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.
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
Debian
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian 14 | protobuf-c | 1.4.1-1 | — |
| Debian 13 | protobuf-c | 1.4.1-1 | — |
| Debian 12 | protobuf-c | 1.4.1-1 | — |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 26.10 | argyll +5 | No fix yet | — |
| Ubuntu 26.04 LTS | argyll +5 | No fix yet | — |
| Ubuntu 25.10 | argyll +5 | No fix yet | — |
| Ubuntu 24.04 LTS | argyll +6 | No fix yet | — |
| Ubuntu 22.04 LTS | argyll +6 | No fix yet | — |
| Ubuntu 22.04 LTS | protobuf-c | 1.3.3-1ubuntu2.1 | USN-5531-1 |
| Ubuntu 22.04 LTS | sudo | 1.9.9-1ubuntu2.2 | USN-5811-1 |
Show 4 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 20.04 LTS | argyll +5 | No fix yet | — |
| Ubuntu 20.04 LTS | protobuf-c | 1.3.3-1ubuntu0.1 | USN-5531-1 |
| Ubuntu 20.04 LTS | sudo | 1.8.31-1ubuntu1.4 | USN-5811-1 |
| Ubuntu 18.04 LTS | argyll +5 | No fix yet | — |
| Ubuntu 18.04 LTS | sudo | 1.8.21p2-3ubuntu1.5 | USN-5811-1 |
| Ubuntu 16.04 LTS | argyll +4 | No fix yet | — |
| Ubuntu 14.04 LTS | pidgin +1 | No fix yet | — |
Alpine
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine v3.24 | protobuf-c | 1.4.1-r0 | — |
| Alpine v3.23 | protobuf-c | 1.4.1-r0 | — |
| Alpine v3.22 | protobuf-c | 1.4.1-r0 | — |
| Alpine v3.21 | protobuf-c | 1.4.1-r0 | — |
| Alpine v3.20 | protobuf-c | 1.4.1-r0 | — |
Show 3 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine v3.19 | protobuf-c | 1.4.1-r0 | — |
| Alpine v3.18 | protobuf-c | 1.4.1-r0 | — |
| Alpine v3.17 | protobuf-c | 1.4.1-r0 | — |
Amazon Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Amazon Linux 2023 | protobuf-c +2 | 1.4.1-2.amzn2023.0.2 | ALAS2023-2023-086 |
| Amazon Linux 2 | protobuf-c +2 | 1.0.2-3.amzn2.0.3 | ALAS2-2024-2619 |
Azure Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Azure Linux 2 (CBL-Mariner) | protobuf-c | 1.4.0-2 | — |
Advisories 4
- USN-5531-1 protobuf-c vulnerability Ubuntu Security Notices (USN) · Apr 27, 2026
- USN-5811-1 sudo vulnerabilities Ubuntu Security Notices (USN) · Apr 27, 2026
- ALAS2-2024-2619 Low: protobuf-c security update (Amazon Linux 2) Amazon Linux Security Center (ALAS) · Aug 13, 2024
- ALAS2023-2023-086 Low: protobuf-c security update (Amazon Linux 2023) Amazon Linux Security Center (ALAS) · Feb 22, 2023