tokio-rs/slab · Security
slab allows out-of-bounds access in `get_disjoint_mut` due to incorrect bounds check
- GHSA ID
- GHSA-qx2v-8332-m4fv
- CVE ID
- CVE-2025-55159
- Severity
- medium
- Published
- Updated
- CVSS v4
- 5.1 · CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N
Description
Impact
The get_disjoint_mut method in slab v0.4.10 incorrectly checked if indices were within the slab's capacity instead of its length, allowing access to uninitialized memory. This could lead to undefined behavior or potential crashes.
Patches
This has been fixed in slab v0.4.11.
Workarounds
Avoid using get_disjoint_mut with indices that might be beyond the slab's actual length, or upgrade to v0.4.11 or later.
References
CWEs
- CWE-119 · Improper Restriction of Operations within the Bounds of a Memory Buffer
References
- https://github.com/tokio-rs/slab/security/advisories/GHSA-qx2v-8332-m4fv ↗
- https://github.com/tokio-rs/slab/pull/152 ↗
- https://github.com/tokio-rs/slab/commit/2d65c514bc964b192bab212ddf3c1fcea4ae96b8 ↗
- https://nvd.nist.gov/vuln/detail/CVE-2025-55159 ↗
- https://rustsec.org/advisories/RUSTSEC-2025-0047.html ↗
- https://github.com/advisories/GHSA-qx2v-8332-m4fv ↗