CVE-2022-33070

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.

CVSS 3.1

5.5CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H

EPSS

1.1% chance of exploitation in the next 30 days; higher than 65% of CVEs (scores of 2026-10-25)

Published

2022-06-23

Modified

2026-10-08

Record from

the NVD, synced 2026-10-19

Affected

• fedoraproject:fedora
• protobuf-c_project:protobuf-c

References

• https://github.com/protobuf-c/protobuf-c/issues/506
• https://github.com/protobuf-c/protobuf-c/pull/508
• https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/FFN2GHUEGTSHRD7J5PKQ5DRSJSEQ2IKN/
• https://github.com/protobuf-c/protobuf-c/issues/506
• https://github.com/protobuf-c/protobuf-c/pull/508

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