{"id":"GHSA-xw5j-gv2g-mjm2","aliases":["RUSTSEC-2023-0014"],"status":"published","title":"Miscompilation in cortex-m-rt 0.7.1 and 0.7.2","description":"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","facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":true},"published":"2023-02-13T12:00:00Z","modified":"2023-11-08T04:24:34Z","fixes":[{"ecosystem":"crates.io","package":"cortex-m-rt","fixed_in":["0.7.3"],"sources":["ghsa","osv"]}],"affected":[{"source":"ghsa","ecosystem":"crates.io","package":"cortex-m-rt","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0.7.0"},{"fixed":"0.7.3"}]}]},{"source":"osv","ecosystem":"crates.io","package":"cortex-m-rt","ranges":[{"type":"SEMVER","events":[{"introduced":"0.7.0"},{"fixed":"0.7.3"}]}]},{"source":"osv","ecosystem":"crates.io","package":"cortex-m-rt","ranges":[{"type":"SEMVER","events":[{"introduced":"0.7.1-0"},{"fixed":"0.7.3"}]}]}],"references":[{"url":"https://github.com/rust-embedded/cortex-m/discussions/469","tags":["web"]},{"url":"https://rustsec.org/advisories/RUSTSEC-2023-0014.html","tags":["web","advisory"]},{"url":"https://github.com/advisories/GHSA-xw5j-gv2g-mjm2"},{"url":"https://github.com/rust-embedded/cortex-m","tags":["package"]},{"url":"https://crates.io/crates/cortex-m-rt","tags":["package"]}],"sources":{"ghsa":[{"id":"GHSA-xw5j-gv2g-mjm2","title":"Miscompilation in cortex-m-rt 0.7.1 and 0.7.2","description":"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\n","status":"published","published":"2023-02-14T21:53:37Z","modified":"2023-02-14T21:53:38Z","updated_at":"2026-11-02T14:36:45.67005Z"}],"osv":[{"id":"GHSA-xw5j-gv2g-mjm2","title":"Miscompilation in cortex-m-rt 0.7.1 and 0.7.2","description":"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\n","status":"published","published":"2023-02-14T21:53:37Z","modified":"2023-11-08T04:24:34.246767Z","updated_at":"2026-11-02T15:47:00.604718Z"},{"id":"RUSTSEC-2023-0014","title":"Miscompilation in cortex-m-rt 0.7.1 and 0.7.2","description":"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","status":"published","published":"2023-02-13T12:00:00Z","modified":"2023-11-08T04:24:34.246767Z","updated_at":"2026-11-02T15:53:39.971022Z"}]}}