Upstream information

CVE-2026-34610 at MITRE

Description

The leancrypto library is a cryptographic library that exclusively contains only PQC-resistant cryptographic algorithms. Prior to version 1.7.1, lc_x509_extract_name_segment() casts size_t vlen to uint8_t when storing the Common Name (CN) length. An attacker who crafts a certificate with CN = victim's CN + 256 bytes padding gets cn_size = (uint8_t)(256 + N) = N, where N is the victim's CN length. The first N bytes of the attacker's CN are the victim's identity. After parsing, the attacker's certificate has an identical CN to the victim's - enabling identity impersonation in PKCS#7 verification, certificate chain matching, and code signing. This issue has been patched in version 1.7.1.

SUSE information

Overall state of this security issue: Pending

This issue is currently rated as having moderate severity.

CVSS v3 Scores
CVSS detail CNA (GitHub) SUSE
Base Score 5.9 5.9
Vector CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N
Attack Vector Network Network
Attack Complexity High High
Privileges Required None None
User Interaction None None
Scope Unchanged Unchanged
Confidentiality Impact None None
Integrity Impact High High
Availability Impact None None
CVSSv3 Version 3.1 3.1
SUSE Bugzilla entry: 1261382 [IN_PROGRESS]

SUSE Security Advisories:

List of released packages

Product(s) Fixed package version(s) References
Image SLES-Azure-3P
Image SLES-Azure-Basic
Image SLES-Azure-Standard
Image SLES-BYOS-Azure
Image SLES-BYOS-EC2
Image SLES-BYOS-GCE
Image SLES-EC2
Image SLES-GCE
Image SLES-GCE-3P
Image SLES-Hardened-BYOS-Azure
Image SLES-Hardened-BYOS-EC2
Image SLES-Hardened-BYOS-GCE
Image SLES-SAP-Azure
Image SLES-SAP-Azure-3P
Image SLES-SAP-BYOS-Azure
Image SLES-SAP-BYOS-EC2
Image SLES-SAP-BYOS-GCE
Image SLES-SAP-EC2
Image SLES-SAP-GCE
Image SLES-SAP-GCE-3P
Image SLES-SAPCAL-Azure
Image SLES-SAPCAL-EC2
Image SLES-SAPCAL-GCE
  • libleancrypto1 >= 1.7.2-160000.1.1
SUSE Linux Enterprise Server 16.0
SUSE Linux Enterprise Server for SAP applications 16.0
  • leancrypto-devel >= 1.7.2-160000.1.1
  • leancrypto-devel-static >= 1.7.2-160000.1.1
  • leancrypto-tools >= 1.7.2-160000.1.1
  • libleancrypto-fips1 >= 1.7.2-160000.1.1
  • libleancrypto1 >= 1.7.2-160000.1.1
 Patchnames:
SUSE-SLES-16.0-789
SUSE Linux Micro 6.2
  • libleancrypto1 >= 1.7.2-160000.1.1
 Patchnames:
SUSE-SL-Micro-6.2-789
openSUSE Leap 16.0
  • leancrypto-devel >= 1.7.2-160000.1.1
  • leancrypto-devel-static >= 1.7.2-160000.1.1
  • leancrypto-kmp-64kb >= 1.7.2_k6.12.0_160000.32-160000.1.1
  • leancrypto-kmp-default >= 1.7.2_k6.12.0_160000.32-160000.1.1
  • leancrypto-tools >= 1.7.2-160000.1.1
  • libleancrypto-fips1 >= 1.7.2-160000.1.1
  • libleancrypto1 >= 1.7.2-160000.1.1
 Patchnames:
openSUSE-Leap-16.0-789
openSUSE Tumbleweed
  • leancrypto-devel >= 1.7.2-1.1
  • leancrypto-devel-32bit >= 1.7.2-1.1
  • leancrypto-devel-static >= 1.7.2-1.1
  • leancrypto-tools >= 1.7.2-1.1
  • libleancrypto-fips1 >= 1.7.2-1.1
  • libleancrypto-fips1-32bit >= 1.7.2-1.1
  • libleancrypto1 >= 1.7.2-1.1
  • libleancrypto1-32bit >= 1.7.2-1.1
 Patchnames:
openSUSE-Tumbleweed-2026-10563

List of packages in QA

Product(s) Package(s)
SUSE Linux Enterprise Server 16.0
  • leancrypto-devel >= 1.7.2-160000.1.1
  • leancrypto-devel-static >= 1.7.2-160000.1.1
  • leancrypto-tools >= 1.7.2-160000.1.1
  • libleancrypto-fips1 >= 1.7.2-160000.1.1
  • libleancrypto1 >= 1.7.2-160000.1.1

First public cloud image revisions this CVE is fixed in:

Status of this issue by product and package

Please note that this evaluation state might be work in progress, incomplete or outdated. Also information for service packs in the LTSS phase is only included for issues meeting the LTSS criteria. If in doubt, feel free to contact us for clarification. The updates are grouped by state of their lifecycle. SUSE product lifecycles are documented on the lifecycle page.

Product(s) Source package State
Products under general support and receiving all security fixes.
SUSE Linux Enterprise Server 16.0 leancrypto In progress
SUSE Linux Enterprise Server 16.1 leancrypto Affected
SUSE Linux Enterprise Server for SAP applications 16.0 leancrypto Released
SUSE Linux Enterprise Server for SAP applications 16.1 leancrypto Affected
SUSE Linux Micro 6.2 leancrypto Released
openSUSE Leap 16.0 leancrypto Affected

SUSE Timeline for this CVE

CVE page created: Thu Apr 2 22:05:51 2026
CVE page last modified: Tue Jun 2 11:33:51 2026