Red Hat Security Advisory 2021-0181-01 - The kernel packages contain the Linux kernel, the core of any Linux operating system.
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Ubuntu Security Notice 2337-1 - A flaw was discovered in the Linux kernel virtual machine's (kvm) validation of interrupt requests (irq). A guest OS user could exploit this flaw to cause a denial of service (host OS crash). Andy Lutomirski discovered a flaw in the authorization of netlink socket operations when a socket is passed to a process of more privilege. A local user could exploit this flaw to bypass access restrictions by having a privileged executable do something it was not intended to do. Various other issues were also addressed.
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Ubuntu Security Notice 2336-1 - A flaw was discovered in the Linux kernel virtual machine's (kvm) validation of interrupt requests (irq). A guest OS user could exploit this flaw to cause a denial of service (host OS crash). Andy Lutomirski discovered a flaw in the authorization of netlink socket operations when a socket is passed to a process of more privilege. A local user could exploit this flaw to bypass access restrictions by having a privileged executable do something it was not intended to do. Various other issues were also addressed.
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Ubuntu Security Notice 2334-1 - An flaw was discovered in the Linux kernel's audit subsystem when auditing certain syscalls. A local attacker could exploit this flaw to obtain potentially sensitive single-bit values from kernel memory or cause a denial of service (OOPS). An information leak was discovered in the rd_mcp backend of the iSCSI target subsystem in the Linux kernel. A local user could exploit this flaw to obtain sensitive information from ramdisk_mcp memory by leveraging access to a SCSI initiator. Various other issues were also addressed.
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Ubuntu Security Notice 2333-1 - A bug was discovered in the handling of pathname components when used with an autofs direct mount. A local user could exploit this flaw to cause a denial of service (system crash) via an open system call. Toralf reported an error in the Linux kernels syscall auditing on 32 bit x86 platforms. A local user could exploit this flaw to cause a denial of service (OOPS and system crash). An information leak was discovered in the control implementation of the Advanced Linux Sound Architecture (ALSA) subsystem in the Linux kernel. A local user could exploit this flaw to obtain sensitive information from kernel memory. Various other issues were also addressed.
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Ubuntu Security Notice 2332-1 - A bug was discovered in the handling of pathname components when used with an autofs direct mount. A local user could exploit this flaw to cause a denial of service (system crash) via an open system call. Toralf reported an error in the Linux kernels syscall auditing on 32 bit x86 platforms. A local user could exploit this flaw to cause a denial of service (OOPS and system crash). An information leak was discovered in the control implementation of the Advanced Linux Sound Architecture (ALSA) subsystem in the Linux kernel. A local user could exploit this flaw to obtain sensitive information from kernel memory. Various other issues were also addressed.
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