---
id: CVE-2021-46848
title: >-
  GNU Libtasn1 before 4.19.0 has an ETYPE_OK off-by-one array size check that
  affects asn1_encode_simple_der.
summary: >-
  GNU Libtasn1 before 4.19.0 has an ETYPE_OK off-by-one array size check that
  affects asn1_encode_simple_der.
severity: critical
cvss: 9.1
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H'
cwe:
  - CWE-193
  - CWE-193
vendor: gnu
product: libtasn1
affected:
  - libtasn1 < 4.19.0
  - fedora = 35
  - fedora = 36
  - fedora = 37
  - debian_linux = 10.0
patched:
  - libtasn1 4.19.0
published: '2022-10-24'
updated: '2026-10-14'
sourceUpdated: '2026-10-14T13:17:13.013'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2021-46848'
references:
  - url: 'https://bugs.gentoo.org/866237'
    label: cve@mitre.org
  - url: >-
      https://gitlab.com/gnutls/libtasn1/-/commit/44a700d2051a666235748970c2df047ff207aeb5
    label: cve@mitre.org
  - url: 'https://gitlab.com/gnutls/libtasn1/-/issues/32'
    label: cve@mitre.org
  - url: 'https://lists.debian.org/debian-lts-announce/2023/01/msg00003.html'
    label: cve@mitre.org
  - url: >-
      https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/AV4SHDJF2XLB4CUPTBPQQ6CLGZ5LKXPZ/
    label: cve@mitre.org
  - url: >-
      https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/ECM2ELTVRYV4BZ5L5GMIRQE27RFHPAQ6/
    label: cve@mitre.org
  - url: >-
      https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/OGO7XST4EIJGX4B2ITZCYSWM24534BSU/
    label: cve@mitre.org
  - url: >-
      https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/V5LWOGF7QRMNFRUCZY6TDYQJVFI6MOQ2/
    label: cve@mitre.org
  - url: 'https://security.netapp.com/advisory/ntap-20221118-0006/'
    label: cve@mitre.org
  - url: 'https://bugs.gentoo.org/866237'
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: >-
      https://gitlab.com/gnutls/libtasn1/-/commit/44a700d2051a666235748970c2df047ff207aeb5
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: 'https://gitlab.com/gnutls/libtasn1/-/issues/32'
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: 'https://lists.debian.org/debian-lts-announce/2023/01/msg00003.html'
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: >-
      https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/AV4SHDJF2XLB4CUPTBPQQ6CLGZ5LKXPZ/
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: >-
      https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/ECM2ELTVRYV4BZ5L5GMIRQE27RFHPAQ6/
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: >-
      https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/OGO7XST4EIJGX4B2ITZCYSWM24534BSU/
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: >-
      https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/V5LWOGF7QRMNFRUCZY6TDYQJVFI6MOQ2/
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: 'https://security.netapp.com/advisory/ntap-20221118-0006/'
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: 'https://cert-portal.siemens.com/productcert/html/ssa-398330.html'
    label: 0b142b55-0307-4c5a-b3c9-f314f3fb7c5e
tags:
  - nvd
epss: 0.02203
epssPercentile: 0.82079
ingestedAt: '2026-10-14T13:30:58.419Z'
---

## Overview

GNU Libtasn1 before 4.19.0 has an ETYPE_OK off-by-one array size check that affects asn1_encode_simple_der.

## Affected

- `libtasn1 < 4.19.0`
- `fedora = 35`
- `fedora = 36`
- `fedora = 37`
- `debian_linux = 10.0`

## Remediation

Upgrade past the affected range:

- `libtasn1 4.19.0`