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Package linux
CVE ID: CVE-2023-3390 CVE-2023-3610 CVE-2023-20593
Several vulnerabilities have been discovered in the Linux kernel that
may lead to a privilege escalation, denial of service or information
leaks.
CVE-2023-3390
A use-after-free flaw in the netfilter subsystem caused by incorrect
error path handling may result in denial of service or privilege
escalation.
CVE-2023-3610
A use-after-free flaw in the netfilter subsystem caused by incorrect
refcount handling on the table and chain destroy path may result in
denial of service or privilege escalation.
CVE-2023-20593
Tavis Ormandy discovered that under specific microarchitectural
circumstances, a vector register in AMD "Zen 2" CPUs may not be
written to 0 correctly. This flaw allows an attacker to leak
sensitive information across concurrent processes, hyper threads
and virtualized guests.
For details please refer to
<https://lock.cmpxchg8b.com/zenbleed.html> and
<https://github.com/google/security-research/security/advisories/GHSA-v6wh-rxpg-cmm8>.
This issue can also be mitigated by a microcode update through the
amd64-microcode package or a system firmware (BIOS/UEFI) update.
However, the initial microcode release by AMD only provides
updates for second generation EPYC CPUs. Various Ryzen CPUs are
also affected, but no updates are available yet.
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