GHSA-6g2r-675j-hx59
xxhash-rust: Safe xxh3 custom-secret API accepts too-short secret in release
GHSA-6g2r-675j-hx59 is a low vulnerability (CVSS 2.3) in xxhash-rust, published October 2, 2026. No source lists public exploit code. Fixed in xxhash-rust 0.8.16.
- Severity
- 2.3 LowCVSS 3.1, GitHub Advisories
- Exploit chance
- UnscoredNo EPSS score yet
- Exploitation
- None knownNot on CISA’s or ENISA’s lists
- Fixed in
0.8.16xxhash-rust
Description
I have a minimized safe Rust witness for xxhash-rust 0.8.15.
Safe public route:
xxhash_rust::xxh3::xxh3_64_with_secret(&[0x41], &[])
The caller-side harness contains no unsafe code. Under release execution, the internal minimum custom-secret length predicate is enforced only by debug_assert!. Release-Miri reports construction of a fixed-width reference beyond the empty secret allocation.
Observed diagnostic:
Undefined Behavior: constructing invalid value of type &[u8; 4]: encountered a dangling reference
Local repair evidence: handling custom-secret slices shorter than the internal minimum before fixed-width secret reads makes the same safe short-secret harness pass under Linux release-Miri.
Local artifacts:
- vulnerable log: artifacts/logs/W-4332_xxhash_rust_short_secret_miri_release_linux_001.log
- repair log: artifacts/logs/differentials/W-4332_xxhash_rust_local_repair_miri_release_linux_001.log
- report: artifacts/reports/W-4332_xxhash_rust_short_secret_report.md
Attack profile
How easy it is to exploit
- Attack vector
- Local
- Complexity
- Low
- Privileges needed
- High
- User interaction
- None
What an attacker can affect
- Confidentiality
- Low
- Integrity
- None
- Availability
- None
Affected packages
| Package | Affected | Fixed |
|---|---|---|
xxhash-rustcrates.io | before 0.8.16 | 0.8.16 |
What each source reports
GitHub Advisories Score used
xxhash-rust: Safe xxh3 custom-secret API accepts too-short secret in release
I have a minimized safe Rust witness for xxhash-rust 0.8.15.
Safe public route:
xxhash_rust::xxh3::xxh3_64_with_secret(&[0x41], &[])
The caller-side harness contains no unsafe code. Under release execution, the internal minimum custom-secret length predicate is enforced only by debug_assert!. Release-Miri reports construction of a fixed-width reference beyond the empty secret allocation.
Observed diagnostic:
Undefined Behavior: constructing invalid value of type &[u8; 4]: encountered a dangling reference
Local repair evidence: handling custom-secret slices shorter than the internal minimum before fixed-width secret reads makes the same safe short-secret harness pass under Linux release-Miri.
Local artifacts:
- vulnerable log: artifacts/logs/W-4332_xxhash_rust_short_secret_miri_release_linux_001.log
- repair log: artifacts/logs/differentials/W-4332_xxhash_rust_local_repair_miri_release_linux_001.log
- report: artifacts/reports/W-4332_xxhash_rust_short_secret_report.md
- Record
GHSA-6g2r-675j-hx59- CVSS 3.1
- 2.3 Low
CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:L/I:N/A:N - Weakness
- CWE-125
- Updated
- 2026-11-02
OSV
xxhash-rust: Safe xxh3 custom-secret API accepts too-short secret in release
I have a minimized safe Rust witness for xxhash-rust 0.8.15.
Safe public route:
xxhash_rust::xxh3::xxh3_64_with_secret(&[0x41], &[])
The caller-side harness contains no unsafe code. Under release execution, the internal minimum custom-secret length predicate is enforced only by debug_assert!. Release-Miri reports construction of a fixed-width reference beyond the empty secret allocation.
Observed diagnostic:
Undefined Behavior: constructing invalid value of type &[u8; 4]: encountered a dangling reference
Local repair evidence: handling custom-secret slices shorter than the internal minimum before fixed-width secret reads makes the same safe short-secret harness pass under Linux release-Miri.
Local artifacts:
- vulnerable log: artifacts/logs/W-4332_xxhash_rust_short_secret_miri_release_linux_001.log
- repair log: artifacts/logs/differentials/W-4332_xxhash_rust_local_repair_miri_release_linux_001.log
- report: artifacts/reports/W-4332_xxhash_rust_short_secret_report.md
- Record
GHSA-6g2r-675j-hx59- CVSS 3.1
- 2.3 Low
CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:L/I:N/A:N - Weakness
- CWE-125
- Updated
- 2026-11-02
History
| Recorded | Changed | Sources |
|---|---|---|
| first indexed | GitHub Advisories, OSV |
Dates are when Every CVE recorded each change. Upstream dates may differ.