How severe is GHSA-g753-ghr7-q33w?

No CVSS score has been assigned to GHSA-g753-ghr7-q33w yet. Review the advisory details and affected package list to assess your exposure.

Which packages are affected by GHSA-g753-ghr7-q33w?

GHSA-g753-ghr7-q33w affects the following packages: cyfs-base (crates.io). Ecosystems affected: crates.io.

How do I fix GHSA-g753-ghr7-q33w?

The records we use list no patched version of cyfs-base for GHSA-g753-ghr7-q33w. Check the maintainer's advisory, and where your build allows, override or pin the dependency away from the vulnerable range.

How do I detect GHSA-g753-ghr7-q33w in my crates.io dependencies?

Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for cyfs-base, including transitive dependencies — a direct dependency you never call can still pull in a vulnerable version.

How do I mitigate GHSA-g753-ghr7-q33w if there is no patch (or I can't update yet)?

If you can't upgrade right away: gate or disable the affected feature, validate untrusted input at the boundary, and avoid passing attacker-controlled data into the vulnerable path. O3's runtime protection blocks exploitation in production as an interim safeguard until the upgrade lands.

Is GHSA-g753-ghr7-q33w actively exploited in the wild?

No public exploit code has been indexed for GHSA-g753-ghr7-q33w yet. This does not mean the vulnerability cannot be exploited — absence of public exploits does not imply safety. Apply the recommended fix and use O3 Security to monitor your exposure.

When was GHSA-g753-ghr7-q33w published, and has it been updated?

GHSA-g753-ghr7-q33w was published on June 22, 2023 and was last updated on November 8, 2023. Advisory data evolves as severity scores, affected ranges, and exploit intelligence are revised — always check the latest version of the advisory before acting.

🦀 crates.io

Not in CISA KEV

cyfs-base vulnerable to misaligned pointer dereference in `ChunkId::new`GHSA-g753-ghr7-q33w

Fix: buckyos/CYFS@e030188

GHSA-g753-ghr7-q33w is a security vulnerability in cyfs-base. The records list no fixed version yet; check the vendor advisory below and apply the mitigations in the meantime.

Also known asRUSTSEC-2023-0046

Published

Jun 22, 2023

Updated

Nov 8, 2023

Affected

1 pkg

Patched

See advisory

Exploits

None indexed

Exploitation data as of Nov 8, 2023 · OSV.dev, FIRST.org (EPSS)

Real-World Exposure

1 pkg affected

🦀cyfs-base

Real-time download stats are indexed for npm and PyPI packages. This vulnerability affects crates.io packages — download data is not available via public APIs for these ecosystems.

Description

The function ChunkId::new creates a misaligned pointer by casting mutable pointer of u8 slice which has alignment 1 to the mutable pointer of u32 which has alignment 4, and dereference the misaligned pointer leading UB, which should not be allowed in safe function.

Affected Packages

1 total

Ecosystem	Package	Vulnerable range	Fix
🦀crates.io	`cyfs-base`	all versions	No fix

Detection & mitigation playbook

Open-source dependency

Detect
Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for cyfs-base, including transitive dependencies — a direct dependency you never call can still pull in a vulnerable version.
Remediation status
The records we use list no patched version of cyfs-base for GHSA-g753-ghr7-q33w. Check the maintainer's advisory, and where your build allows, override or pin the dependency away from the vulnerable range.
Mitigate without a patch
If you can't upgrade right away: gate or disable the affected feature, validate untrusted input at the boundary, and avoid passing attacker-controlled data into the vulnerable path. O3's runtime protection blocks exploitation in production as an interim safeguard until the upgrade lands.

Frequently Asked Questions

The function `ChunkId::new` creates a misaligned pointer by casting mutable pointer of `u8` slice which has alignment 1 to the mutable pointer of `u32` which has alignment 4, and dereference the misaligned pointer leading UB, which should not be allowed in safe function.

O3 Security · Impact-Aware SCA

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