CVE-2014-9748

Severity: high (CVSS 8.1 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 2.5% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2020-02-11 · updated 2026-06-17
Weakness: CWE-362

Description

The uv_rwlock_t fallback implementation for Windows XP and Server 2003 in libuv before 1.7.4 does not properly prevent threads from releasing the locks of other threads, which allows attackers to cause a denial of service (deadlock) or possibly have unspecified other impact by leveraging a race condition.

Affected products

libuv: before 1.7.4 — fixed in 1.7.4
Node.js: from 0.10.0 before 0.10.46; from 0.12.0 before 0.12.15 — fixed in 0.10.46, 0.12.15

How to fix

Upgrade to a fixed version: libuv 1.7.4; Node.js 0.10.46, 0.12.15. Check the vendor advisory for mitigations.

References

https://github.com/libuv/libuv/issues/515
https://github.com/libuv/libuv/pull/516
https://github.com/nodejs/node/pull/2723
https://groups.google.com/forum/#%21msg/libuv/KyNnGEXR0OA/NWb605ev2LUJ
https://groups.google.com/forum/#%21topic/libuv/WO2cl9zasN8
https://github.com/libuv/libuv/issues/515
https://github.com/libuv/libuv/pull/516
https://github.com/nodejs/node/pull/2723
https://groups.google.com/forum/#%21msg/libuv/KyNnGEXR0OA/NWb605ev2LUJ
https://groups.google.com/forum/#%21topic/libuv/WO2cl9zasN8

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