ALT Linux Team

Package kernel-image-un-def update in sisyphus on 2018-11-02

ALT-PU-2018-2586-1

Package kernel-image-un-def updated to version 4.18.16-alt1 for branch sisyphus in task 216046.

Closed vulnerabilities

Published: 2018-10-18

BDU:2019-02783

Уязвимость в реализации системного вызова mremap() ядра операционной системы Linux, позволяющая нарушителю получить доступ к физической странице

Severity: HIGH (7.8) Vector: AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
References:
Published: 2018-10-30
Modified: 2024-11-21

CVE-2018-18281

Since Linux kernel version 3.2, the mremap() syscall performs TLB flushes after dropping pagetable locks. If a syscall such as ftruncate() removes entries from the pagetables of a task that is in the middle of mremap(), a stale TLB entry can remain for a short time that permits access to a physical page after it has been released back to the page allocator and reused. This is fixed in the following kernel versions: 4.9.135, 4.14.78, 4.18.16, 4.19.

Severity: HIGH (7.8) Vector: CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
References:
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Version: 2.1.0
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