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Vulnerabilities

Vulnerability · CVE-2021-46848

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

Published Oct 24, 2022 · catalog updated Oct 14, 2026 · GNU Libtasn1 before 4.19.0

Check if you run it

No confirmed exploitation is on record for CVE-2021-46848. EPSS is 2.26%. Act only if a listed version of GNU Libtasn1 before 4.19.0 is installed.

Gaps on this record

  • The stored product name is a package slug. The name on this page is taken from the title (GNU Libtasn1 before 4.19.0).
  • No vendor fix or required action is stored. Compare the linked advisory before you change production.
Severity
Critical9.1
Known exploitation
Not in CISA/VulnCheck KEV
EPSS
2.26%
Remediation
Advisory link
Affected products
cpe debian/debian linux · cpe fedoraproject/fedora · cpe gnu/libtasn1

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

Are you affected?

Enter the version you run. The result uses only the ranges stored on this record.

The check returns affected, not affected, or incomplete. It does not guess a version that is missing from the record.

  • cpe debian/debian linux10.0
  • cpe fedoraproject/fedora35
  • cpe fedoraproject/fedora36
  • cpe fedoraproject/fedora37
  • cpe gnu/libtasn1version unspecified

How to fix CVE-2021-46848

What to do

Three questions, each answered from this record only. Confirm the vendor advisory before you patch.

Should you patch?

No confirmed exploitation is on record for CVE-2021-46848. EPSS is 2.26%. Act only if a listed version of GNU Libtasn1 before 4.19.0 is installed.

Which versions are affected?

Compare what you have installed with debian/debian linux 10.0. Compare the installed version with the linked vendor advisory before you change production.

What should an analyst verify?

CWE-193. EPSS 2.26%. There is no CISA KEV listing. No Exploit-DB or Metasploit reference is linked. Use the source links for the original advisory.

Code

The project this record applies to. Exploit listings stay in References.

Timeline

Detection, updates, and resolution for this record.

  1. Oct 24, 2022 · NIST NVD

    Detected

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

  2. Oct 14, 2026 · NIST NVD

    Updated

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

Sources

  • CVE.orgVulnerability recordCVE-2021-46848

    Official CVE identifier

    cve.org
  • FIRST EPSSExploitation probabilityCVE-2021-46848

    30-day exploitation probability 2.3%

    first.org
  • NIST NVDVulnerability recordCVE-2021-46848

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

    nvd.nist.gov

References

Freshness

Last verified in this catalog Oct 16, 2026. Significant claims (KEV, EPSS, CVSS, affected ranges) come from the source rows above — open the original publisher for the authoritative advisory.