CVE-2020-10029: Canonical Ubuntu Linux

Medium severity, CVSS 5.5. EPSS: 0.8% chance of exploitation in the next 30 days.

The GNU C Library (aka glibc or libc6) before 2.32 could overflow an on-stack buffer during range reduction if an input to an 80-bit long double function contains a non-canonical bit pattern, a seen when passing a 0x5d414141414141410000 value to sinl on x86 targets. This is related to sysdeps/ieee754/ldbl-96/e_rem_pio2l.c.

Affected products

• Canonical Ubuntu Linux: version 16.04 only; version 18.04 only; version 19.10 only
• Debian Debian Linux: version 10.0 only
• Fedoraproject Fedora: version 30 only; version 31 only; version 32 only
• GNU Glibc: before 2.32.0 (fixed in 2.32.0)
• Netapp Active Iq Unified Manager: affected versions not specified
• Netapp Cloud Backup: affected versions not specified
• Netapp h410c Firmware: affected versions not specified
• Netapp Hci Management Node: affected versions not specified
• Netapp Solidfire: affected versions not specified
• Netapp Steelstore Cloud Integrated Storage: affected versions not specified
• Opensuse Leap: version 15.1 only

Published 2020-03-04. Last modified 2026-06-17.