CVE catalog

CVE-2026-34610

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 uin

[CVE catalog]

Severity: Medium · CVSS 5.9CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N
Published: Apr 2, 2026, 5:54:53 PM UTC
Source: [NVD] · [CVE record]
EPSS: 0.16% · Oct 25, 2026

A flaw was found in the leancrypto cryptographic library. A remote attacker can exploit an integer overflow vulnerability in the lc_x509_extract_name_segment() function when processing the Common Name (CN) field of an X.509 certificate. By crafting a specially designed certificate, an attacker can cause the system to incorrectly match their certificate's CN with a victim's, leading to identity impersonation. This can impact the integrity of PKCS#7 (Public-Key Cryptography Standards #7) verification, certificate chain matching, and code signing processes. Red Hat Product Security has determined that this vulnerability does not affect any currently supported Red Hat product. This assessment may evolve based on further analysis and discovery. For more information about this vulnerability and the products it affects, please see the linked references. The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.

Vulnerable and fixed packages

Distribution-reported package versions and fixes. These do not depend on matching against the OpenFactory package catalog.

Distribution	Package	Release	Version	Status
Cpe	leancrypto	Not reported	`1.7.1`	fixed
Opensuse	leancrypto	tumbleweed	`1.7.2-1.1`	fixed

Fixed-version evidence

Distribution	Package	Type	Release	Fixed version	Urgency	Origin	Bugs
Cpe	leancrypto	cpe	Not reported	`1.7.1`	Not reported	Not reported	Not reported
Opensuse	leancrypto	rpm	tumbleweed	`1.7.2-1.1`	Not reported	OPENSUSE-SU-2026:10563-1	Not reported

OpenFactory catalog packages

[openSUSE Tumbleweed]

[leancrypto-devel]Unknown
Source package: [leancrypto]
Details (1)
- 1.8.0-3.1 · x86_64 · tumbleweed
  Unknown · Fixed: 1.7.2-1.1
  Version impact unknown
  nvd · leancrypto · opensuse · tumbleweed
[leancrypto-devel-32bit]Unknown
Source package: [leancrypto]
Details (1)
- 1.8.0-3.1 · x86_64 · tumbleweed
  Unknown · Fixed: 1.7.2-1.1
  Version impact unknown
  nvd · leancrypto · opensuse · tumbleweed
[leancrypto-devel-static]Unknown
Source package: [leancrypto]
Details (1)
- 1.8.0-3.1 · x86_64 · tumbleweed
  Unknown · Fixed: 1.7.2-1.1
  Version impact unknown
  nvd · leancrypto · opensuse · tumbleweed
[leancrypto-tools]Unknown
Source package: [leancrypto]
Details (1)
- 1.8.0-3.1 · x86_64 · tumbleweed
  Unknown · Fixed: 1.7.2-1.1
  Version impact unknown
  nvd · leancrypto · opensuse · tumbleweed
[libleancrypto1]Unknown
Source package: [leancrypto]
Details (1)
- 1.8.0-3.1 · x86_64 · tumbleweed
  Unknown · Fixed: 1.7.2-1.1
  Version impact unknown
  nvd · leancrypto · opensuse · tumbleweed
[libleancrypto1-32bit]Unknown
Source package: [leancrypto]
Details (1)
- 1.8.0-3.1 · x86_64 · tumbleweed
  Unknown · Fixed: 1.7.2-1.1
  Version impact unknown
  nvd · leancrypto · opensuse · tumbleweed
[libleancrypto-fips1]Unknown
Source package: [leancrypto]
Details (1)
- 1.8.0-3.1 · x86_64 · tumbleweed
  Unknown · Fixed: 1.7.2-1.1
  Version impact unknown
  nvd · leancrypto · opensuse · tumbleweed
[libleancrypto-fips1-32bit]Unknown
Source package: [leancrypto]
Details (1)
- 1.8.0-3.1 · x86_64 · tumbleweed
  Unknown · Fixed: 1.7.2-1.1
  Version impact unknown
  nvd · leancrypto · opensuse · tumbleweed

Observed: Oct 23, 2026, 10:32:49 PM UTC

References

[FIRST EPSS] · [National Vulnerability Database (NVD)] · [OSV Package Vulnerability Database] · [Red Hat security advisories and VEX] · [SUSE security advisories and VEX]