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CVE-2022-47629

32
FAUCET Score

CVE-2022-47629 is a critical integer overflow vulnerability in the CRL signature parser of Libksba versions prior to 1.6.3, impacting Debian Linux and GnuPG products utilizing Libksba. This vulnerability carries a CVSS score of 9.8 (Critical), indicating it can be exploited remotely without user interaction to achieve full confidentiality, integrity, and availability compromise. While there is no evidence of active exploitation, public exploit code, or KEV listing, the vulnerability has garnered significant community discussion, with variant analysis available on GitHub.

Impacted Technologies

VendorProductVersion(s)CPE
< 1.6.3CPE matchmatch criteria
cpe:2.3:a:gnupg:libksba:*:*:*:*:*:*:*:*
10.0CPE matchmatch criteria
cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:*
11.0CPE matchmatch criteria
cpe:2.3:o:debian:debian_linux:11.0:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

9.8CRITICAL

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
Exploitability Score
3.9
Impact Score
5.9
CvssVersion
3.1

Exploit Intelligence

EPSS Score
1.55%
Probability of exploitation in next 30 days
EPSS Percentile
72.5%
Percentile rank of EPSS score among Peer Group
As of 2026-07-26
Model: v2026.06.15
This CVE's current EPSS score of 0.0155 is in the 60th percentile among its peer group of 36,833 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.3 Bluesky, 0.3 Mastodon, and 2.4 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.3 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (20)

microsoftpatch availablevia msrc
Product: 18507-16820Fixed in: 1.3.5-4
microsoftpatch availablevia msrc
Product: 18508-16823Fixed in: 1.6.3-1
microsoftpatch availablevia msrc
Product: cm1 libksba 1.3.5-4 on CBL Mariner 1.0Fixed in: 1.3.5-4
microsoftpatch availablevia msrc
Product: cbl2 libksba 1.6.3-1 on CBL Mariner 2.0Fixed in: 1.6.3-1
microsoftpatch availablevia msrc
Product: CBL Mariner 1.0 x64Fixed in: 1.3.5-4
microsoftpatch availablevia msrc
Product: CBL Mariner 1.0 ARMFixed in: 1.3.5-4
microsoftpatch availablevia msrc
Product: CBL Mariner 2.0 x64Fixed in: 1.6.3-1
microsoftpatch availablevia msrc
Product: CBL Mariner 2.0 ARMFixed in: 1.6.3-1
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 8.4 Extended Update SupportFixed in: libksba-0:1.3.5-9.el8_4
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 8.6 Extended Update SupportFixed in: libksba-0:1.3.5-9.el8_6
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 9Fixed in: libksba-0:1.5.1-6.el9_1
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 9.0 Extended Update SupportFixed in: libksba-0:1.5.1-6.el9_0
View patch
redhatpatch availablevia redhat_api
Product: Red Hat JBoss Enterprise Application Platform Expansion Pack
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Virtualization 4 for Red Hat Enterprise Linux 8Fixed in: redhat-virtualization-host-0:4.5.3-202302150956_8.6
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 7Fixed in: libksba-0:1.3.0-7.el7_9
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 8Fixed in: libksba-0:1.3.5-9.el8_7
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 8.1 Update Services for SAP SolutionsFixed in: libksba-0:1.3.5-9.el8_1
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 8.2 Advanced Update SupportFixed in: libksba-0:1.3.5-9.el8_2
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 8.2 Telecommunications Update ServiceFixed in: libksba-0:1.3.5-9.el8_2
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 8.2 Update Services for SAP SolutionsFixed in: libksba-0:1.3.5-9.el8_2
View patch

Vendor Advisories (3)

microsoft2023-Jan/CVE-2022-47629

CVE-2022-47629

Jan 10, 2023
microsoft2022-Dec/CVE-2022-47629Critical

Libksba before 1.6.3 is prone to an integer overflow vulnerability in the CRL signature parser.

Dec 13, 2022
redhatCVE-2022-47629Important

libksba: integer overflow to code execution

Oct 17, 2022

References

dev.gnupg.org / T6284
PatchThird Party Advisory
git.gnupg.org / cgi-bin/gitweb.cgi
lists.debian.org / debian-lts-announce/2022/12/msg00035.html
Mailing ListThird Party Advisory
security.gentoo.org / glsa/202212-07
Third Party Advisory
security.netapp.com / advisory/ntap-20230316-0011
debian.org / security/2022/dsa-5305
Third Party Advisory