CVE catalog
CVE-2020-5235
nanopb: CVE-2020-5235
- Severity
- Medium · CVSS 5
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:L/A:L - Published
- Source
- [NVD] · [CVE record]
- EPSS
- 1.73% · Oct 25, 2026
There is a potentially exploitable out of memory condition In Nanopb before 0.4.1, 0.3.9.5, and 0.2.9.4. When nanopb is compiled with PB_ENABLE_MALLOC, the message to be decoded contains a repeated string, bytes or message field and realloc() runs out of memory when expanding the array nanopb can end up calling `free()` on a pointer value that comes from uninitialized memory. Depending on platform this can result in a crash or further memory corruption, which may be exploitable in some cases. This problem is fixed in nanopb-0.4.1, nanopb-0.3.9.5, nanopb-0.2.9.4.
Vulnerable and fixed packages
Distribution-reported package versions and fixes. These do not depend on matching against the OpenFactory package catalog.
| Distribution | Package | Release | Version | Status |
|---|---|---|---|---|
| Debian | nanopb | sid | 0.4.9.1-2 | not affected |
| Debian | nanopb | forky | 0.4.9.1-2 | not affected |
| Debian | nanopb | trixie | 0.4.9.1-1 | not affected |
| Debian | nanopb | bookworm | 0.4.7-2 | not affected |
Fixed-version evidence
| Distribution | Package | Type | Release | Fixed version | Urgency | Origin | Bugs |
|---|---|---|---|---|---|---|---|
| Debian | nanopb | source | sid | Not affected | unimportant | Not reported | Not reported |
| Debian | nanopb | source | forky | Not affected | unimportant | Not reported | Not reported |
| Debian | nanopb | source | trixie | Not affected | unimportant | Not reported | Not reported |
| Debian | nanopb | source | bookworm | Not affected | unimportant | Not reported | Not reported |
OpenFactory catalog packages
[Debian 12 (Bookworm)]
- [libnanopb-dev]Not affected
Source package: [nanopb]
Details (2)
0.4.7-2· amd64 · bookwormNot affected
dsa · nanopb · debian · bookworm
0.4.7-2· arm64 · bookwormNot affected
dsa · nanopb · debian · bookworm
- [nanopb]Not affected
Details (2)
0.4.7-2· all · bookwormNot affected
dsa · nanopb · debian · bookworm
0.4.7-2· all · bookwormNot affected
dsa · nanopb · debian · bookworm
Observed: