ALT-PU-2021-2986-2

Package update kernel-image-std-debug in branch sisyphus

Version5.10.71-alt1

Published2026-02-04

Max severityHIGH

Severity:

Closed issues (4)

HIGH7.5

Уязвимость подсистемы виртуализации KVM ядра операционной системы Linux, связанная с недостатками разграничения доступа, позволяющая нарушителю повысить свои привилегии

Published: 2022-02-09Modified: 2024-09-16

CVSS 3.xHIGH 7.5

CVSS:3.x/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H

CVSS 2.0HIGH 7.6

CVSS:2.0/AV:N/AC:H/Au:N/C:C/I:C/A:C

References

CVE-2021-3653

HIGH8.8

Уязвимость ядра операционной системы Linux, связанная с недостатками разграничения доступа, позволяющая нарушителю повысить свои привилегии

Published: 2022-02-09Modified: 2025-02-11

CVSS 3.xHIGH 8.8

CVSS:3.x/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H

CVSS 2.0HIGH 7.1

CVSS:2.0/AV:N/AC:H/Au:S/C:C/I:C/A:C

References

CVE-2021-3656

HIGH8.8

A flaw was found in the KVM's AMD code for supporting SVM nested virtualization. The flaw occurs when processing the VMCB (virtual machine control block) provided by the L1 guest to spawn/handle a nested guest (L2). Due to improper validation of the "int_ctl" field, this issue could allow a malicious L1 to enable AVIC support (Advanced Virtual Interrupt Controller) for the L2 guest. As a result, the L2 guest would be allowed to read/write physical pages of the host, resulting in a crash of the entire system, leak of sensitive data or potential guest-to-host escape. This flaw affects Linux kernel versions prior to 5.14-rc7.

Published: 2021-09-29Modified: 2024-11-21

CVSS 2.0MEDIUM 6.1

CVSS:2.0/AV:L/AC:L/Au:N/C:P/I:P/A:C

CVSS 3.xHIGH 8.8

CVSS:3.x/CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H

References

HIGH8.8

A flaw was found in the KVM's AMD code for supporting SVM nested virtualization. The flaw occurs when processing the VMCB (virtual machine control block) provided by the L1 guest to spawn/handle a nested guest (L2). Due to improper validation of the "virt_ext" field, this issue could allow a malicious L1 to disable both VMLOAD/VMSAVE intercepts and VLS (Virtual VMLOAD/VMSAVE) for the L2 guest. As a result, the L2 guest would be allowed to read/write physical pages of the host, resulting in a crash of the entire system, leak of sensitive data or potential guest-to-host escape.

Published: 2022-03-04Modified: 2024-11-21

CVSS 2.0HIGH 7.2

CVSS:2.0/AV:L/AC:L/Au:N/C:C/I:C/A:C

CVSS 3.xHIGH 8.8

CVSS:3.x/CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H

References