CVE-2020-8252
libuv: buffer overflow in realpath
Severity
ImportantRed Hat Product Security
CVSS 3.1
Review impact separately from score.
Published · September 15, 2020
Updated · June 28, 2026
Description
A flaw has been found in libuv. The realpath() implementation performs an incorrect calculation when allocating a buffer, leading to a potential buffer overflow. The highest threat from this vulnerability is to data confidentiality and integrity as well as system availability.
Statement
As shipped in Red Hat Software Collections (nodejs-10 & nodejs-12) as well as Red Hat Enterprise Linux 8 (nodejs-10 and nodejs-12), no incorrect use of the UV__PATH_MAX macro were found. Although the releases of libuv contained in these versions of nodejs are considered "Affected", it is considered not feasible to trigger the flaw.
NodeJS is included in Red Hat Quay as a dependency of Yarn which is only used while building Red Hat Quay, and not during runtime.
Red Hat Enterprise Linux 8 ships libuv-1.23.1, which is not vulnerable to this flaw.
CVSS score applicability
The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.
Mitigation
No mitigation is specified in collected source.
CVSS / CWE
CVSS 3.1 · 7.8CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
CWE-131 · Incorrect Calculation of Buffer Size