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CVE-2022-21123

Status Candidate

Overview

Incomplete cleanup of multi-core shared buffers for some Intel(R) Processors may allow an authenticated user to potentially enable information disclosure via local access.

Related Files

Ubuntu Security Notice USN-5485-2
Posted Jul 4, 2022
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 5485-2 - It was discovered that some Intel processors did not completely perform cleanup actions on multi-core shared buffers. A local attacker could possibly use this to expose sensitive information. It was discovered that some Intel processors did not completely perform cleanup actions on microarchitectural fill buffers. A local attacker could possibly use this to expose sensitive information. It was discovered that some Intel processors did not properly perform cleanup during specific special register write operations. A local attacker could possibly use this to expose sensitive information.

tags | advisory, local
systems | linux, ubuntu
advisories | CVE-2022-21123, CVE-2022-21125, CVE-2022-21166
SHA-256 | 06d422dc8a4dfc17f18d1b50b015d7dc501edc86fbfb85076e004602dbe8d1be
Ubuntu Security Notice USN-5485-1
Posted Jun 20, 2022
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 5485-1 - It was discovered that some Intel processors did not completely perform cleanup actions on multi-core shared buffers. A local attacker could possibly use this to expose sensitive information. It was discovered that some Intel processors did not completely perform cleanup actions on microarchitectural fill buffers. A local attacker could possibly use this to expose sensitive information. It was discovered that some Intel processors did not properly perform cleanup during specific special register write operations. A local attacker could possibly use this to expose sensitive information.

tags | advisory, local
systems | linux, ubuntu
advisories | CVE-2022-21123, CVE-2022-21125, CVE-2022-21166
SHA-256 | 712ea0fa8cca54c56dcdee1163b6c9f9af4877ee2b821344703659e1956a2b24
Ubuntu Security Notice USN-5484-1
Posted Jun 20, 2022
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 5484-1 - It was discovered that the Linux kernel did not properly restrict access to the kernel debugger when booted in secure boot environments. A privileged attacker could use this to bypass UEFI Secure Boot restrictions. It was discovered that a race condition existed in the network scheduling subsystem of the Linux kernel, leading to a use-after-free vulnerability. A local attacker could use this to cause a denial of service or possibly execute arbitrary code.

tags | advisory, denial of service, arbitrary, kernel, local
systems | linux, ubuntu
advisories | CVE-2021-39713, CVE-2022-21123, CVE-2022-21125, CVE-2022-21166, CVE-2022-21499
SHA-256 | 6ec0ae0395c19c7e5a1cccd288c838331c898658993f20553714a1b880f284f3
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