CVE-2021-25908Public exploitNetwork attack vector

Process crash via panic-triggered double drop

Published Jan 22, 2021 · Updated Aug 3, 2024

Double free in the fil-ocl Rust crate allows attackers to crash a consuming process by triggering a panic during EventList conversion. From uses ptr::read to move array elements, invokes the caller-defined Into conversion, and defers mem::forget until the loop completes. If that conversion panics, unwinding drops both the moved value and the still-live source array, double-freeing the element and terminating the process.

CVSS severity7.5
High
EPSS probability1.33%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Double free in the fil-ocl Rust crate allows attackers to crash a consuming process by triggering a panic during EventList conversion. From uses ptr::read to move array elements, invokes the caller-defined Into conversion, and defers mem::forget until the loop completes. If that conversion panics, unwinding drops both the moved value and the still-live source array, double-freeing the element and terminating the process.

The record

CVE
CVE-2021-25908
Published
Jan 22, 2021
Updated
Aug 3, 2024
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-415, T1499
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jan 22, 2021CVE publishedPublication date reported by the CVE source.
  2. Aug 3, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Affected buildAffected product and version details are unavailable.

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

5.0NIST NVDAV:N/AC:L/Au:N/C:N/I:N/A:P
7.5NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-415Double Free
T1499Endpoint Denial of Service

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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