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No exploitation reportedFix available

CVE-2021-46848

No exploitation reported by the sources we read.

  • Published2022-10-24
  • WeaknessCWE-193

Am I affected?

With a domain, we read the version its public headers and pages expose. A distribution build can carry the fix under an older number.

Description

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

Timeline

dates in UTC
  1. 2022-10-2414:15CVE publishedNVD

Versions per branch

NVD
Fedoraproject fedora
BranchAffectedFixed in
35.x= 35no fix published
36.x= 36no fix published
37.x= 37no fix published
Debian debian linux
BranchAffectedFixed in
10.0= 10.0no fix published
Gnu libtasn1
BranchAffectedFixed in
4.19< 4.19.04.19.0

as publishedRanges as NVD and OSV publish them; a distribution’s build can be fixed under an older number.

Distribution builds and vendor advisories

Packages from OSV.dev and products from the vendors' CSAF advisories.

version not verifiedVersions not verified: read as OSV.dev and the vendors publish them, not checked against each vendor's release list.

Packages

  • grub2openEuler:24.03-LTSall versions · fixed in 2.12-15.oe2403
  • grub2openEuler:22.03-LTS-SP3all versions · fixed in 2.06-46.oe2203sp3
  • grub2openEuler:22.03-LTS-SP1all versions · fixed in 2.06-42.oe2203sp1
  • libtasn1Wolfiall versions · fixed in 0
  • libtasn1TuxCare:RHEL:7all versions · fixed in 4.10-1.el7.tuxcare.els2and 2 other packages
  • libtasn1TuxCare:OracleLinux:7all versions · fixed in 4.10-1.el7.tuxcare.els2and 2 other packages
  • libtasn1TuxCare:CentOS:8.5all versions · fixed in 4.13-3.el8.tuxcare.els2and 2 other packages
  • libtasn1TuxCare:CentOS:8.4all versions · fixed in 4.13-3.el8.tuxcare.els2and 2 other packages

77 more package ranges on OSV.dev

Vendor advisories

  • CVE-2021-46848 Red Hat Product Security180 products fixed · 6 known affected

    libtasn1: Out-of-bound access in ETYPE_OK

    libtasn1 as a component of Red Hat Enterprise Linux 7 · libtasn1-devel as a component of Red Hat Enterprise Linux 7 · libtasn1-tools as a component of Red Hat Enterprise Linux 7 · +3 more

  • RHSA-2024:0427 Red Hat Product Security45 products fixed

    Red Hat Security Advisory: libtasn1 security update

  • ICSA-23-348-10 CISA5 known affected

    Siemens SIMATIC S7-1500

    SIMATIC S7-1500 CPU 1518-4 PN/DP MFP (6ES7518-4AX00-1AB0) · SIMATIC S7-1500 CPU 1518-4 PN/DP MFP (6ES7518-4AX00-1AC0) · SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP (6ES7518-4FX00-1AB0) · +2 more

  • SSA-398330 Siemens ProductCERT5 known affected

    SSA-398330: Vulnerabilities in the additional GNU/Linux subsystem of the SIMATIC S7-1500 CPU 1518(F)-4 PN/DP MFP >= V3.1.0 and < V3.1.5

    SIMATIC S7-1500 CPU 1518-4 PN/DP MFP (6ES7518-4AX00-1AB0) >= V3.1.0 < V3.1.5 · SIMATIC S7-1500 CPU 1518-4 PN/DP MFP (6ES7518-4AX00-1AC0) >= V3.1.0 < V3.1.5 · SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP (6ES7518-4FX00-1AB0) >= V3.1.0 < V3.1.5 · +2 more

  • RHSA-2023:0343 Red Hat Product Security45 products fixed

    Red Hat Security Advisory: libtasn1 security update

  • RHSA-2023:0116 Red Hat Product Security45 products fixed

    Red Hat Security Advisory: libtasn1 security update

Full record on NVD

Fix

  1. Vendor fix Red Hat Product Security RHSA-2024:0427 · 45 productsFor details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/11258
  2. Vendor fix CISA ICSA-23-348-10 · 5 productsUpdate to V3.1.5 or later version
  3. Vendor fix Siemens ProductCERT SSA-398330 · 1 productUpdate to V3.1.5 or later version
  4. Mitigation from the vendor CISA ICSA-23-348-10 · 5 productsOnly build and run applications from trusted sources.
  5. No fix planned, says the vendor Red Hat Product Security CVE-2021-46848 · 4 productsOut of support scope
  6. No fix planned, says the vendor Red Hat Product Security CVE-2021-46848 · 2 productsWill not fix

Advisories and patches

Detection

Nuclei template
none so far
ProjectDiscovery
Exploit-DB
no entry
Exploit-DB
Proof of concept
Metasploit modules
none listed
Metasploit Framework

Sources

Identifiers

Technical details

CVSS v3 Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H
Published
2022-10-24
Last Modified
2026-10-14
NVD status
Modified
GitHub Advisory
GHSA-6468-68pw-9chw

Frequently asked questions

What is 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.

Is CVE-2021-46848 actively exploited?

Active exploitation of CVE-2021-46848 has not been confirmed. Its EPSS score was 2.8% on 2026-11-08, the estimated probability of exploitation in the next 30 days.

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

CVE-2021-46848 has a CVSS v3 base score of 9.1 (CRITICAL severity), with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H.

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