OESA-2026-2082 shim security update

Initial UEFI bootloader that handles chaining to a trusted full \ bootloader under secure boot environments. Security Fixes: Issue summary: When a delta CRL that contains a Delta CRL Indicator extension is processed a NULL pointer dereference might happen if the required CRL Number extension is...

rustls-webpki: Denial of service via panic on malformed CRL BIT STRING

Summary bitstringflags in src/der.rs panics with an index-out-of-bounds when given a BIT STRING whose content is exactly 0x00 one byte: zero padding bits, zero data bytes. This is reachable through the public API BorrowedCertRevocationList::fromder via the issuingDistributionPoint CRL extension...

GHSA-82J2-J2CH-GFR8 rustls-webpki: Denial of service via panic on malformed CRL BIT STRING

Summary bitstringflags in src/der.rs panics with an index-out-of-bounds when given a BIT STRING whose content is exactly 0x00 one byte: zero padding bits, zero data bytes. This is reachable through the public API BorrowedCertRevocationList::fromder via the issuingDistributionPoint CRL extension...

CVE-2026-28388 NULL Pointer Dereference When Processing a Delta CRL

Issue summary: When a delta CRL that contains a Delta CRL Indicator extension is processed a NULL pointer dereference might happen if the required CRL Number extension is missing. Impact summary: A NULL pointer dereference can trigger a crash which leads to a Denial of Service for an application...