The vulnerability of the OpenCapsule function in UEFI capsule file parsers and 7-Zip archivers allows a hacker to exploit the protected information.

The vulnerability of the OpenCapsule function in UEFI capsule file parsers and 7-Zip archivers is related to the use of uninitialized resources. Exploiting this vulnerability can allow a malicious actor to disclose protected information...

Use of Uninitialized Resource

Overview Affected versions of this package are vulnerable to Use of Uninitialized Resource in the OpenCapsule function. An attacker can access sensitive information from uninitialized heap memory by crafting a truncated UEFI capsule .scap file that, when extracted, causes portions of uninitialize...

CVE-2026-48101: Use of Uninitialized Resource

7-Zip is a file archiver with a high compression ratio. Versions 9.21 through 26.00 contain an An uninitialized memory disclosure vulnerability in the UEFI capsule .scap parser in 7-Zip. The OpenCapsule function allocates a heap buffer of attacker-declared CapsuleImageSize up to 1 GiB without...