CVE-2020-10029

What it is

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.

At a glance

Exploitability

Can be exploited locally on the machine with a low-privilege account. High risk of service disruption.

Exploit odds

0.8% chance of exploitation in the next 30 days (EPSS).

Fix

No patch or advisory is linked yet. Look at mitigations or restrict exposure.

Timeline

1. 2020-03-04 15:15 UTC PublishedDisclosed publicly on CVE.org and NVD
2. 2026-10-14 09:17 UTC Last updatedMost recent change to the record

Why it ranks here

• Exploited in the wild: no, CISA does not list it.
• Exploit odds: 0.8% in the next 30 days (EPSS).
• Severity: 5.5 MEDIUM (CVSS).
• Fix: none linked yet, which raises it.

Details

Published

2020-03-04 15:15 UTC

Last modified

2026-10-14 09:17 UTC

Exploit probability

0.8% · EPSS, next 30 days

Weakness

CWE-787 · Out-of-bounds write

Record status

Modified

Affected

• Gnu Glibc < 2.32.0
• Fedoraproject Fedora 30
• Fedoraproject Fedora 31
• Fedoraproject Fedora 32
• Canonical Ubuntu Linux 16.04
• Canonical Ubuntu Linux 18.04
• Canonical Ubuntu Linux 19.10
• Opensuse Leap 15.1

Attack profile CVSS 3.1 · 5.5

Attack vector

Local

Complexity

Low

Privileges needed

Low

User interaction

None

Scope

Unchanged

Confidentiality

None

Integrity

None

Availability

High

Is it in your code?

Hand this to your coding agent. It searches your project for the affected products and checks versions. Nothing leaves your machine.

Read https://cve-list.com/agent/cve/CVE-2020-10029.md and follow it. Check whether this project is affected by CVE-2020-10029. Read only. Don't change anything and don't upload my code. Tell me yes, no or not sure, with the file as proof.

Copy as ticket · More options · Status badge