CVE-2026-44216

Aliases:RUSTSEC-2026-0114GHSA-p8xm-42r7-89xgDEBIAN-CVE-2026-44216CGA-fp8v-8pww-mm74CGA-hwc9-hx85-pqpgCGA-mx5c-699x-m6fmCGA-xp8f-c3r2-mjxf
Advisory lineage Upstream: 0 Downstream: 5
Modified
Published: 14 May 2026, 14:54
Last modified:28 Jul 2026, 12:04

Vulnerability Summary

Overall Risk (default)
medium
30/100
CVSS Score
7.5 HIGH
v3.1 (cve.org)
EPSS Score
0.32% LOW
0% probability 0.00%
KEV
Not listed
Ransomware
No reports
Public exploits
None found
Dark Web
Not detected

Timeline

14 May 2026, 14:54
Published
Vulnerability first disclosed
28 Jul 2026, 12:04
Last Modified
Vulnerability information updated

Description

Wasmtime is a runtime for WebAssembly. From 30.0.0 to 36.0.8, 43.0.2, and 44.0.1, Wasmtime's allocation logic for a WebAssembly table contained checked arithmetic which panicked on overflow. This overflow is possible to trigger, and thus panic, when a table with an extremely large size is allocated. This is possible with the WebAssembly memory64 proposal where tables can have sizes in the 64-bit range as opposed to the previous 32-bit range which would not overflow. The panic happens when attempting to create a very large table, such as when instantiating a WebAssembly module or component. This vulnerability is fixed in 36.0.8, 43.0.2, and 44.0.1.

CVSS Metrics

  • v4.0•MEDIUM•Score: 5.9CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:P/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
  • v4.0•MEDIUM•Score: 5.9CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:P/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
  • v3.1•HIGH•Score: 7.5CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

EPSS Trends

Current EPSS score: 0.32%• Percentile: 25%

Techniques & Countermeasures

  • CWE-770•Allocation of Resources Without Limits or Throttling

    The product allocates a reusable resource or group of resources on behalf of an actor without imposing any intended restrictions on the size or number of resources that can be allocated.

  • CWE-190•Integer Overflow or Wraparound

    The product performs a calculation that can produce an integer overflow or wraparound when the logic assumes that the resulting value will always be larger than the original value. This occurs when an integer value is incremented to a value that is too large to store in the associated representation. When this occurs, the value may become a very small or negative number.

Affected Systems

  • chainguard•wizer

    < 11.0.3-r12

  • chainguard•yara-x

    < 1.16.0-r1

  • wolfi•wizer

    < 11.0.3-r12

  • wolfi•yara-x

    < 1.16.0-r1

  • bytecodealliance•wasmtime

    ≥ 30.0.0, < 36.0.8 | ≥ 37.0.0, < 43.0.2 | 44.0.0

  • Crates.Io•wasmtime

    ≥ 44.0.0, < 44.0.1 | ≥ 30.0.0, < 36.0.8 | ≥ 37.0.0, < 43.0.2

  • debian•rust-wasmtime

    all | < 36.0.8+dfsg-1

References (12)