CVE-2024-23440: Vba32 Antivirus v3.36.0 is vulnerable to an Arbitrary Memory Read vulnerability. The 0x22200B IOCTL code of th

Routine

HIGH 7.1DOWNGRADE

CVE-2024-23440 is a high-severity flaw (CVSS 7.1) affecting vba32. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Vba32 Antivirus v3.36.0 is vulnerable to an Arbitrary Memory Read vulnerability. The 0x22200B IOCTL code of the Vba32m64.sys driver allows to read up to 0x802 of memory from ar arbitrary user-supplied pointer.

Why this priority

High severity

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

Risk facts

CVSS score	7.1 (High)
Attack vector	Local
Attack complexity	Low
Privileges needed	Low
User interaction	None
EPSS exploit chance	0.2% (top 89%)
CISA exploited list	No
Weakness	CWE-125
Published	2024-02-13
Last modified	2026-06-17

Publisher (CNA): Fluid Attacks · Vendor: anti-virus

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

Am I affected?

Timeline

2024-02-13 15:15 UTCPublished CVE record published
2026-06-17 07:12 UTCUpdated Record last modified

anti-virus vba32 DOWNGRADE

Affected: 3.36.0

Fixed in: no fixed release known

Safe to downgrade to: a release before 3.36.0

1. Check installed version

apt-cache policy vba32 || rpm -q vba32 || vba32 --version

2. No fixed release: DOWNGRADE to a release before 3.36.0 (Debian / Ubuntu)

apt-cache madison vba32 sudo apt install vba32=<VERSION_BEFORE_3.36.0> sudo apt-mark hold vba32

2. No fixed release: DOWNGRADE (RHEL / Amazon Linux / Fedora)

dnf --showduplicates list vba32 sudo dnf downgrade vba32-<VERSION_BEFORE_3.36.0> sudo dnf versionlock add vba32

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-2024-23440?

vba32: downgrade or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2024-23440 being exploited?

CVE-2024-23440 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-2024-23440 affect?

CVE-2024-23440 affects vba32. Severity is high (CVSS 7.1). Vba32 Antivirus v3.36.0 is vulnerable to an Arbitrary Memory Read vulnerability. The 0x22200B IOCTL code of the Vba32m64.sys driver allows to read up to 0x802 of memory from ar arbitrary user-supplied pointer.

How urgent is CVE-2024-23440?

Priority 28/100. High severity

Related CVEs

CVE-2024-23441 MEDIUM 5.5 DOWNGRADE Vba32 Antivirus v3.36.0 is vulnerable to a Denial of Service vulnerability by triggering the 0x2220A7 IOCTL co
CVE-2024-23439 HIGH 7.1 DOWNGRADE Vba32 Antivirus v3.36.0 is vulnerable to an Arbitrary Memory Read vulnerability by triggering the 0x22201B, 0x

References

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