CVE-2022-31163: TZInfo is a Ruby library that provides access to time zone data and allows times to be converted using time zo

This month

HIGH 7.5WATCHLISTUPGRADEMITIGATE

CVE-2022-31163 is a high-severity flaw (CVSS 7.5) affecting tzinfo, debian linux. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

TZInfo is a Ruby library that provides access to time zone data and allows times to be converted using time zone rules. Versions prior to 0.36.1, as well as those prior to 1.2.10 when used with the Ruby data source tzinfo-data, are vulnerable to relative path traversal. With the Ruby data source, time zones are defined in Ruby files. There is one file per time zone. Time zone files are loaded with `require` on demand. In the affected versions, `T

Why this priority

High severity
Public exploit reference
On your watchlist

A fixed release or distro patch exists.

Risk facts

CVSS score	7.5 (High)
Attack vector	Network (remote)
Attack complexity	High
Privileges needed	None
User interaction	Required
EPSS exploit chance	2.4% (top 16%)
CISA exploited list	No
Weakness	CWE-22, CWE-23
Published	2022-07-22
Last modified	2026-06-17

Publisher (CNA): GitHub, Inc. · Vendor: debian · tzinfo project

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

Am I affected?

Timeline

2022-07-22 04:15 UTCPublished CVE record published
2026-06-17 04:44 UTCUpdated Record last modified

tzinfo project tzinfo UPGRADE

Affected: < 0.3.61 · >= 1.0.0 and < 1.2.10

Fixed in: 0.3.61, 1.2.10

Safe to downgrade to: a release before 1.0.0

1. Check installed version

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

2. UPGRADE to 0.3.61 (Debian / Ubuntu)

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

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade tzinfo

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 1.0.0 (Debian / Ubuntu)

apt-cache madison tzinfo sudo apt install tzinfo=<VERSION_BEFORE_1.0.0> sudo apt-mark hold tzinfo

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

dnf --showduplicates list tzinfo sudo dnf downgrade tzinfo-<VERSION_BEFORE_1.0.0> sudo dnf versionlock add tzinfo

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.

debian debian linux MITIGATE

Affected: 10.0

Fixed in: no fixed release known

Safe to downgrade to: a release before 10.0

Check your OS release

cat /etc/os-release; uname -r

Debian / Ubuntu

sudo apt update && sudo apt full-upgrade

RHEL / Amazon Linux / Fedora

sudo dnf upgrade --refresh

Windows

Install the latest cumulative update from Windows Update

If no patch exists yet

OS downgrades are not safe. Apply the vendor mitigation from the advisory and restrict exposure.

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-2022-31163?

tzinfo: upgrade to 0.3.61, 1.2.10; debian linux: mitigate or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2022-31163 being exploited?

CVE-2022-31163 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-2022-31163 affect?

CVE-2022-31163 affects tzinfo, debian linux. Severity is high (CVSS 7.5). TZInfo is a Ruby library that provides access to time zone data and allows times to be converted using time zone rules. Versions prior to 0.36.1, as well as those prior to 1.2.10 when used with the Ruby data source tzinfo-data, are vulnerab

How urgent is CVE-2022-31163?

Priority 57/100. High severity; Public exploit reference; On your watchlist

Software pages

Debian vulnerabilities · Ruby vulnerabilities

References

← Back to latest CVEs