CVE-2026-54875 Non-Constant-Time SM2 Scalar Multiplication on ARM64 and RISC-V

Issue summary: A non-constant-time optimized implementation of scalar point multiplication is used for SM2 private key operations on ARM64 and RISC-V platforms. Impact summary: An attacker able to measure the time taken by, or to observe the cache-line access pattern of SM2 signing or decryption ...

CVE-2026-54875

Issue summary: A non-constant-time optimized implementation of scalar point multiplication is used for SM2 private key operations on ARM64 and RISC-V platforms. Impact summary: An attacker able to measure the time taken by, or to observe the cache-line access pattern of SM2 signing or decryption ...

CVE-2026-54875

OpenSSL versions 4.0, 3.6, 3.5, and 3.4 are vulnerable to a timing and cache side-channel on ARM64 and RISC-V platforms. The root cause is a non-constant-time optimized implementation of scalar point multiplication for SM2 private key operations, where execution time and cache-access patterns dep...

CVE-2026-54872 Timing Side-Channel in Scalar Multiplication for Non-NIST EC Curves

Issue summary: The generic elliptic-curve scalar multiplication used for ECDSA and SM2 signature operations with curves that do not have a dedicated implementation leaks information about the secret nonce through timing. Impact summary: An attacker able to measure signing times may learn...

CVE-2026-54872

Issue summary: The generic elliptic-curve scalar multiplication used for ECDSA and SM2 signature operations with curves that do not have a dedicated implementation leaks information about the secret nonce through timing. Impact summary: An attacker able to measure signing times may learn...

CVE-2026-54872 Timing Side-Channel in Scalar Multiplication for Non-NIST EC Curves

Issue summary: The generic elliptic-curve scalar multiplication used for ECDSA and SM2 signature operations with curves that do not have a dedicated implementation leaks information about the secret nonce through timing. Impact summary: An attacker able to measure signing times may learn...

EUVD-2026-89004

Issue summary: The generic elliptic-curve scalar multiplication used for ECDSA and SM2 signature operations with curves that do not have a dedicated implementation leaks information about the secret nonce through timing. Impact summary: An attacker able to measure signing times may learn...

CVE-2026-54872 Timing Side-Channel in Scalar Multiplication for Non-NIST EC Curves

Issue summary: The generic elliptic-curve scalar multiplication used for ECDSA and SM2 signature operations with curves that do not have a dedicated implementation leaks information about the secret nonce through timing. Impact summary: An attacker able to measure signing times may learn...

CVE-2026-54872

A timing side-channel vulnerability exists in OpenSSL 's generic elliptic-curve scalar multiplication used for ECDSA and SM2 signature operations. The flaw occurs because the generic implementation uses non-constant-time BIGNUM operations to pad secret scalars for curves lacking a dedicated const...

Moderate: Red Hat Security Advisory: Red Hat JBoss Core Services Apache HTTP Server 2.4.62 SP6 security update

Red Hat JBoss Core Services Apache HTTP Server 2.4.62 Service Pack 6 is now available. Red Hat Product Security has rated this update as having a security impact of Moderate. A Common Vulnerability Scoring System CVSS base score, which gives a detailed severity rating, is available for each...

httpd: mod_auth_digest: timing attack allows a bypass of digest authentication

A flaw was found in the modauthdigest module of httpd. A remote unauthenticated attacker can bypass digest authentication by measuring timing discrepancies of requests. This issue leads to unauthorized access to resources protected by digest authentication...

Moderate: Red Hat Security Advisory: Red Hat JBoss Core Services Apache HTTP Server 2.4.62 SP6 security update

Red Hat JBoss Core Services Apache HTTP Server 2.4.62 Service Pack 6 is now available. Red Hat Product Security has rated this update as having a security impact of Moderate. A Common Vulnerability Scoring System CVSS base score, which gives a detailed severity rating, is available for each...

httpd: mod_auth_digest: timing attack allows a bypass of digest authentication

A flaw was found in the modauthdigest module of httpd. A remote unauthenticated attacker can bypass digest authentication by measuring timing discrepancies of requests. This issue leads to unauthorized access to resources protected by digest authentication...

RHEL 8 : Red Hat JBoss Core Services Apache HTTP Server 2.4.62 SP6 (RHSA-2026:73076)

The remote Redhat Enterprise Linux 8 host has packages installed that are affected by multiple vulnerabilities as referenced in the RHSA-2026:73076 advisory. Red Hat JBoss Core Services is a set of supplementary software for Red Hat JBoss middleware products. This software, such as Apache HTTP...

UBUNTU-CVE-2026-77696

Issue summary: SM2 signature generation uses non-constant-time arithmetic on secret values, forming a timing side-channel. Impact summary: An attacker able to measure SM2 signing times may learn information about the per-signature secret nonce, which over many signatures can, via a lattice / Hidd...

PT-2026-102652

Name of the Vulnerable Software and Affected Versions OpenSSL versions 4.0 through 4.0.2 OpenSSL versions 3.6 through 3.6.4 OpenSSL versions 3.5 through 3.5.8 OpenSSL versions 3.4 through 3.4.7 Description On ARM64 and RISC-V platforms, the SM2 curve utilizes a scalar multiplication implementatio...

PT-2026-102657

Name of the Vulnerable Software and Affected Versions The product name cannot be determined. affected versions not specified Description SM2 signature generation uses non-constant-time arithmetic on secret values, creating a timing side-channel. The process computes the signature value using...

PT-2026-102981

Name of the Vulnerable Software and Affected Versions oauthlib affected versions not specified Description A timing side-channel exists in the PKCE implementation of the Authorization Code Grant flow. The functions code challenge method plain and code challenge method s256 in the file...

CVE-2026-54872: Observable Timing Discrepancy

Issue summary: The generic elliptic-curve scalar multiplication used for ECDSA and SM2 signature operations with curves that do not have a dedicated implementation leaks information about the secret nonce through timing. Impact summary: An attacker able to measure signing times may learn...

CVE-2026-54872: Observable Timing Discrepancy

Issue summary: The generic elliptic-curve scalar multiplication used for ECDSA and SM2 signature operations with curves that do not have a dedicated implementation leaks information about the secret nonce through timing. Impact summary: An attacker able to measure signing times may learn...