CVE-2022-33070

Name: CVE-2022-33070
Creator: NVD / NIST
Published: 2022-06-23T17:15:14.43+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 5.5/10EPSS 1.06%

Last modified Jun 17, 2026

CVE-2022-33070 is a medium-severity vulnerability rated 5.5/10 on the CVSS scale. Protobuf-c v1.4.0 was discovered to contain an invalid arithmetic shift via the function parse_tag_and_wiretype in protobuf-c/protobuf-c.c. This vulnerability allows attackers to cause a Denial of Service (DoS) via unspecified vectors.. EPSS estimates a 1.06% chance of exploitation in the next 30 days.

Description

Protobuf-c v1.4.0 was discovered to contain an invalid arithmetic shift via the function parse_tag_and_wiretype in protobuf-c/protobuf-c.c. This vulnerability allows attackers to cause a Denial of Service (DoS) via unspecified vectors.

Metrics

CVSS 3.1

5.5/10

CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H

EPSS Probability

1.06%

60.2th percentile

Probability of exploitation in the next 30 days. Learn more

Affected Software

Vendor	Product	Versions
Protobuf-C Project	Protobuf-C	1.4.0
Fedoraproject	Fedora	36

References

https://github.com/protobuf-c/protobuf-c/issues/506Exploit, Issue Tracking, Patch, Third Party Advisory
https://github.com/protobuf-c/protobuf-c/pull/508Exploit, Issue Tracking, Patch, Third Party Advisory
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/FFN2GHUEGTSHRD7J5PKQ5DRSJSEQ2IKN/
https://github.com/protobuf-c/protobuf-c/issues/506Exploit, Issue Tracking, Patch, Third Party Advisory
https://github.com/protobuf-c/protobuf-c/pull/508Exploit, Issue Tracking, Patch, Third Party Advisory
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/FFN2GHUEGTSHRD7J5PKQ5DRSJSEQ2IKN/

Timeline

Published: Jun 23, 2022
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2022-33070?

How severe is CVE-2022-33070?

CVE-2022-33070 has a CVSS score of 5.5/10 (MEDIUM severity). The EPSS model estimates a 1.06% probability of exploitation in the next 30 days.

How do I fix CVE-2022-33070?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2022-33070?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST