ZDF
Sign inSign up

Vulnerabilities

Security fix · CVE-2025-55159

slab is a pre-allocated storage for a uniform data type.

Published Aug 11, 2025 · catalog updated Aug 12, 2025 · slab is a pre-allocated

Last checked Oct 29, 2026. A connected source was read within the last 7 days.

Check if you run it

No confirmed exploitation is on record for CVE-2025-55159. EPSS is 0.18%. Act only if a listed version of slab is a pre-allocated is installed.

Gaps on this record

  • The stored product name is a package slug. The name on this page is taken from the title (slab is a pre-allocated).
  • No vendor fix or required action is stored. Compare the linked advisory before you change production.
Severity
Medium5.1
Known exploitation
Not in CISA/VulnCheck KEV
EPSS
0.18%
Remediation
Version ranges on file
Affected products
vendor tokio-rs slab 0.4.10, < 0.4.11

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.

Are you affected?

Enter the version you run. The result uses only the ranges stored on this record.

The check returns affected, not affected, or incomplete. It does not guess a version that is missing from the record.

  • vendor tokio-rs slab 0.4.10, < 0.4.110.4.10, < 0.4.11

How to fix CVE-2025-55159

What to do

Three questions, each answered from this record only. Confirm the vendor advisory before you patch.

Should you patch?

No confirmed exploitation is on record for CVE-2025-55159. EPSS is 0.18%. Act only if a listed version of slab is a pre-allocated is installed.

Which versions are affected?

Compare what you have installed with tokio-rs slab 0.4.10, < 0.4.11 0.4.10, < 0.4.11. Compare the installed version with the linked vendor advisory before you change production.

What should an analyst verify?

No weakness class is stored. EPSS 0.18%. There is no CISA KEV listing. No Exploit-DB or Metasploit reference is linked. Use the source links for the original advisory.

Code

The project this record applies to. Exploit listings stay in References.

Timeline

Detection, updates, and resolution for this record.

  1. Aug 11, 2025 · EUVD

    Detected

    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

  2. Aug 12, 2025 · EUVD

    Updated

    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

Sources

  • CVE.orgVulnerability recordCVE-2025-55159

    Official CVE identifier

    cve.org
  • FIRST EPSSExploitation probabilityCVE-2025-55159

    30-day exploitation probability 0.18%

    first.org
  • EUVDVulnerability recordEUVD-2025-24190

    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 potentia

    euvd.enisa.europa.eu

References

Freshness

Last verified in this catalog Oct 29, 2026. Significant claims (KEV, EPSS, CVSS, affected ranges) come from the source rows above — open the original publisher for the authoritative advisory.

  • FIRST EPSSOct 23, 2026
  • CVE.orgOct 21, 2026
  • EUVDOct 20, 2026