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Low 25 Bitcoin

rust: update toolchain to 1.92

Public commit record

What the developer wrote

Authored by Marko Bencun

80/100 · Strong
rust: update toolchain to 1.92

There is a breaking change about abort_immediate_panic, see
CMakeLists.txt.

Also called `cargo update --precise 0.2.177 libc` in src/rust to align
the libc we use with the one in stdlib, to avoid a duplicate dep.
✓ Descriptive subject✓ Names a concrete action or component✓ Provides detailed explanatory context✓ Explains rationale or failure mode
The short version

What changed, and why it matters

This commit updates the Rust compiler toolchain from an unspecified earlier version to Rust 1.92 for the BitBox02 hardware wallet firmware. It also refreshes many vendored third-party Rust libraries (such as libc, hashbrown, getopts) and build tools (cbindgen, bindgen). The stated reason is compatibility with the new toolchain, including a breaking change around panic handling. There is no direct evidence in the commit that this fixes a known security vulnerability, but toolchain and dependency updates can affect security-relevant behavior such as memory safety, panic handling, and type definitions used in cryptographic code.

Recommended action

Treat this as a routine but security-relevant maintenance update. Verify that the firmware builds reproducibly with Rust 1.92, run the project's full test suite including hardware-in-the-loop tests if available, and review release notes for Rust 1.92 and the upgraded crates (especially libc and hashbrown) for any security advisories. Because this is a large dependency refresh on a hardware wallet, perform additional regression testing of cryptographic operations and secure-storage flows before release.

Security signals we found

01

Toolchain update to Rust 1.92, which may include upstream compiler/runtime security fixes

02

Vendored libc upgrade from 0.2.174 to 0.2.177, including type/constant corrections and new API bindings

03

Vendored hashbrown upgrade with likely/unlikely reimplementation using #[cold]

04

Vendored getopts upgrade making unicode-width optional

05

Build tool updates (cbindgen, bindgen-cli) that affect generated C/Rust bindings

06

Reference to a breaking change in abort_immediate_panic handling

Risk score

Why this scored 25/100

Our methodology →
Potential impact 5/30
Exploitability 3/25
Stealth signal 3/15
Affected reach 8/15
Confidence 4/10
Evidence quality 2/5
Human-validated context

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