Security Bulletin: A vulnerability in OpenSSL affects IBM Rational ClearQuest (CVE-2025-66199)

Summary An OpenSSL vulnerability was disclosed by the OpenSSL Project. OpenSSL is used by IBM Rational ClearQuest. IBM Rational ClearQuest has addressed the applicable CVE. Vulnerability Details CVEID:CVE-2025-66199 DESCRIPTION: Issue summary: A TLS 1.3 connection using certificate compression ca...

Security Bulletin: A vulnerability in OpenSSL affects IBM DevOps Code ClearCase

Summary OpenSSL vulnerabilities were disclosed by the OpenSSL Project. OpenSSL is used by IBM DevOps Code ClearCase. CVE-2025-66199 Vulnerability Details CVEID:CVE-2025-66199 DESCRIPTION: Issue summary: A TLS 1.3 connection using certificate compression can be forced to allocate a large buffer...

Security Bulletin: This Power System update is being released to address CVE-2025-66199

Summary The OpenSSL package is used by the Virtualization Management Interface in PowerVM to support network communication with the Hardware Management Console. This bulletin provides a remediation for the impacted vulnerability, CVE-2025-66199, by upgrading PowerVM and thus addressing the exposu...

JLSEC-2026-260 Issue summary: A TLS 1.3 connection using certificate compression can be forced to allocate a large...

Issue summary: A TLS 1.3 connection using certificate compression can be forced to allocate a large buffer before decompression without checking against the configured certificate size limit. Impact summary: An attacker can cause per-connection memory allocations of up to approximately 22 MiB and...

ROS-20260420-73-0016

A vulnerability in the maxcertlist parameter of certificate compression in TLS 1.3 of the OpenSSL library is related to uncontrolled memory allocation. Exploitation of the vulnerability could allow an attacker acting remotely to cause a denial of service...

openssl: OpenSSL: Denial of Service due to excessive memory allocation in TLS 1.3 certificate compression

A flaw was found in OpenSSL. A remote attacker can exploit this vulnerability by sending a specially crafted CompressedCertificate message during the TLS 1.3 handshake. This can cause excessive per-connection memory allocations, leading to resource exhaustion and a Denial of Service DoS for...

K000160551: OpenSSL vulnerability CVE-2025-66199

Security Advisory Description Issue summary: A TLS 1.3 connection using certificate compression can be forced to allocate a large buffer before decompression without checking against the configured certificate size limit. Impact summary: An attacker can cause per-connection memory allocations of ...

AlmaLinux 9 : openssl (ALSA-2026:1473)

The remote AlmaLinux 9 host has packages installed that are affected by multiple vulnerabilities as referenced in the ALSA-2026:1473 advisory. openssl: OpenSSL: Arbitrary code execution or denial of service through crafted PKCS12 file CVE-2025-11187 openssl: OpenSSL: Remote code execution or Deni...

SUSE CVE-2025-66199

Issue summary: A TLS 1.3 connection using certificate compression can be forced to allocate a large buffer before decompression without checking against the configured certificate size limit. Impact summary: An attacker can cause per-connection memory allocations of up to approximately 22 MiB and...

Ubuntu 22.04 LTS / 24.04 LTS / 25.10 : OpenSSL vulnerabilities (USN-7980-1)

The remote Ubuntu 22.04 LTS / 24.04 LTS / 25.10 host has packages installed that are affected by multiple vulnerabilities as referenced in the USN-7980-1 advisory. Stanislav Fort, Petr imeek, and Hamza discovered that OpenSSL incorrectly validated PBMAC1 parameters when doing PKCS12 MAC...

openssl: OpenSSL: Denial of Service due to excessive memory allocation in TLS 1.3 certificate compression

A flaw was found in OpenSSL. A remote attacker can exploit this vulnerability by sending a specially crafted CompressedCertificate message during the TLS 1.3 handshake. This can cause excessive per-connection memory allocations, leading to resource exhaustion and a Denial of Service DoS for...

Memory Allocation with Excessive Size Value

Overview Affected versions of this package are vulnerable to Memory Allocation with Excessive Size Value. up to 22 MiB when allocating buffers for CompressedCertificate messages on a TLS 1.3 connection with certificate compression. An attacker can cause service degradation or resource exhaustion...

ALPINE-CVE-2025-66199

Issue summary: A TLS 1.3 connection using certificate compression can be forced to allocate a large buffer before decompression without checking against the configured certificate size limit. Impact summary: An attacker can cause per-connection memory allocations of up to approximately 22 MiB and...

AZL-75284 CVE-2025-66199 affecting package openssl for versions less than 3.3.5-3

Issue summary: A TLS 1.3 connection using certificate compression can be forced to allocate a large buffer before decompression without checking against the configured certificate size limit. Impact summary: An attacker can cause per-connection memory allocations of up to approximately 22 MiB and...

CVE-2025-66199

Issue summary: A TLS 1.3 connection using certificate compression can be forced to allocate a large buffer before decompression without checking against the configured certificate size limit. Impact summary: An attacker can cause per-connection memory allocations of up to approximately 22 MiB and...

CVE-2025-66199

OpenSSL versions 3.6, 3.5, 3.4, and 3.3 are vulnerable to a Denial of Service (DoS) condition during TLS 1.3 connections using certificate compression. The root cause is an unbounded heap buffer allocation where the peer-supplied uncompressed certificate length from a CompressedCertificate messag...

CVE-2025-66199 TLS 1.3 CompressedCertificate excessive memory allocation

Issue summary: A TLS 1.3 connection using certificate compression can be forced to allocate a large buffer before decompression without checking against the configured certificate size limit. Impact summary: An attacker can cause per-connection memory allocations of up to approximately 22 MiB and...

CVE-2025-66199 TLS 1.3 CompressedCertificate excessive memory allocation

Issue summary: A TLS 1.3 connection using certificate compression can be forced to allocate a large buffer before decompression without checking against the configured certificate size limit. Impact summary: An attacker can cause per-connection memory allocations of up to approximately 22 MiB and...

CVE-2025-66199

Issue summary: A TLS 1.3 connection using certificate compression can be forced to allocate a large buffer before decompression without checking against the configured certificate size limit. Impact summary: An attacker can cause per-connection memory allocations of up to approximately 22 MiB and...

CVE-2025-66199

Issue summary: A TLS 1.3 connection using certificate compression can be forced to allocate a large buffer before decompression without checking against the configured certificate size limit. Impact summary: An attacker can cause per-connection memory allocations of up to approximately 22 MiB and...