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- CVEs with nessus.description==Security Fix(es) :
- Modern operating systems implement virtualization of
physical memory to efficiently use available system
resources and provide inter-domain protection through
access control and isolation. The L1TF issue was found
in the way the x86 microprocessor designs have
implemented speculative execution of instructions (a
commonly used performance optimisation) in combination
with handling of page-faults caused by terminated
virtual to physical address resolving process. As a
result, an unprivileged attacker could use this flaw to
read privileged memory of the kernel or other processes
and/or cross guest/host boundaries to read host memory
by conducting targeted cache side-channel attacks.
(CVE-2018-3620, CVE-2018-3646)
- An industry-wide issue was found in the way many modern
microprocessor designs have implemented speculative
execution of instructions past bounds check. The flaw
relies on the presence of a precisely-defined
instruction sequence in the privileged code and the fact
that memory writes occur to an address which depends on
the untrusted value. Such writes cause an update into
the microprocessor's data cache even for speculatively
executed instructions that never actually commit
(retire). As a result, an unprivileged attacker could
use this flaw to influence speculative execution and/or
read privileged memory by conducting targeted cache
side- channel attacks. (CVE-2018-3693)
- kernel: kvm: vmx: host GDT limit corruption
(CVE-2018-10901)
- kernel: Use-after-free in snd_pcm_info function in ALSA
subsystem potentially leads to privilege escalation
(CVE-2017-0861)
- kernel: Use-after-free in snd_seq_ioctl_create_port()
(CVE-2017-15265)
- kernel: race condition in snd_seq_write() may lead to
UAF or OOB-access (CVE-2018-7566)
- kernel: Race condition in sound system can lead to
denial of service (CVE-2018-1000004)
Bug Fix(es) :
- The Least recently used (LRU) operations are batched by
caching pages in per-cpu page vectors to prevent
contention of the heavily used lru_lock spinlock. The
page vectors can hold even the compound pages.
Previously, the page vectors were cleared only if they
were full. Subsequently, the amount of memory held in
page vectors, which is not reclaimable, was sometimes
too high. Consequently the page reclamation started the
Out of Memory (OOM) killing processes. With this update,
the underlying source code has been fixed to clear LRU
page vectors each time when a compound page is added to
them. As a result, OOM killing processes due to high
amounts of memory held in page vectors no longer occur.
Max CVSS | 0 |
Min CVSS | 0 |
Total Count | 2 |
| ID | CVSS | Summary | Last (major) update | Published |
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