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Fencer Vulns
medium 5.5

CVE-2022-33070 json

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.

published 2022-06-22 4 y ago modified 2026-10-08 31 d ago also EUVD-2022-36127

cvss
5.5
version 3.1, NVD
cisa kev
Not listed
not in CISA's catalog
epss
1.1%
EPSS 1.1% chance of exploitation in 30 days, percentile 66%
public exploits
0
none known

Summary

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.

Patch / fix

  • protobuf-c Debian 14, Debian 13, Debian 12 1.4.1-1

debian advisories DEBIAN-CVE-2022-33070

  • sudo Ubuntu 22.04 LTS 1.9.9-1ubuntu2.2
  • protobuf-c Ubuntu 20.04 LTS 1.3.3-1ubuntu0.1
  • protobuf-c Ubuntu 22.04 LTS 1.3.3-1ubuntu2.1

ubuntu advisories UBUNTU-CVE-2022-33070

Ubuntu security data © Canonical Ltd., from https://github.com/canonical/ubuntu-security-notices via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

  • protobuf-c Alpine 3.24, Alpine 3.23, Alpine 3.22 +5 more 1.4.1-r0

alpine advisories ALPINE-CVE-2022-33070

Alpine secdb © Alpine Linux, from https://secdb.alpinelinux.org via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

  • protobuf-c CBL-Mariner 2.0 1.4.0-2

azure linux advisories AZL-9973

Azure Linux vulnerability data, Copyright (c) Microsoft Corporation, from https://github.com/microsoft/AzureLinuxVulnerabilityData via OSV, under the MIT licence; changed: normalised to fixed package versions per release. MIT

  • protobuf-c Arch Linux 1.4.1-1

arch linux advisories AVG-2826

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2022-33070 updated cvss 3.1

protobuf-c: invalid arithmetic shift via the function parse_tag_and_wiretype may lead to DoS

  • Red Hat Enterprise Linux 7 protobuf-c, protobuf-c-compiler
    affected: workaround, no fix planned “Out of support scope”
  • Red Hat Enterprise Linux 8 protobuf-c, protobuf-c-compiler Red Hat Enterprise Linux 9 protobuf-c, protobuf-c-compiler
    affected: workaround, no fix available “Fix deferred”
  • Red Hat OpenShift AI (RHOAI) rhoai/odh-training-operator-rhel9
    not affected: vulnerable code not present

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

CISA SSVC

Exploitation
none
Automatable
no
Technical impact
partial
Assessed
31 d ago

Exploit prediction

1.11% chance of exploitation in the next 30 days, higher than 66% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

  • github.com https://github.com/protobuf-c/protobuf-c/pull/508 referenced PoC, tagged "exploit" by a source, unverified
  • github.com https://github.com/protobuf-c/protobuf-c/issues/506 referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by version score vector
NVD 3.1 5.5 CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
NVD 2.0 4.3 AV:N/AC:M/Au:N/C:N/I:N/A:P

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.