SynopsisThe remote Ubuntu host is missing one or more security-related patches.
DescriptionIt was discovered that an integer overflow error existed in the SCSI generic (sg) driver in the Linux kernel. A local attacker with write permission to a SCSI generic device could use this to cause a denial of service (system crash) or potentially escalate their privileges.
Marc-Andre Lureau discovered that the vhost driver did not properly release the userspace provided log file descriptor. A privileged attacker could use this to cause a denial of service (resource exhaustion). (CVE-2015-6252)
It was discovered that the Linux kernel's perf subsystem did not bound callchain backtraces on PowerPC 64. A local attacker could use this to cause a denial of service. (CVE-2015-6526).
Note that Tenable Network Security has extracted the preceding description block directly from the Ubuntu security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.
SolutionUpdate the affected packages.