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CVE-2026-18096: IBM Db2 12.1.5 for Linux, UNIX and Windows (includes DB2 Connect Server) could allow a local attacker to cause

17
Routine
LOW 3.3WATCHLISTDOWNGRADEDOWNGRADEDOWNGRADE

CVE-2026-18096 is a low-severity flaw (CVSS 3.3) affecting db2, db2, db2. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

IBM Db2 12.1.5 for Linux, UNIX and Windows (includes DB2 Connect Server) could allow a local attacker to cause a denial of service due to a memory leak.

Why this priority

  • On your watchlist

No fix is published yet: follow the downgrade or mitigation steps.

Risk facts

CVSS score3.3 (Low)
Attack vectorLocal
Attack complexityLow
Privileges neededLow
User interactionNone
EPSS exploit chance0.1% (top 98%)
CISA exploited listNo
WeaknessCWE-770
Published2026-08-12
Last modified2026-10-23
Publisher (CNA): IBM Corporation · Vendor: ibm

Am I affected?

Timeline

ibm db2 DOWNGRADE
Affected: 12.1.5
Fixed in: no fixed release known
Safe to downgrade to: a release before 12.1.5
1. Check installed version
apt-cache policy db2 || rpm -q db2 || db2 --version
2. No fixed release: DOWNGRADE to a release before 12.1.5 (Debian / Ubuntu)
apt-cache madison db2 sudo apt install db2=<VERSION_BEFORE_12.1.5> sudo apt-mark hold db2
2. No fixed release: DOWNGRADE (RHEL / Amazon Linux / Fedora)
dnf --showduplicates list db2 sudo dnf downgrade db2-<VERSION_BEFORE_12.1.5> sudo dnf versionlock add db2
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.
ibm db2 DOWNGRADE
Affected: 12.1.5
Fixed in: no fixed release known
Safe to downgrade to: a release before 12.1.5
1. Check installed version
apt-cache policy db2 || rpm -q db2 || db2 --version
2. No fixed release: DOWNGRADE to a release before 12.1.5 (Debian / Ubuntu)
apt-cache madison db2 sudo apt install db2=<VERSION_BEFORE_12.1.5> sudo apt-mark hold db2
2. No fixed release: DOWNGRADE (RHEL / Amazon Linux / Fedora)
dnf --showduplicates list db2 sudo dnf downgrade db2-<VERSION_BEFORE_12.1.5> sudo dnf versionlock add db2
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.
ibm db2 DOWNGRADE
Affected: 12.1.5
Fixed in: no fixed release known
Safe to downgrade to: a release before 12.1.5
1. Check installed version
apt-cache policy db2 || rpm -q db2 || db2 --version
2. No fixed release: DOWNGRADE to a release before 12.1.5 (Debian / Ubuntu)
apt-cache madison db2 sudo apt install db2=<VERSION_BEFORE_12.1.5> sudo apt-mark hold db2
2. No fixed release: DOWNGRADE (RHEL / Amazon Linux / Fedora)
dnf --showduplicates list db2 sudo dnf downgrade db2-<VERSION_BEFORE_12.1.5> sudo dnf versionlock add db2
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.

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References

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