CVE-2021-3444

The bpf verifier in the Linux kernel did not properly handle mod32 destination register truncation when the source register was known to be 0. A local attacker with the ability to load bpf programs could use this gain out-of-bounds reads in kernel memory leading to information disclosure kernel...

CVE-2021-3444 Linux kernel bpf verifier incorrect mod32 truncation

The bpf verifier in the Linux kernel did not properly handle mod32 destination register truncation when the source register was known to be 0. A local attacker with the ability to load bpf programs could use this gain out-of-bounds reads in kernel memory leading to information disclosure kernel...

AZL-6467 CVE-2021-3418 affecting package grub2 for versions less than 2.06~rc1-7

If certificates that signed grub are installed into db, grub can be booted directly. It will then boot any kernel without signature validation. The booted kernel will think it was booted in secureboot mode and will implement lockdown, yet it could have been tampered. This flaw is a reintroduction...

CVE-2021-3418

If certificates that signed grub are installed into db, grub can be booted directly. It will then boot any kernel without signature validation. The booted kernel will think it was booted in secureboot mode and will implement lockdown, yet it could have been tampered. This flaw is a reintroduction...

SYS.2.3.A18

Es SOLLTEN mit speziell gehaerteten Kernels z. B. grsecurity, PaX geeignete Schutzmassnahmen wie Speicherschutz, Dateisystemabsicherung und rollenbasierte Zugriffskontrolle umgesetzt werden, die eine Ausnutzung von Schwachstellen und die Ausbreitung im Betriebssystem verhindern...

SYS.1.3.A17

Es SOLLTEN speziell gehaertete Kernels z. B. grsecurity, PaX und geeignete Schutzmassnahmen wie Speicherschutz oder Dateisystemabsicherung umgesetzt werden, die eine Ausnutzung von Schwachstellen und die Ausbreitung im Betriebssystem verhindern. Copyright C 2021 Greenbone Networks GmbH Some text...

CVE-2021-3418

A flaw was found in grub. If certificates that signed grub are installed into db, grub can be booted directly. It will then boot any kernel without signature validation. The booted kernel will think it was booted in secureboot mode and will implement lockdown, yet it could have been tampered. Thi...

Virtuozzo ReadyKernel patch 123.0 for Virtuozzo Hybrid Server 7.0, 7.5, Virtuozzo Infrastructure Platform 3.0, and Virtuozzo Hybrid Infrastructure 3.5, 4.0

The cumulative Virtuozzo ReadyKernel patch was updated with stability fixes. The patch applies to all supported kernels of Virtuozzo Hybrid Server 7, Virtuozzo Infrastructure Platform, and Virtuozzo Hybrid Infrastructure. Vulnerability id: PSBM-126014 3.10.0-1127.18.2.vz7.163.46 The number of...

AZL-6522 CVE-2020-16120 affecting package kernel for versions less than 5.10.78.1-1

Overlayfs did not properly perform permission checking when copying up files in an overlayfs and could be exploited from within a user namespace, if, for example, unprivileged user namespaces were allowed. It was possible to have a file not readable by an unprivileged user to be copied to a...

ALPINE-CVE-2020-29570

An issue was discovered in Xen through 4.14.x. Recording of the per-vCPU control block mapping maintained by Xen and that of pointers into the control block is reversed. The consumer assumes, seeing the former initialized, that the latter are also ready for use. Malicious or buggy guest kernels c...

UBUNTU-CVE-2020-29570

An issue was discovered in Xen through 4.14.x. Recording of the per-vCPU control block mapping maintained by Xen and that of pointers into the control block is reversed. The consumer assumes, seeing the former initialized, that the latter are also ready for use. Malicious or buggy guest kernels c...

CVE-2020-29570

An issue was discovered in Xen through 4.14.x. Recording of the per-vCPU control block mapping maintained by Xen and that of pointers into the control block is reversed. The consumer assumes, seeing the former initialized, that the latter are also ready for use. Malicious or buggy guest kernels c...

CVE-2020-29570: Allocation of Resources Without Limits or Throttling

An issue was discovered in Xen through 4.14.x. Recording of the per-vCPU control block mapping maintained by Xen and that of pointers into the control block is reversed. The consumer assumes, seeing the former initialized, that the latter are also ready for use. Malicious or buggy guest kernels c...

glibc security, bug fix, and enhancement update

2.28-127.0.1 - add Ampere emag to tunable cpu list Patrick McGehearty - add optimized memset for emag - add an ASIMD variant of strlen for falkor - Orabug: 2700101. - Modify glibc-ora28849085.patch so it works with RHCK kernels. - Orabug: 28849085. - Make IOfunlockfile match funlockfile and...

Memory Corruption Vulnerability in Multiple Apple Products (CNVD-2020-65942)

Apple iOS is an operating system developed for mobile devices. apple tvOS is an operating system for Smart TVs. A memory corruption vulnerability exists in the kernel of Apple iOS before 13.6, iPadOS before 13.6, tvOS before 13.4.8, watchOS before 6.2.8, and macOS Catalina before 10.15.6. An...

x86 PV guest INVLPG-like flushes may leave stale TLB entries

ISSUE DESCRIPTION x86 PV guest kernels may use hypercalls with INVLPG-like behavior to invalidate TLB entries even after changes to non-leaf page tables. Such changes to non-leaf page tables will, however, also render stale possible TLB entries created by Xen's internal use of linear page tables ...

UBUNTU-CVE-2020-24490

Improper buffer restrictions in BlueZ may allow an unauthenticated user to potentially enable denial of service via adjacent access. This affects all Linux kernel versions that support BlueZ...

glibc security, bug fix, and enhancement update

2.17-317.0.1 - Merge RH el7 u8 patches with Oracle patches Review-exception: Simple merge - Adding Mike Fabians C.utf-8 patch C.utf-8 is a unicode-aware version of the C locale Orabug 29784239. Reviewed-by: Jose E. Marchesi - Remove glibc-ora28641867.patch as duplicate of glibc-rh1705899-4.patch ...

Denial Of Service (DoS)

xen is vulnerable to denial of service DoS. An issue was discovered in Xen through 4.14.x. x86 PV guest kernels can experience denial of service via SYSENTER. The SYSENTER instruction leaves various state sanitization activities to software. One of Xen's sanitization paths injects a GP fault, and...

Denial Of Service (DoS)

xen is vulnerable to denial of service DoS. There is a lack of preemption in evtchnreset / evtchndestroy. In particular, the FIFO event channel model allows guests to have a large number of event channels active at a time. Closing all of these when resetting all event channels or when cleaning up...