# CVE-2024-53984: nanopb: Nanopb is a small code-size Protocol Buffers implementation

CVE-2024-53984 is fixed in nanopb on 1 platform, first by DEBIAN-CVE-2024-53984, released December 2, 2024. It is not reported as exploited. Patch Radar priority: Routine.

- Web page: https://patchblox.com/security/cve/CVE-2024-53984
- Priority: Routine
- CVSS: 4.3 (medium)
- EPSS: 0.0041
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Dec 2, 2024

## Description

Nanopb is a small code-size Protocol Buffers implementation.  When the compile time option PB_ENABLE_MALLOC is enabled, the message contains at least one field with FT_POINTER field type, custom stream callback is used with unknown stream length. and the pb_decode_ex() function is used with flag PB_DECODE_DELIMITED, then the pb_decode_ex() function does not automatically call pb_release(), like is done for other failure cases. This could lead to memory leak and potential denial-of-service. This vulnerability is fixed in 0.4.9.1.

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | nanopb Debian 13.5 (trixie) | 0.4.9.1-1 | [DEBIAN-CVE-2024-53984](https://patchblox.com/security/data/fix/linux/debian-cve-2024-53984.md) | Dec 2, 2024 |
| Linux | nanopb Debian 14 | 0.4.9.1-1 | [DEBIAN-CVE-2024-53984](https://patchblox.com/security/data/fix/linux/debian-cve-2024-53984.md) | Dec 2, 2024 |
| Linux | nanopb opensuse-leap 15.6 | 0.4.6-bp156.4.3.1 | [OPENSUSE-SU-2024:0400-1](https://patchblox.com/security/data/fix/linux/opensuse-su-2024-0400-1.md) | Dec 9, 2024 |

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Data as of 2026-11-09T13:31:49Z UTC. Source: Patchblox Patch Radar (https://patchblox.com/security/patch-radar). Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo

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