CVE-2026-6450 CRL critical extension bypass in ParseCRL_Extensions

A CRL critical extension bypass exists in ParseCRLExtensions where critical extensions are not properly enforced, allowing a crafted CRL with an unhandled critical extension to be accepted. This only affects builds with CRL support enabled and where a crafted CRL had a trusted signature when pars...

OESA-2026-2622 edk2 security update

EDK II is a modern, feature-rich, cross-platform firmware development environment for the UEFI and PI specifications. Security Fixes: Issue summary: An uncommon configuration of clients performing DANE TLSA-based server authentication, when paired with uncommon server DANE TLSA records, may resul...

OESA-2026-2620 edk2 security update

EDK II is a modern, feature-rich, cross-platform firmware development environment for the UEFI and PI specifications. Security Fixes: Issue summary: An uncommon configuration of clients performing DANE TLSA-based server authentication, when paired with uncommon server DANE TLSA records, may resul...

OESA-2026-2619 edk2 security update

EDK II is a modern, feature-rich, cross-platform firmware development environment for the UEFI and PI specifications. Security Fixes: Issue summary: An uncommon configuration of clients performing DANE TLSA-based server authentication, when paired with uncommon server DANE TLSA records, may resul...

CVE-2026-6899 Improper Check for Certificate Revocation in S2OPC

Check for certificate revocation only considers the first matching CRL and ignores other valid CRLs of the same CA in the CycloneCrypto cryptographic wrapper of S2OPC library. It might allow connection between an OPC UA client and server using a revoked certificate...

PT-2026-47721

Check for certificate revocation only considers the first matching CRL and ignores other valid CRLs of the same CA in the CycloneCrypto cryptographic wrapper of S2OPC library. It might allow connection between an OPC UA client and server using a revoked certificate...

EulerOS 2.0 SP11 : openssl (EulerOS-SA-2026-2258)

According to the versions of the openssl packages installed, the EulerOS installation on the remote host is affected by the following vulnerabilities : Issue summary: When a delta CRL that contains a Delta CRL Indicator extension is processed a NULL pointer dereference might happen if the require...

EulerOS 2.0 SP11 : openssl (EulerOS-SA-2026-2221)

According to the versions of the openssl packages installed, the EulerOS installation on the remote host is affected by the following vulnerabilities : Issue summary: When a delta CRL that contains a Delta CRL Indicator extension is processed a NULL pointer dereference might happen if the require...

Astra Linux - уязвимость в libksba

A vulnerability was discovered in the Libksba library due to an integer overflow within the CRL parser. This vulnerability can be exploited remotely to execute code on the target system by passing specially crafted data to the application, such as a malicious S/MIME attachment...

Astra Linux - уязвимость в openssl

There is a type confusion vulnerability related to X.400 address processing within an X.509 GENERALNAME. X.400 addresses are parsed as ASN1STRING, but the public structure definition for GENERALNAME incorrectly specifies the type of the x400Address field as ASN1TYPE. This field is subsequently...

CLSA-2026-1778787445 Fix CVE(s): CVE-2026-28387, CVE-2026-28388, CVE-2026-28389

SECURITY UPDATE: Use-after-free / heap corruption in danematch of the X.509 verifier where the cached DANE-matched certificate was freed via OPENSSLfree instead of X509free, bypassing the X509 reference counting and freeing certificate fields that may still be referenced by other holders. An...

curl: rustls backend silently ignores CURLOPT_CRLFILE when native CA store is active

Hi all, When the rustls backend is configured to use the OS native CA store --ca-native / CURLSSLOPTNATIVECA, any CRL file supplied via --crlfile / CURLOPTCRLFILE is silently ignored. The option is accepted — CURLEOK from curleasysetopt, exit 0 from the command line — and revoked certificates pas...

CLSA-2026-1778583971 Fix CVE(s): CVE-2026-28387, CVE-2026-28388

SECURITY UPDATE: A use-after-free / heap corruption in danematch of the X.509 verifier where the cached DANE-matched certificate was freed via OPENSSLfree instead of X509free, bypassing the X509 reference counting and freeing certificate fields that may still be referenced by other holders. An...

CLSA-2026-1778071148 openssl: Fix of 4 CVEs

CVE-2026-28387: fix use of OPENSSLfree instead of X509free on dane-mcert in danematch X509 reference-count bypass / UAF - CVE-2026-28388: fix NULL deref in checkdeltabase when a delta CRL carries the Delta CRL Indicator extension but lacks a CRL Number - CVE-2026-28389: fix NULL deref in...

CLSA-2026-1778020035 openssl: Fix of CVE-2026-28388

CVE-2026-28388: fix NULL pointer dereference in checkdeltabase when delta CRL lacks CRL Number extension...

CLSA-2026-1777999127 Fix CVE(s): CVE-2026-28387, CVE-2026-28388, CVE-2026-28389, CVE-2026-28390

SECURITY UPDATE: fix UAF/double-free in DANE client by using X509free for dane-mcert - debian/patches/CVE-2026-28387.patch: fix UAF/double-free in DANE client by using X509free for dane-mcert - CVE-2026-28387 SECURITY UPDATE: NULL check delta-crlnumber before ASN1INTEGERcmp in checkdeltabase -...

Astra Linux – Vulnerability in libksba

Before version 1.6.3, Libksba was vulnerable to an integer overflow vulnerability in the CRL signature parser...

Astra Linux – Vulnerability in StrongSwan

Before version 5.9.8, StrongSwan allowed remote attackers to cause a denial of service in the revocation plugin by sending a crafted end-entity and intermediate CA certificate that contained a CRL/OCSP URL pointing to a server under the attacker’s control that did not respond properly. In some...

OPENSUSE-SU-2026:20658-1 Security update for himmelblau

This update for himmelblau fixes the following issues: Update to version 2.3.9+git0.a9fd29b. Security issues fixed: - CVE-2026-34397: Fixed naming collision that can lead to local privilege escalation bsc1261324. Other updates and bugfixes: - update aws-lc-sys to 0.39.0 for security fixes - updat...

Medium: openssl

Issue Overview: NULL Pointer Dereference When Processing a Delta CRL NOTE: https://openssl-library.org/news/secadv/20260407.txt CVE-2026-28388 Possible NULL dereference when processing CMS KeyAgreeRecipientInfo CVE-2026-28389 Possible NULL dereference when processing CMS KeyTransportRecipientInfo...