{"id":"RUSTSEC-2023-0014","summary":"Miscompilation in cortex-m-rt 0.7.1 and 0.7.2","details":"Version 0.7.1 of the `cortex-m-rt` crate introduced a regression causing the stack to NOT be eight-byte aligned prior to calling `main` (or any other specified entrypoint), violating the [stack ABI of AAPCS32], the default ABI used by all Cortex-M targets. This regression is also present in version 0.7.2 of the `cortex-m-rt` crate.\n\nThis regression can cause certain compiler optimizations (which assume the eight-byte alignment) to produce incorrect behavior at runtime. This incorrect behavior has been [observed in real-world applications].\n\n**It is advised that ALL users of `v0.7.1` and `v0.7.2` of the `cortex-m-rt` crate update to the latest version (`v0.7.3`), AS SOON AS POSSIBLE.** Users of `v0.7.0` and prior versions of `cortex-m-rt` are not affected by this regression.\n\nIt will be necessary to rebuild all affected firmware binaries, and flash or deploy the new firmware binaries to affected devices.\n\n[stack ABI of AAPCS32]: https://github.com/ARM-software/abi-aa/blob/edd7460d87493fff124b8b5713acf71ffc06ee91/aapcs32/aapcs32.rst#6212stack-constraints-at-a-public-interface\n[observed in real-world applications]: https://github.com/peter9477/test2","aliases":["GHSA-xw5j-gv2g-mjm2"],"modified":"2023-11-08T04:24:34.246767Z","published":"2023-02-13T12:00:00Z","database_specific":{"license":"CC0-1.0"},"references":[{"type":"PACKAGE","url":"https://crates.io/crates/cortex-m-rt"},{"type":"ADVISORY","url":"https://rustsec.org/advisories/RUSTSEC-2023-0014.html"},{"type":"WEB","url":"https://github.com/rust-embedded/cortex-m/discussions/469"}],"affected":[{"package":{"name":"cortex-m-rt","ecosystem":"crates.io","purl":"pkg:cargo/cortex-m-rt"},"ranges":[{"type":"SEMVER","events":[{"introduced":"0.7.1-0"},{"fixed":"0.7.3"}]}],"ecosystem_specific":{"affected_functions":null,"affects":{"functions":[],"os":[],"arch":[]}},"database_specific":{"categories":[],"informational":"unsound","cvss":null,"source":"https://github.com/rustsec/advisory-db/blob/osv/crates/RUSTSEC-2023-0014.json"}}],"schema_version":"1.7.3"}