CVE-2020-22219
flac: Remote Code Execution (RCE) via the bitwriter_grow_ function, by supplying crafted input to the encoder
Severity
ImportantRed Hat Product Security
CVSS 3.1
Review impact separately from score.
Published · August 22, 2023
Updated · November 22, 2025
Description
A flaw was found in the libeconf library. This issue occurs due to a buffer overflow vulnerability in the bitwriter_grow_ function in FLAC that allows remote attackers to run arbitrary code via crafted input to the encoder.
Statement
This CVE marked as important as it can allow authenticated remote users to execute arbitrary code, or allow remote users to cause a denial of service.
flac-1.3.0 in Red Hat Enterprise Linux 7 is not impacted. As it doesn't have the safe_realloc function, so not leaks memory.
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
Mitigation for this issue is either not available or the currently available options don't meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base or stability.
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-120 · Buffer Copy without Checking Size of Input ('Classic Buffer Overflow')