CVE-2026-1858

CVE-2026-1858 involves wget2 accepting a server certificate with incorrect Key Usage (KU) or Extended Key Usage (EKU). The published description states that if an attacker compromises a certificate (and its private key) that was issued for a different purpose, that certificate may be reusable for...

CVE-2026-1858

wget2 accepts a server certificate with incorrect Key Usage KU or Extended Key Usage EKU. If the attackers compromise a certificate with the associated private key issued for a different purpose, they may be able to reuse it for TLS server authentication...

PT-2026-36003

Name of the Vulnerable Software and Affected Versions wget2 affected versions not specified Description An issue exists where the software accepts server certificates with incorrect Key Usage KU or Extended Key Usage EKU. This could allow an attacker who has compromised a certificate and its...

SUSE CVE-2026-31430

In the Linux kernel, the following vulnerability has been resolved: X.509: Fix out-of-bounds access when parsing extensions Leo reports an out-of-bounds access when parsing a certificate with empty Basic Constraints or Key Usage extension because the first byte of the extension is read before...

CVE-2026-31430

In the Linux kernel, the following vulnerability has been resolved: X.509: Fix out-of-bounds access when parsing extensions Leo reports an out-of-bounds access when parsing a certificate with empty Basic Constraints or Key Usage extension because the first byte of the extension is read before...

CVE-2026-31430 X.509: Fix out-of-bounds access when parsing extensions

In the Linux kernel, the following vulnerability has been resolved: X.509: Fix out-of-bounds access when parsing extensions Leo reports an out-of-bounds access when parsing a certificate with empty Basic Constraints or Key Usage extension because the first byte of the extension is read before...

CVE-2026-31430

In the Linux kernel, the following vulnerability has been resolved: X.509: Fix out-of-bounds access when parsing extensions Leo reports an out-of-bounds access when parsing a certificate with empty Basic Constraints or Key Usage extension because the first byte of the extension is read before...

CVE-2026-31430

CVE-2026-31430 affects the Linux kernel: X.509 extensions parsing could read the first byte of an extension before checking length, causing out-of-bounds access. The vulnerability can be triggered by an unprivileged user submitting a crafted certificate via the keyrings(7) API. A PoC exists. The ...

PT-2026-33747

Name of the Vulnerable Software and Affected Versions Linux kernel affected versions not specified Description An out-of-bounds access occurs when parsing X.509 certificates containing empty Basic Constraints or Key Usage extensions. This happens because the first byte of the extension is read...

A Novel Quantum Augmented Framework to Improve Microgrid Cybersecurity

Small modular nuclear reactors SMRs are redefining the energy generation landscape by enabling the deployment of modular, scalable, and pre-built power units that can be used to build distributed autonomous microgrids for critical infrastructure and burgeoning AI factories. Often, these microgrid...

SUSE CVE-2026-40097

Step CA is an online certificate authority for secure, automated certificate management for DevOps. From 0.24.0 to before 0.30.0-rc3, an attacker can trigger an index out-of-bounds panic in Step CA by sending a crafted attestation key AK certificate with an empty Extended Key Usage EKU extension...

CLSA-2026-1776159098 Fix CVE(s): CVE-2025-30258

SECURITY UPDATE: signature verification DoS via malicious subkey - debian/patches/CVE-2025-30258.patch: require signing usage when looking up public key for signature verification, filtering out subkeys without valid backsig. Include upstream regression fixes to preserve verification of signature...

CVE-2026-40097

A flaw was found in Step CA, an online certificate authority. A remote attacker can trigger a Denial of Service DoS by sending a specially crafted attestation key AK certificate with an empty Extended Key Usage EKU extension during Trusted Platform Module TPM device attestation. This causes an...

EUVD-2026-21506

Step CA affected by an index out of bounds panic in TPM attestation EKU validation...

GHSA-9QQ8-CGCV-QMC9 Step CA affected by an index out of bounds panic in TPM attestation EKU validation

Summary An attacker can trigger an index out-of-bounds panic in Step CA by sending a crafted attestation key AK certificate with an empty Extended Key Usage EKU extension during TPM device attestation. Details When processing a device-attest-01 ACME challenge using TPM attestation, Step CA...

Step CA affected by an index out of bounds panic in TPM attestation EKU validation

Summary An attacker can trigger an index out-of-bounds panic in Step CA by sending a crafted attestation key AK certificate with an empty Extended Key Usage EKU extension during TPM device attestation. Details When processing a device-attest-01 ACME challenge using TPM attestation, Step CA...

Improper Validation of Array Index

Overview Affected versions of this package are vulnerable to Improper Validation of Array Index of tcg-kp-AIKCertificate Extended Key Usage OID during TPM device attestation. An attacker can cause a panic and disrupt service availability by submitting a crafted attestation key certificate with an...

CVE-2026-40097

Step CA is an online certificate authority for secure, automated certificate management for DevOps. From 0.24.0 to before 0.30.0-rc3, an attacker can trigger an index out-of-bounds panic in Step CA by sending a crafted attestation key AK certificate with an empty Extended Key Usage EKU extension...

CVE-2026-40097 Step CA affected by an index out of bounds panic in TPM attestation EKU validation

Step CA is an online certificate authority for secure, automated certificate management for DevOps. From 0.24.0 to before 0.30.0-rc3, an attacker can trigger an index out-of-bounds panic in Step CA by sending a crafted attestation key AK certificate with an empty Extended Key Usage EKU extension...

CVE-2026-40097

Step CA is an online certificate authority for secure, automated certificate management for DevOps. From 0.24.0 to before 0.30.0-rc3, an attacker can trigger an index out-of-bounds panic in Step CA by sending a crafted attestation key AK certificate with an empty Extended Key Usage EKU extension...