Description
libmodbus v3.1.10 is vulnerable to Buffer Overflow via the modbus_write_bits function. This issue can be triggered when the function is fed with specially crafted input, which leads to out-of-bounds read and can potentially cause a crash or other unintended behaviors.
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.
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 26.10 | libmodbus | No fix yet | — |
| Ubuntu 26.04 LTS | libmodbus | No fix yet | — |
| Ubuntu 25.10 | libmodbus | No fix yet | — |
| Ubuntu 24.04 LTS | libmodbus | No fix yet | — |
| Ubuntu 22.04 LTS | libmodbus | No fix yet | — |
Show 4 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 20.04 LTS | libmodbus | No fix yet | — |
| Ubuntu Pro 18.04 LTS | libmodbus | No fix yet | — |
| Ubuntu Pro 16.04 LTS | libmodbus | No fix yet | — |
| Ubuntu Pro 14.04 LTS | libmodbus | No fix yet | — |