CVE-2023-30903: HP-UX could be exploited locally to create a Denial of Service (DoS) when any physical interface is configured

Q: How do I fix CVE-2023-30903?

hp-ux: upgrade to newer than 11.31. Exact commands for each OS are on this page.

Q: Is CVE-2023-30903 being exploited?

CVE-2023-30903 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2023-30903 affect?

CVE-2023-30903 affects hp-ux. Severity is medium (CVSS 5.5). HP-UX could be exploited locally to create a Denial of Service (DoS) when any physical interface is configured with IPv6/inet6.

Q: How urgent is CVE-2023-30903?

Priority 21/100. No elevated risk signals yet.

Routine

MEDIUM 5.5UPGRADE

CVE-2023-30903 is a medium-severity flaw (CVSS 5.5) affecting hp-ux. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

HP-UX could be exploited locally to create a Denial of Service (DoS) when any physical interface is configured with IPv6/inet6.

Why this priority

No elevated risk signals yet

A fixed release or distro patch exists.

Risk facts

CVSS score	5.5 (Medium)
Attack vector	Local
Attack complexity	Low
Privileges needed	Low
User interaction	None
EPSS exploit chance	0.2% (top 93%)
CISA exploited list	No
Weakness	CWE-770
Published	2023-06-16
Last modified	2026-06-17

Publisher (CNA): Hewlett Packard Enterprise (HPE) · Vendor: hp

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2023-06-16 21:15 UTCPublished CVE record published
2026-06-17 05:55 UTCUpdated Record last modified

hp hp-ux UPGRADE

Affected: >= 11.00 and <= 11.31

Fixed in: newer than 11.31

Safe to downgrade to: a release before 11.00

Check your OS release

cat /etc/os-release; uname -r

Debian / Ubuntu

sudo apt update && sudo apt full-upgrade

RHEL / Amazon Linux / Fedora

sudo dnf upgrade --refresh

Windows

Install the latest cumulative update from Windows Update

If no patch exists yet

OS downgrades are not safe. Apply the vendor mitigation from the advisory and restrict exposure.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2023-30903?

hp-ux: upgrade to newer than 11.31. Exact commands for each OS are on this page.

Is CVE-2023-30903 being exploited?

CVE-2023-30903 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2023-30903 affect?

CVE-2023-30903 affects hp-ux. Severity is medium (CVSS 5.5). HP-UX could be exploited locally to create a Denial of Service (DoS) when any physical interface is configured with IPv6/inet6.

How urgent is CVE-2023-30903?

Priority 21/100. No elevated risk signals yet.

Related CVEs

CVE-2000-0515 HIGH 10.0 MITIGATE The snmpd.conf configuration file for the SNMP daemon (snmpd) in HP-UX 11.0 is world writable, which allows lo
CVE-2000-1028 HIGH 7.2 MITIGATE Buffer overflow in cu program in HP-UX 11.0 may allow local users to gain privileges via a long -l command lin
CVE-2000-0966 MEDIUM 4.6 MITIGATE Buffer overflows in lpspooler in the fileset PrinterMgmt.LP-SPOOL of HP-UX 11.0 and earlier allows local users
CVE-2000-0972 MEDIUM 5.5 MITIGATE HP-UX 11.00 crontab allows local users to read arbitrary files via the -e option by creating a symlink to the
CVE-1999-0307 HIGH 7.2 MITIGATE Buffer overflow in HP-UX cstm program allows local users to gain root privileges.

References

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