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 and . 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. For the oldstable distribution (bullseye), these problems have been fixed in version 5.10.179-3. We recommend that you upgrade your linux packages. For the detailed security status of linux please refer to its security tracker page at: https://security-tracker.debian.org/tracker/linux
Several vulnerabilities have been discovered in the Linux kernel that may lead to a privilege escalation, denial of service or information leaks.
A use-after-free flaw in the netfilter subsystem caused by incorrect error path handling may result in denial of service or privilege escalation.
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.
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
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.
For the oldstable distribution (bullseye), these problems have been fixed in version 5.10.179-3.
We recommend that you upgrade your linux packages.
For the detailed security status of linux please refer to its security tracker page at: https://security-tracker.debian.org/tracker/linux
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