CVE-2026-16660: IBM Db2 Mirror for i 7.4, 7.5, and 7.6 could allow a remote attacker to cause a denial of service due to an ou

Routine

MEDIUM 5.3REMOTEUPGRADE

CVE-2026-16660 is a medium-severity flaw (CVSS 5.3) affecting db2 mirror for i. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

IBM Db2 Mirror for i 7.4, 7.5, and 7.6 could allow a remote attacker to cause a denial of service due to an out-of-bounds read.

Why this priority

Remotely exploitable, no login, no user action

A fixed release or distro patch exists.

Risk facts

CVSS score	5.3 (Medium)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	0.5% (top 58%)
CISA exploited list	No
Weakness	CWE-125
Published	2026-09-04
Last modified	2026-09-10

Publisher (CNA): IBM Corporation · Vendor: ibm

Last updated 2026-09-10 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-09-04 17:16 UTCPublished CVE record published
2026-09-10 21:17 UTCUpdated Record last modified

ibm db2 mirror for i UPGRADE

Affected: >= 7.4 and <= 7.6

Fixed in: newer than 7.6

Safe to downgrade to: a release before 7.4

1. Check installed version

apt-cache policy db2-mirror-for-i || rpm -q db2-mirror-for-i || db2-mirror-for-i --version

2. UPGRADE to newer than 7.6 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade db2-mirror-for-i

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade db2-mirror-for-i

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

3. If no update is available yet, DOWNGRADE to a release before 7.4 (Debian / Ubuntu)

apt-cache madison db2-mirror-for-i sudo apt install db2-mirror-for-i=<VERSION_BEFORE_7.4> sudo apt-mark hold db2-mirror-for-i

3. If no update is available yet, DOWNGRADE (RHEL / Amazon Linux / Fedora)

dnf --showduplicates list db2-mirror-for-i sudo dnf downgrade db2-mirror-for-i-<VERSION_BEFORE_7.4> sudo dnf versionlock add db2-mirror-for-i

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.

Quick answers

How do I fix CVE-2026-16660?

db2 mirror for i: upgrade to newer than 7.6. Exact commands for each OS are on this page.

Is CVE-2026-16660 being exploited?

CVE-2026-16660 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-2026-16660 affect?

CVE-2026-16660 affects db2 mirror for i. Severity is medium (CVSS 5.3). IBM Db2 Mirror for i 7.4, 7.5, and 7.6 could allow a remote attacker to cause a denial of service due to an out-of-bounds read.

How urgent is CVE-2026-16660?

Priority 34/100. Remotely exploitable, no login, no user action

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References

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