CVE-2014-9748Network attack vector

Application deadlock via cross-thread mutex release

Published Feb 11, 2020 · Updated Aug 6, 2024

Race condition in libuv before 1.7.4 allows remote attackers to deadlock applications using the Windows XP or Server 2003 rwlock fallback. The uv_rwlock_t fallback can let one thread release a write mutex acquired by another, violating Windows critical-section ownership. Reachability requires a multithreaded application to exercise that legacy fallback during a race; the bounded outcome is an application hang.

CVSS severity8.1
High
EPSS probability2.53%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Race condition in libuv before 1.7.4 allows remote attackers to deadlock applications using the Windows XP or Server 2003 rwlock fallback. The uv_rwlock_t fallback can let one thread release a write mutex acquired by another, violating Windows critical-section ownership. Reachability requires a multithreaded application to exercise that legacy fallback during a race; the bounded outcome is an application hang.

The record

CVE
CVE-2014-9748
Published
Feb 11, 2020
Updated
Aug 6, 2024
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-362, T1499
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Feb 11, 2020CVE publishedPublication date reported by the CVE source.
  2. Aug 6, 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

8.1NIST NVDCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
6.8NIST NVDAV:N/AC:M/Au:N/C:P/I:P/A:P

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.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

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 exploitUnconfirmed

Weakness, pattern, technique

CWE-362Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')
T1499Endpoint Denial of Service

Public exploit references

No public exploit references are available in this record.

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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