Ubuntu Security Notice 1938-1 – Vasily Kulikov discovered a flaw in the Linux Kernel’s perf tool that allows for privilege escalation. A local could exploit this flaw to run commands as root when using the perf tool. A flaw was discovered in the Xen subsystem of the Linux kernel when it provides a guest OS read-only access to disks that support TRIM or SCSI UNMAP. A privileged user in the guest OS could exploit this flaw to destroy data on the disk. Various other issues were also addressed…. Ubuntu Security Notice 1938-1 – Vasily Kulikov discovered a flaw in the Linux Kernel’s perf tool that allows for privilege escalation. A local could exploit this flaw to run commands as root when using the perf tool. A flaw was discovered in the Xen subsystem of the Linux kernel when it provides a guest OS read-only access to disks that support TRIM or SCSI UNMAP. A privileged user in the guest OS could exploit this flaw to destroy data on the disk. Various other issues were also addressed.

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