httpd: mod_md: unrestricted OCSP response leads to resource exhaustion

A flaw was found in the modmd module of httpd. When processing OCSP Online Certificate Status Protocol responses from a malicious or compromised OCSP responder, the module fails to enforce proper size limits on the incoming data. This issue leads to memory exhaustion and a denial of service...

Moderate: Red Hat Security Advisory: mod_md security update

An update for modmd is now available for Red Hat Enterprise Linux 9.4 Update Services for SAP Solutions. 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...

Moderate: Red Hat Security Advisory: mod_md security update

An update for modmd is now available for Red Hat Enterprise Linux 9.2 Update Services for SAP Solutions. 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...

CVE-2026-58062

A flaw was found in Bouncy Castle for Java. A remote attacker could exploit this by presenting a stapled Online Certificate Status Protocol OCSP response that is not properly bound to the certificate being checked. This vulnerability allows for a certificate validation bypass, potentially leading...

Security update for bouncycastle

This update for bouncycastle fixes the following issues: CVE-2026-8763: Name Constraints bypass via trailing dot in rfc822Name and URI bsc1272700. CVE-2026-12185: BKS/UBER keystore allocates from untrusted lengths before integrity check bsc1272701. CVE-2026-12802: CMS AuthEnvelopedData fails to...

Missing Release of Memory after Effective Lifetime

Overview Affected versions of this package are vulnerable to Missing Release of Memory after Effective Lifetime through the checkcertocspresp function in crypto/x509/x509vfy.c. An attacker can exhaust memory in a TLS client by supplying a stapled OCSP BasicResponse with no single-response entries...

CVE-2026-54876

Issue summary: A malicious TLS server can cause a memory leak in a TLS client that has enabled OCSP response checking by sending an OCSP response that contains no single response entries. Impact summary: An attacker can leak an attacker-tunable amount of memory per TLS handshake in a victim clien...

CVE-2026-54876 Client-Side Memory Leak in OCSP Response Checking

Issue summary: A malicious TLS server can cause a memory leak in a TLS client that has enabled OCSP response checking by sending an OCSP response that contains no single response entries. Impact summary: An attacker can leak an attacker-tunable amount of memory per TLS handshake in a victim clien...

CVE-2026-54876

CVE-2026-54876 describes a memory leak in TLS clients that enable OCSP response checking when interacting with a malicious TLS server. Specifically, if the server returns an OCSP response containing an empty BasicOCSPResponse (empty SEQUENCE OF SingleResponse), the OCSP_basicRESP structure alloca...

CVE-2026-54876

Issue summary: A malicious TLS server can cause a memory leak in a TLS client that has enabled OCSP response checking by sending an OCSP response that contains no single response entries. Impact summary: An attacker can leak an attacker-tunable amount of memory per TLS handshake in a victim clien...

OpenSSL 4.0.0 < 4.0.2 Vulnerability

The version of OpenSSL installed on the remote host is prior to 4.0.2. It is, therefore, affected by a vulnerability as referenced in the 4.0.2 advisory. - Issue summary: A malicious TLS server can cause a memory leak in a TLS client that has enabled OCSP response checking by sending an OCSP...

Linux Distros Unpatched Vulnerability : CVE-2026-54876

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available. - Issue summary: A malicious TLS server can cause a memory leak in a TLS client that has enabled OCSP response checking by sending an OCSP response that contains ...

PT-2026-63544

Name of the Vulnerable Software and Affected Versions Netty versions prior to 4.1.136.Final Netty versions prior to 4.2.16.Final Description An issue exists in the OcspServerCertificateValidator where out-of-date OCSP Online Certificate Status Protocol responses are flagged but not stopped from...

CVE-2026-56820

Netty is a network application framework for development of protocol servers and clients. In versions 4.2.0.Final through 4.2.15.Final and prior to 4.1.135.Final, OcspClient does not validate that the CertificateID in an OCSP response matches the requested CertificateID, which can lead to replay...

CVE-2026-56820 Netty: Missing CertificateID Validation in OCSP Response Allows Replay Attacks

Netty is a network application framework for development of protocol servers and clients. In versions 4.2.0.Final through 4.2.15.Final and prior to 4.1.135.Final, OcspClient does not validate that the CertificateID in an OCSP response matches the requested CertificateID, which can lead to replay...

ALSA-2026:30844 Moderate: mod_md security update

This module manages common properties of domains for one or more virtual hosts. Specifically it can use the ACME protocol to automate certificate provisioning. Certificates will be configured for managed domains and their virtual hosts automatically, including at renewal. Security Fixes: httpd:...

SUSE SLES12 Security Update : openssl-1_0_0 (SUSE-SU-2026:2396-1)

The remote SUSE Linux SLES12 host has packages installed that are affected by multiple vulnerabilities as referenced in the SUSE-SU-2026:2396-1 advisory. This update for openssl-100 fixes the following issues - CVE-2026-7383: Possible Heap Buffer Overflow in ASN.1 Multibyte String Conversion...

SUSE-SU-2026:2399-1 Security update for openssl-1_0_0

This update for openssl-100 fixes the following issues - CVE-2026-7383: Possible Heap Buffer Overflow in ASN.1 Multibyte String Conversion bsc1266340. - CVE-2026-9076: Out-of-Bounds Read in CMS Password-Based Decryption bsc1266341. - CVE-2026-28388: NULL Pointer Dereference When Processing a Delt...

CVE-2026-42765

Issue summary: When a partial-chain certificate verification is enabled together with OCSP response checking for the whole chain, a NULL dereference will happen if the verified chain does not have a self-signed trusted anchor, crashing the process. Impact summary: A NULL pointer dereference can...

SUSE-SU-2026:2103-1 Security update for apache2

This update for apache2 fixes the following issues - CVE-2026-23918: http2: double free and possible RCE on early reset bsc1263957. - CVE-2026-24072: modrewrite elevation of privileges via apexpr bsc1263935. - CVE-2026-28780: heap buffer overflow in modproxyajp via ajpmsgcheckheader bsc1264163. -...