CVE-2020-19860
ldns: heap overread vulnerability via zone file
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Severity
ModerateRed Hat Product Security
CVSS 3.1
Review impact separately from score.
Published · January 21, 2022
Updated · November 22, 2025
Description
A heap out-of-bounds read flaw was found in ldns, specifically within the ldns_rr_new_frm_str_internal function. This flaw allows an attacker to leak information on the heap by creating a malicious zone file.
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 · 6.5CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N
CWE-125 · Out-of-bounds Read