How severe is CVE-2026-21996?

CVE-2026-21996 has a CVSS 3.x base score of 3.3, rated low severity. It is exploitable over local access with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability low.

Is CVE-2026-21996 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (2nd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-21996?

CVE-2026-21996 primarily affects Oracle Linux. In total, 3 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2026-21996?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

Does CVE-2026-21996 have an EU (EUVD) identifier?

Yes. CVE-2026-21996 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-26700.

When was CVE-2026-21996 published?

CVE-2026-21996 was published on 2026-05-01 and last updated on 2026-06-17.

CVE-2026-21996

CVE-2026-21996 is a low-severity vulnerability in Oracle Linux with a CVSS 3.x base score of 3.3. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-369.

Key facts

Severity: Low (CVSS 3.x base score 3.3)
EPSS exploit prediction: 0% (2nd percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-26700
Weakness: CWE-369
Affected product: Oracle Linux
Published: 2026-05-01
Last modified: 2026-06-17

Description

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()

Frequently asked questions

What is 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()
How severe is CVE-2026-21996?: CVE-2026-21996 has a CVSS 3.x base score of 3.3, rated low severity. It is exploitable over local access with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability low.
Is CVE-2026-21996 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (2nd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-21996?: CVE-2026-21996 primarily affects Oracle Linux. In total, 3 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2026-21996?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2026-21996 have an EU (EUVD) identifier?: Yes. CVE-2026-21996 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-26700.
When was CVE-2026-21996 published?: CVE-2026-21996 was published on 2026-05-01 and last updated on 2026-06-17.

References

https://linux.oracle.com/cve/CVE-2026-21996.html

Affected products (3)

cpe:2.3:o:oracle:linux:8:-:*:*:*:*:*:*
cpe:2.3:o:oracle:linux:9:0:*:*:*:*:*:*
cpe:2.3:o:oracle:linux:10:0:*:*:*:*:*:*

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