It was discovered that a race condition existed in the GFS2 file system in the Linux kernel. A local attacker could possibly use this to cause a denial of service (system crash). It was discovered that a use-after-free error existed in the block layer subsystem of the Linux kernel when certain failure conditions occurred. A local attacker could possibly use this to cause a denial of service (system crash) or possibly execute arbitrary code. Various other issues were also addressed.
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Red Hat Security Advisory 2019-1699-01 - The redhat-virtualization-host packages provide the Red Hat Virtualization Host. These packages include redhat-release-virtualization-host, ovirt-node, and rhev-hypervisor. Red Hat Virtualization Hosts are installed using a special build of Red Hat Enterprise Linux with only the packages required to host virtual machines. RHVH features a Cockpit user interface for monitoring the host's resources and performing administrative tasks. Issues addressed include a denial of service vulnerability.
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Red Hat Security Advisory 2019-1602-01 - The kernel-alt packages provide the Linux kernel version 4.x. Issues addressed include a denial of service vulnerability.
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Red Hat Security Advisory 2019-1594-01 - The redhat-virtualization-host packages provide the Red Hat Virtualization Host. These packages include redhat-release-virtualization-host, ovirt-node, and rhev-hypervisor. Red Hat Virtualization Hosts are installed using a special build of Red Hat Enterprise Linux with only the packages required to host virtual machines. RHVH features a Cockpit user interface for monitoring the host's resources and performing administrative tasks. Issues addressed include a denial of service vulnerability.
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Jonathan Looney discovered that an integer overflow existed in the Linux kernel when handling TCP Selective Acknowledgments (SACKs). A remote attacker could use this to cause a denial of service (system crash). Jonathan Looney discovered that the TCP retransmission queue implementation in the Linux kernel could be fragmented when handling certain TCP Selective Acknowledgment (SACK) sequences. A remote attacker could use this to cause a denial of service.
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Debian Linux Security Advisory 4465-1 - Several vulnerabilities have been discovered in the Linux kernel that may lead to a privilege escalation, denial of service or information leaks.
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Netflix has identified several TCP networking vulnerabilities in FreeBSD and Linux kernels. The vulnerabilities specifically relate to the minimum segment size (MSS) and TCP Selective Acknowledgement (SACK) capabilities. The most serious, dubbed _"SACK Panic_," allows a remotely-triggered kernel panic on recent Linux kernels. There are patches that address most of these vulnerabilities. If patches can not be applied, certain mitigations will be effective.
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Ubuntu Security Notice 4017-1 - Jonathan Looney discovered that the TCP retransmission queue implementation in the Linux kernel could be fragmented when handling certain TCP Selective Acknowledgment sequences. A remote attacker could use this to cause a denial of service. Jonathan Looney discovered that an integer overflow existed in the Linux kernel when handling TCP Selective Acknowledgments. A remote attacker could use this to cause a denial of service. Various other issues were also addressed.
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Ubuntu Security Notice 4017-2 - USN-4017-1 fixed vulnerabilities in the Linux kernel for Ubuntu. This update provides the corresponding updates for the Linux kernel for Ubuntu 16.04 ESM and Ubuntu 14.04 ESM. Jonathan Looney discovered that the TCP retransmission queue implementation in the Linux kernel could be fragmented when handling certain TCP Selective Acknowledgment sequences. A remote attacker could use this to cause a denial of service. Various other issues were also addressed.
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Red Hat Security Advisory 2019-1487-01 - The kernel-rt packages provide the Real Time Linux Kernel, which enables fine-tuning for systems with extremely high determinism requirements. Issues addressed include a denial of service vulnerability.
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Red Hat Security Advisory 2019-1480-01 - The kernel-rt packages provide the Real Time Linux Kernel, which enables fine-tuning for systems with extremely high determinism requirements. Issues addressed include denial of service and null pointer vulnerabilities.
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Red Hat Security Advisory 2019-1486-01 - The kernel-rt packages provide the Real Time Linux Kernel, which enables fine-tuning for systems with extremely high determinism requirements. Issues addressed include a denial of service vulnerability.
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Red Hat Security Advisory 2019-1484-01 - The kernel packages contain the Linux kernel, the core of any Linux operating system. Issues addressed include a denial of service vulnerability.
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Red Hat Security Advisory 2019-1490-01 - The kernel packages contain the Linux kernel, the core of any Linux operating system. Issues addressed include a denial of service vulnerability.
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Red Hat Security Advisory 2019-1485-01 - The kernel packages contain the Linux kernel, the core of any Linux operating system. Issues addressed include a denial of service vulnerability.
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Red Hat Security Advisory 2019-1489-01 - The kernel packages contain the Linux kernel, the core of any Linux operating system. Issues addressed include a denial of service vulnerability.
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Red Hat Security Advisory 2019-1483-01 - The kernel packages contain the Linux kernel, the core of any Linux operating system. Issues addressed include a denial of service vulnerability.
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Red Hat Security Advisory 2019-1482-01 - The kernel packages contain the Linux kernel, the core of any Linux operating system. Issues addressed include a denial of service vulnerability.
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Red Hat Security Advisory 2019-1481-01 - The kernel packages contain the Linux kernel, the core of any Linux operating system. Issues addressed include a denial of service vulnerability.
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Red Hat Security Advisory 2019-1488-01 - The kernel packages contain the Linux kernel, the core of any Linux operating system. Issues addressed include a denial of service vulnerability.
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Red Hat Security Advisory 2019-1479-01 - The kernel packages contain the Linux kernel, the core of any Linux operating system. Issues addressed include denial of service and null pointer vulnerabilities.
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