Which products and versions are affected by CVE-1999-0128?

Affected: Sng (Ibm) versions 2.1, 2.2; Osf 1 (Digital) versions 1.3.3; Aix (Ibm) versions 3.2, 4.1, 4.2, among others. The full list is in the CVE brief.

Is CVE-1999-0128 being exploited in the wild?

It is not listed in any known-exploited vulnerabilities catalog.

Is CVE-1999-0128 in the CISA KEV catalog?

No, it is not currently listed in the CISA Known Exploited Vulnerabilities catalog.

Is there a public exploit for CVE-1999-0128?

Public exploit code is available.

Is there a fix for CVE-1999-0128?

No fixed version is listed yet; check the vendor advisory for mitigations.

How urgently should CVE-1999-0128 be patched?

Brandefense priority: patch immediately, because it is very likely to be exploited soon.

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Vulnerability Intelligence

CVE-1999-0128

MediumPublic exploit

Oversized ICMP ping packets can result in a denial of service, aka Ping o' Death.

Published Dec 18, 1996 · Updated Apr 15, 2026

Key Facts

Patch immediately

CVE-1999-0128 is a medium-severity vulnerability (CVSS 5.0 v2) affecting Sng (Ibm), Osf 1 (Digital), Aix (Ibm) and 6 more products.
It is not listed in any known-exploited vulnerabilities catalog. Public exploit code is available.
EPSS estimates a 75% probability of exploitation in the next 30 days.
No fixed version is listed yet; check the vendor advisory for mitigations.
Brandefense priority: patch immediately, because it is very likely to be exploited soon.

CVSS v2

5.0

AV:N/AC:L/Au:N/C:N/I:N/A:P

EPSS (30-day exploit likelihood)

75%

Higher than 99.4% of all scored CVEs

Exploited in the wild

No known

Not in a known-exploited catalog

Public exploit code

Available

Proof-of-concept or weaponized module

Get the full CVE-1999-0128 brief as a PDF

Every affected product and fixed release, exploitation status and a first 24 hours response checklist, emailed within minutes.

Description

Oversized ICMP ping packets can result in a denial of service, aka Ping o' Death.

Affected Products

21 affected entries in total

Product	Affected versions	Fixed in
SngIbm	2.1, 2.2	n/a
Osf 1Digital	1.3.3	n/a
AixIbm	3.2, 4.1, 4.2	n/a
Linux KernelLinux	1.3.0, 2.0	n/a
Internet FaststartSco	1.0, 1.1	n/a

4 more affected products in the full CVE brief

Timeline

Publicly disclosed
Dec 18, 1996
Last updated
Apr 15, 2026

References

FAQ

Common Questions.

Oversized ICMP ping packets can result in a denial of service, aka Ping o' Death.
Affected: Sng (Ibm) versions 2.1, 2.2; Osf 1 (Digital) versions 1.3.3; Aix (Ibm) versions 3.2, 4.1, 4.2, among others. The full list is in the CVE brief.
It is not listed in any known-exploited vulnerabilities catalog.
No, it is not currently listed in the CISA Known Exploited Vulnerabilities catalog.
Public exploit code is available.
No fixed version is listed yet; check the vendor advisory for mitigations.
Brandefense priority: patch immediately, because it is very likely to be exploited soon.

Is CVE-1999-0128 Running On Your Attack Surface?

Brandefense maps vulnerabilities like this one to your internet-facing assets and tells you exactly where to patch.