CVE-2025-55159 MEDIUM

CVE-2025-55159: slab allows out-of-bounds access in `get_disjoint_mut` due to incorrect bounds check

Vendor Tokio-Rs
Product slab
Weakness CWE-119
Published August 11, 2025
Last update August 12, 2025

CVSS base score

5.1/10
Attack vector Local
Attack complexity Low
Privileges required None
User interaction None
Confidentiality
Integrity

CVSS vector

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

What the vulnerability does

01Description

slab is a pre-allocated storage for a uniform data type. In version 0.4.10, the get_disjoint_mut method 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. This has been fixed in slab 0.4.11. A workaround for this issue involves to avoid using get_disjoint_mut with indices that might be beyond the slab's actual length.

Key dates

02Disclosure timeline

August 11, 2025 CVE published
August 12, 2025 Record updated