Memory Access Vulnerability in Slab Library by Tokio
CVE-2025-55159

5.1MEDIUM

Key Information:

Vendor

Tokio-rs

Status
Slab
Vendor
CVE Published:
11 August 2025

What is CVE-2025-55159?

In version 0.4.10 of the Slab library, there is a flaw in the 'get_disjoint_mut' method where it inadequately verified whether indices were within the slab's capacity rather than its actual length. This oversight can lead to access to uninitialized memory, resulting in unpredictable behavior or application crashes. Users are advised to update to version 0.4.11, which rectifies this issue. As a temporary workaround, it is recommended to avoid using the 'get_disjoint_mut' method with indices that exceed the slab's length.

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Affected Version(s)

slab >= 0.4.10, < 0.4.11

References

https://github.com/tokio-rs/slab/security/advisories/GHSA...
x_refsource_CONFIRM
https://github.com/tokio-rs/slab/pull/152
x_refsource_MISC
https://github.com/tokio-rs/slab/commit/2d65c514bc964b192...
x_refsource_MISC

CVSS V4

Score:
5.1
Severity:
MEDIUM
Confidentiality:
Low
Integrity:
None
Availability:
None
Attack Vector:
Local
Attack Complexity:
Low
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
None

Timeline

  • Vulnerability published

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