Reference page — cumulative record through Monday, October 19, 2026 UTC. Reference pages update as the archive grows; only dated daily editions are immutable pages of record.

CVE-2020-10029

CVE-2020-10029MEDIUM

n/a n/a — 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…

  AV  AC  PR  UI  S  C  I  A   CVSS    EPSS   %ile   KEV
   L   L   L   N  U  N  N  H    5.5   .0076   54.6     —

AFFECTED
  Product  Versions  Fixed
  n/a      n/a –     —

TIMELINE
  Mar 4   Reserved by mitre
  Mar 4   Published (CNA: mitre)
  Oct 14  ENRICHED — CVE-2020-10029. Received CVSS 5.5 and CPE data from NVD.
  Oct 14  EXPLOIT PUBLISHED — CVE-2020-10029. Public exploit reference added.

CWE-787 · CNA: mitre · CVSS v3.1 · 12 references · NVD status: Modified

Description

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.

Lifecycle

Complete event history — 4 events, chronological
Date	Event	Detail
March 4, 2020	Reserved	Reserved by mitre
March 4, 2020	Published	Published (CNA: mitre)
October 14, 2026	ENRICHED	ENRICHED — CVE-2020-10029. Received CVSS 5.5 and CPE data from NVD.
October 14, 2026	EXPLOIT PUBLISHED	EXPLOIT PUBLISHED — CVE-2020-10029. Public exploit reference added.

Affected

Affected products and packages — 1 row
Vendor	Product / Package	Ecosystem	Version introduced	Fixed
n/a	n/a	—	n/a	—

Weaknesses

CWE-787

References (12)

http://lists.opensuse.org/opensuse-security-announce/2020-03/msg00033.html [Mailing List, Third Party Advisory]
https://cert-portal.siemens.com/productcert/html/ssa-398330.html
https://cert-portal.siemens.com/productcert/html/ssa-831302.html
https://lists.debian.org/debian-lts-announce/2022/10/msg00021.html [Mailing List, Third Party Advisory]
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/23N76M3EDP2GIW4GOIQRYTKRE7PPBRB2/
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/JZTFUD5VH2GU3YOXA2KBQSBIDZRDWNZ3/
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/VU5JJGENOK7K4X5RYAA5PL647C6HD22E/
https://security.gentoo.org/glsa/202006-04 [Third Party Advisory]
https://security.netapp.com/advisory/ntap-20200327-0003/ [Third Party Advisory]
https://sourceware.org/bugzilla/show_bug.cgi?id=25487 [Exploit, Issue Tracking, Third Party Advisory]
https://sourceware.org/git/gitweb.cgi?p=glibc.git%3Ba=commit%3Bh=9333498794cde1d5cca518badf79533a24114b6f
https://usn.ubuntu.com/4416-1/ [Third Party Advisory]

Authoritative record: CVE-2020-10029 at cve.org

Weaknesses: CWE-787

About this page

This is a reference page, not a dated page of record. It assembles the complete lifecycle of CVE-2020-10029 from the CVE Program record, NVD enrichment, the CISA KEV catalog, EPSS, and OSV advisories. The box score's numbers (CVSS, EPSS, KEV status) are current as of Monday, October 19, 2026 UTC and are re-derived as the archive grows; only dated daily editions are immutable pages of record. The authoritative source for this identifier is cve.org.