USN-7939-2: linux-azure-fips Ubuntu

Vulnerability summary

USN-7939-2 is a vulnerability in linux-azure-fips Ubuntu with no CVSS score yet.

Timeline

1. 16-12-2025
   PublishedVulnerability first disclosed.
2. 17-10-2026
   Last modifiedVulnerability information updated.

Description

linux-azure-fips vulnerabilities Jean-Claude Graf, Sandro Rüegge, Ali Hajiabadi, and Kaveh Razavi discovered that the Linux kernel contained insufficient branch predictor isolation between a guest and a userspace hypervisor for certain processors. This flaw is known as VMSCAPE. An attacker in a guest VM could possibly use this to expose sensitive information from the host OS. (CVE-2025-40300) Several security issues were discovered in the Linux kernel. An attacker could possibly use these to compromise the system. This update corrects flaws in the following subsystems: - Cryptographic API; - ACPI drivers; - HSI subsystem; - I3C subsystem; - InfiniBand drivers; - Media drivers; - Network drivers; - Pin controllers subsystem; - AFS file system; - F2FS file system; - SMB network file system; - Padata parallel execution mechanism; - Timer subsystem; - Tracing infrastructure; - Memory management; - Appletalk network protocol; - Networking core; - Netfilter; (CVE-2022-49026, CVE-2022-49390, CVE-2023-52854, CVE-2024-35867, CVE-2024-47691, CVE-2024-49935, CVE-2024-50061, CVE-2024-50067, CVE-2024-50095, CVE-2024-50196, CVE-2024-53090, CVE-2024-53218, CVE-2024-56664, CVE-2025-21727, CVE-2025-21855, CVE-2025-37838, CVE-2025-37958, CVE-2025-38352, CVE-2025-38666, CVE-2025-39964, CVE-2025-39993, CVE-2025-40018)

No weakness data has been published for this record.