vulnerability
Red Hat: CVE-2018-18281: Important: kernel-alt security and bug fix update (Multiple Advisories)
| Severity | CVSS | Published | Added | Modified |
|---|---|---|---|---|
| 5 | (AV:L/AC:L/Au:N/C:P/I:P/A:P) | Oct 30, 2018 | Apr 24, 2019 | Mar 3, 2021 |
Severity
5
CVSS
(AV:L/AC:L/Au:N/C:P/I:P/A:P)
Published
Oct 30, 2018
Added
Apr 24, 2019
Modified
Mar 3, 2021
Description
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.
Solutions
redhat-upgrade-kernelredhat-upgrade-kernel-rt
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