CVE-2021-25907Public exploitNetwork attack vector

Memory corruption via panic-triggered double drop

Published Jan 22, 2021 · Updated Aug 3, 2024

Double free in the containers crate before 0.9.11 allows context-dependent attackers to corrupt memory by triggering a callback panic. The util::mutate and util::mutate2 functions use ptr::read to duplicate ownership temporarily, then drop the same object twice if the supplied function unwinds. Reachability depends on a consuming Rust application passing attacker-influenced processing into these helpers; the demonstrated consequence is allocator-detected process abortion, while the advisory also identifies memory corruption.

CVSS severity9.8
Critical
EPSS probability1.55%
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 containers crate before 0.9.11 allows context-dependent attackers to corrupt memory by triggering a callback panic. The util::mutate and util::mutate2 functions use ptr::read to duplicate ownership temporarily, then drop the same object twice if the supplied function unwinds. Reachability depends on a consuming Rust application passing attacker-influenced processing into these helpers; the demonstrated consequence is allocator-detected process abortion, while the advisory also identifies memory corruption.

The record

CVE
CVE-2021-25907
Published
Jan 22, 2021
Updated
Aug 3, 2024
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-415
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

9.8NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
7.5NIST NVDAV:N/AC:L/Au:N/C:P/I:P/A:P
9.8GitHub Advisory DatabaseCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/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 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-415Double Free

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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