CVE-2022-4064: A vulnerability was found in Dalli up to 3.2.2

This week

LOW 3.7REMOTEUPGRADE

CVE-2022-4064 is a low-severity flaw (CVSS 3.7) affecting dalli. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

A vulnerability was found in Dalli up to 3.2.2. It has been classified as problematic. Affected is the function self.meta_set of the file lib/dalli/protocol/meta/request_formatter.rb of the component Meta Protocol Handler. The manipulation of the argument cas/ttl leads to injection. It is possible to launch the attack remotely. The complexity of an attack is rather high. The exploitability is told to be difficult. The exploit has been disclosed t

Why this priority

Public exploit reference
Remotely exploitable, no login, no user action

A fixed release or distro patch exists.

Risk facts

CVSS score	3.7 (Low)
Attack vector	Network (remote)
Attack complexity	High
Privileges needed	None
User interaction	None
EPSS exploit chance	1.4% (top 28%)
CISA exploited list	No
Weakness	CWE-74, CWE-707
Published	2022-11-19
Last modified	2026-06-17

Publisher (CNA): VulDB · Vendor: dalli project

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

Am I affected?

Timeline

2022-11-19 19:15 UTCPublished CVE record published
2026-06-17 05:19 UTCUpdated Record last modified

dalli project dalli UPGRADE

Affected: >= - and < 3.2.3

Fixed in: 3.2.3

Safe to downgrade to: a release before -

1. Check installed version

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

2. UPGRADE to 3.2.3 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade dalli

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade dalli

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 - (Debian / Ubuntu)

apt-cache madison dalli sudo apt install dalli=<VERSION_BEFORE_-> sudo apt-mark hold dalli

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

dnf --showduplicates list dalli sudo dnf downgrade dalli-<VERSION_BEFORE_-> sudo dnf versionlock add dalli

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-2022-4064?

dalli: upgrade to 3.2.3. Exact commands for each OS are on this page.

Is CVE-2022-4064 being exploited?

CVE-2022-4064 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-2022-4064 affect?

CVE-2022-4064 affects dalli. Severity is low (CVSS 3.7). A vulnerability was found in Dalli up to 3.2.2. It has been classified as problematic. Affected is the function self.meta_set of the file lib/dalli/protocol/meta/request_formatter.rb of the component Meta Protocol Handler. The manipulation

How urgent is CVE-2022-4064?

Priority 41/100. Public exploit reference; Remotely exploitable, no login, no user action

References

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