 (Low). Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L.

EPSS exploit prediction

EPSS: 0.001 (1.2th percentile), scored 2026-10-01.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 1st percentile — 1.2% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.001 · newest: 0.001 · change: 0.000

Affected products

Oracle Linux — versions 8, 9, 10
Oracle Corporation Linux — versions 8, 9, 10

Weakness classification (CWE)

CWE-369 — Divide By Zero

References

linux.oracle.com/cve/CVE-2026-21996.html (vendor-advisory, Vendor Advisory)

Frequently asked questions

What is CVE-2026-21996?: CVE-2026-21996 is a low-severity vulnerability in Oracle Linux, classified under Divide By Zero. CVSS score: 3.3/10. Published 2026-05-01.
How severe is CVE-2026-21996?: Low severity. CVSS v3 base score is 3.3 out of 10.