CVE-2020-14059: Squid-Cache Squid

Medium severity, CVSS 6.5. EPSS: 4.4% chance of exploitation in the next 30 days.

An issue was discovered in Squid 5.x before 5.0.3. Due to an Incorrect Synchronization, a Denial of Service can occur when processing objects in an SMP cache because of an Ipc::Mem::PageStack::pop ABA problem during access to the memory page/slot management list.

Affected products

• Squid-Cache Squid: from 5.0, before 5.0.3 (fixed in 5.0.3)

Published 2020-06-30. Last modified 2026-06-17.