PatchTheCVECVE-2026-13367: IBM Informix Dynamic Server 14.10, and 15.0 contain a local privilege escalation vulnerability in the oninit s
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Routine
HIGH 7.8DOWNGRADE
CVE-2026-13367 is a high-severity flaw (CVSS 7.8) affecting informix dynamic server. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.
IBM Informix Dynamic Server 14.10, and 15.0 contain a local privilege escalation vulnerability in the oninit setuid-root utility.
Why this priority
- High severity
No fix is published yet: follow the downgrade or mitigation steps.
Risk facts
| CVSS score | 7.8 (High) |
| Attack vector | Local |
| Attack complexity | Low |
| Privileges needed | Low |
| User interaction | None |
| EPSS exploit chance | 0.1% (top 97%) |
| CISA exploited list | No |
| Weakness | CWE-284 |
| Published | 2026-08-12 |
| Last modified | 2026-10-23 |
Publisher (CNA): IBM Corporation · Vendor: ibm
Am I affected?
Timeline
- Published CVE record published
- Updated Record last modified
ibm informix dynamic server DOWNGRADE
Affected: 14.10 · 15.0
Fixed in: no fixed release known
Safe to downgrade to: a release before 14.10
1. Check installed version
apt-cache policy informix-dynamic-server || rpm -q informix-dynamic-server || informix-dynamic-server --version
2. No fixed release: DOWNGRADE to a release before 14.10 (Debian / Ubuntu)
apt-cache madison informix-dynamic-server
sudo apt install informix-dynamic-server=<VERSION_BEFORE_14.10>
sudo apt-mark hold informix-dynamic-server
2. No fixed release: DOWNGRADE (RHEL / Amazon Linux / Fedora)
dnf --showduplicates list informix-dynamic-server
sudo dnf downgrade informix-dynamic-server-<VERSION_BEFORE_14.10>
sudo dnf versionlock add informix-dynamic-server
Downgrade risk
Downgrading can break dependent software and may reopen older bugs. Read the distro advisory first and test on a non-production host.
After downgrade
Restart the service, and keep the package held until a fixed release ships.
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.
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.
Related CVEs
- CVE-2026-13361 HIGH 8.8 UPGRADE IBM Informix oninit sq_sgkprepare RCE via unchecked SQL Interface length field.
- CVE-2026-13476 HIGH 7.3 UPGRADE IBM Informix Dynamic Server 14.10, 15.0, and 12.10 could allow an unauthenticated user to execute arbitrary co