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-2020-29562

CVE-2020-29562MEDIUM

n/a n/a — The iconv function in the GNU C Library (aka glibc or libc6) 2.30 to 2.32, when converting UCS4 text containing an irreversible character…

  AV  AC  PR  UI  S  C  I  A   CVSS    EPSS   %ile   KEV
   N   H   L   R  U  N  N  H    4.8   .0168   76.6     —

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

TIMELINE
  Dec 4   Reserved by mitre
  Dec 4   Published (CNA: mitre)
  Oct 14  EXPLOIT PUBLISHED — CVE-2020-29562. Public exploit reference added.

CWE-617 · CNA: mitre · CVSS v3.1 · 7 references · NVD status: Modified

Description

The iconv function in the GNU C Library (aka glibc or libc6) 2.30 to 2.32, when converting UCS4 text containing an irreversible character, fails an assertion in the code path and aborts the program, potentially resulting in a denial of service.

Lifecycle

Complete event history — 3 events, chronological
Date	Event	Detail
December 4, 2020	Reserved	Reserved by mitre
December 4, 2020	Published	Published (CNA: mitre)
October 14, 2026	EXPLOIT PUBLISHED	EXPLOIT PUBLISHED — CVE-2020-29562. 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-617

References (7)

https://cert-portal.siemens.com/productcert/html/ssa-398330.html
https://cert-portal.siemens.com/productcert/html/ssa-831302.html
https://lists.apache.org/thread.html/rf9fa47ab66495c78bb4120b0754dd9531ca2ff0430f6685ac9b07772%40%3Cdev.mina.apache.org%3E
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/TVCUNLQ3HXGS4VPUQKWTJGRAW2KTFGXS/
https://security.gentoo.org/glsa/202101-20 [Third Party Advisory]
https://security.netapp.com/advisory/ntap-20210122-0004/ [Third Party Advisory]
https://sourceware.org/bugzilla/show_bug.cgi?id=26923 [Exploit, Issue Tracking, Patch, Third Party Advisory]

Authoritative record: CVE-2020-29562 at cve.org

Weaknesses: CWE-617

About this page

This is a reference page, not a dated page of record. It assembles the complete lifecycle of CVE-2020-29562 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.