CVE-2021-46848

CRITICALNVD 9.19.1—

9.1

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

CVSS v3: 9.1
EG Score: 9.1(medium)
EPSS: 70.5%
KEV: Not listed

Published

October 24, 2022

Last Modified

May 7, 2025

References (18)

cve@mitrehttps://bugs.gentoo.org/866237
cve@mitrehttps://gitlab.com/gnutls/libtasn1/-/commit/44a700d2051a666235748970c2df047ff207aeb5
cve@mitrehttps://gitlab.com/gnutls/libtasn1/-/issues/32
cve@mitrehttps://lists.debian.org/debian-lts-announce/2023/01/msg00003.html
cve@mitrehttps://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/AV4SHDJF2XLB4CUPTBPQQ6CLGZ5LKXPZ/
cve@mitrehttps://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/ECM2ELTVRYV4BZ5L5GMIRQE27RFHPAQ6/
cve@mitrehttps://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/OGO7XST4EIJGX4B2ITZCYSWM24534BSU/
cve@mitrehttps://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/V5LWOGF7QRMNFRUCZY6TDYQJVFI6MOQ2/
cve@mitrehttps://security.netapp.com/advisory/ntap-20221118-0006/
af854a3a-2127-422b-91ae-364da2661108https://bugs.gentoo.org/866237
af854a3a-2127-422b-91ae-364da2661108https://gitlab.com/gnutls/libtasn1/-/commit/44a700d2051a666235748970c2df047ff207aeb5
af854a3a-2127-422b-91ae-364da2661108https://gitlab.com/gnutls/libtasn1/-/issues/32
af854a3a-2127-422b-91ae-364da2661108https://lists.debian.org/debian-lts-announce/2023/01/msg00003.html
af854a3a-2127-422b-91ae-364da2661108https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/AV4SHDJF2XLB4CUPTBPQQ6CLGZ5LKXPZ/
af854a3a-2127-422b-91ae-364da2661108https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/ECM2ELTVRYV4BZ5L5GMIRQE27RFHPAQ6/

Patch Availability(6)

Vendor / Ecosystem	Fixed in / Patch	Released	Source
ubuntu	libtasn1-6 (4.7-3ubuntu0.16.04.3+esm3) @ xenial	2026-05-25	ubuntu
ubuntu	libtasn1-doc (4.7-3ubuntu0.16.04.3+esm4) @ xenial	2026-05-25	ubuntu
ubuntu	libtasn1-doc (4.20.0-2ubuntu0.25.04.1) @ plucky	2026-05-25	ubuntu
redhat	libtasn1-0:4.13-3.el8_6.1	2024-01-25	redhat
redhat	libtasn1-0:4.16.0-8.el9_1	2023-01-23	redhat
redhat	libtasn1-0:4.13-4.el8_7	2023-01-12	redhat

Patches are aggregated from vendor advisories (Red Hat, Microsoft, Cisco, GitHub) and package ecosystems (OSV, GHSA). Multiple rows for the same upstream release have been deduplicated.

Weakness Classification(2)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

All Vendor Advisories

(7)

Every vendor that published an advisory referencing this CVE — pulled from our cve_vendor_advisories aggregation. Click any row for the vendor's original advisory page.

Data Freshness Timeline

(refreshed 9× in last 7d / 9× in last 30d)

Every time one of our enrichment pipelines (NVD, MITRE cvelistV5, EPSS, CISA KEV, GHSA, OSV, vendor advisories) ran against this CVE. Most recent first.

2026-05-27 13:39 UTCepss_batch
2026-05-27 13:39 UTCepss_batch
2026-05-26 13:43 UTCepss_batch
2026-05-26 13:42 UTCepss_batch
2026-05-26 07:17 UTCepss_batch
2026-05-26 07:17 UTCepss_batch
2026-05-25 13:16 UTCEG score recompute
2026-05-25 13:16 UTCVendor advisory
2026-05-25 13:16 UTCGHSA enrichment

Frequently asked(5)

What is CVE-2021-46848?

CVE-2021-46848 is a critical vulnerability published on October 24, 2022. GNU Libtasn1 before 4.19.0 has an ETYPEOK off-by-one array size check that affects asn1encodesimpleder.

When was CVE-2021-46848 disclosed?

CVE-2021-46848 was first published in the National Vulnerability Database on October 24, 2022, with the most recent update on May 7, 2025. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.

Is CVE-2021-46848 actively exploited?

CVE-2021-46848 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 70.5% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.

What is the CVSS score of CVE-2021-46848?

CVE-2021-46848 has a CVSS v3 base score of 9.1 (NVD).

How do I remediate CVE-2021-46848?

Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2021-46848, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

Dependency Blast Radius

See which npm, PyPI, Go, and Maven packages are affected by CVE-2021-46848

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CVE-2021-46848

Published

Last Modified

References (18)

Patch Availability(6)

Weakness Classification(2)

All Vendor Advisories

Data Freshness Timeline

Frequently asked(5)

Dependency Blast Radius

Is Your Infrastructure Affected by CVE-2021-46848?

Same vendor

Same CWE

CVE-2021-46848

📅 Published

🔄 Last Modified

🔗 References (18)

Patch Availability(6)

Weakness Classification(2)

All Vendor Advisories

Data Freshness Timeline

❓ Frequently asked(5)

Dependency Blast Radius

Is Your Infrastructure Affected by CVE-2021-46848?

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References (18)

Frequently asked(5)

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