It was discovered that the PHP Fileinfo component incorrectly handled certain magic files. An attacker could use this issue to cause PHP to crash, resulting in a denial of service, or possibly execute arbitrary code. This issue only affected Ubuntu 16.04 LTS. (CVE-2015-8865) Hans Jerry Illikainen discovered that the PHP Zip extension incorrectly handled certain malformed Zip archives. A remote attacker could use this issue to cause PHP to crash, resulting in a denial of service, or possibly execute arbitrary code. This issue only affected Ubuntu 16.04 LTS. (CVE-2016-3078) It was discovered that PHP incorrectly handled invalid indexes in the SplDoublyLinkedList class. An attacker could use this issue to cause PHP to crash, resulting in a denial of service, or possibly execute arbitrary code. This issue only affected Ubuntu 16.04 LTS. (CVE-2016-3132) It was discovered that the PHP rawurlencode() function incorrectly handled large strings. A remote attacker could use this issue to cause PHP to crash, resulting in a denial of service. This issue only affected Ubuntu 16.04 LTS. (CVE-2016-4070) It was discovered that the PHP phpsnmperror() function incorrectly handled string formatting. A remote attacker could use this issue to cause PHP to crash, resulting in a denial of service, or possibly execute arbitrary code. This issue only affected Ubuntu 16.04 LTS. (CVE-2016-4071) It was discovered that the PHP phar extension incorrectly handled certain filenames in archives. A remote attacker could use this issue to cause PHP to crash, resulting in a denial of service, or possibly execute arbitrary code. This issue only affected Ubuntu 16.04 LTS. (CVE-2016-4072) It was discovered that the PHP mbstrcut() function incorrectly handled string formatting. A remote attacker could use this issue to cause PHP to crash, resulting in a denial of service, or possibly execute arbitrary code. This issue only affected Ubuntu 16.04 LTS. (CVE-2016-4073) It was discovered that the PHP phar extension incorrectly handled certain archive files. A remote attacker could use this issue to cause PHP to crash, resulting in a denial of service, or possibly execute arbitrary code. This issue only affected Ubuntu 12.04 LTS, Ubuntu 14.04 LTS and Ubuntu 15.10. (CVE-2016-4342, CVE-2016-4343) It was discovered that the PHP bcpowmod() function incorrectly handled memory. A remote attacker could use this issue to cause PHP to crash, resulting in a denial of service, or possibly execute arbitrary code. (CVE-2016-4537, CVE-2016-4538) It was discovered that the PHP XML parser incorrectly handled certain malformed XML data. A remote attacker could possibly use this issue to cause PHP to crash, resulting in a denial of service, or possibly execute arbitrary code. (CVE-2016-4539) It was discovered that certain PHP grapheme functions incorrectly handled negative offsets. A remote attacker could possibly use this issue to cause PHP to crash, resulting in a denial of service. (CVE-2016-4540, CVE-2016-4541) It was discovered that PHP incorrectly handled certain malformed EXIF tags. A remote attacker could possibly use this issue to cause PHP to crash, resulting in a denial of service. (CVE-2016-4542, CVE-2016-4543, CVE-2016-4544)

It was discovered that the PHP Zip extension incorrectly handled directories when processing certain zip files. A remote attacker could possibly use this issue to create arbitrary directories. (CVE-2014-9767) It was discovered that the PHP Soap client incorrectly validated data types. A remote attacker could use this issue to cause PHP to crash, resulting in a denial of service, or possibly execute arbitrary code. (CVE-2015-8835, CVE-2016-3185) It was discovered that the PHP MySQL native driver incorrectly handled TLS connections to MySQL databases. A machine-in-the-middle attacker could possibly use this issue to downgrade and snoop on TLS connections. This vulnerability is known as BACKRONYM. (CVE-2015-8838) It was discovered that PHP incorrectly handled the imagerotate function. A remote attacker could use this issue to cause PHP to crash, resulting in a denial of service, or possibly obtain sensitive information. This issue only applied to Ubuntu 14.04 LTS and Ubuntu 15.10. (CVE-2016-1903) Hans Jerry Illikainen discovered that the PHP phar extension incorrectly handled certain tar archives. A remote attacker could use this issue to cause PHP to crash, resulting in a denial of service, or possibly execute arbitrary code. (CVE-2016-2554) It was discovered that the PHP WDDX extension incorrectly handled certain malformed XML data. A remote attacker could possibly use this issue to cause PHP to crash, resulting in a denial of service, or possibly execute arbitrary code. (CVE-2016-3141) It was discovered that the PHP phar extension incorrectly handled certain zip files. A remote attacker could use this issue to cause PHP to crash, resulting in a denial of service, or possibly obtain sensitive information. (CVE-2016-3142) It was discovered that the PHP libxmldisableentityloader() setting was shared between threads. When running under PHP-FPM, this could result in XML external entity injection and entity expansion issues. This issue only applied to Ubuntu 12.04 LTS and Ubuntu 14.04 LTS. (No CVE number) It was discovered that the PHP opensslrandompseudobytes() function did not return cryptographically strong pseudo-random bytes. (No CVE number) It was discovered that the PHP Fileinfo component incorrectly handled certain magic files. An attacker could use this issue to cause PHP to crash, resulting in a denial of service, or possibly execute arbitrary code. (CVE number pending) It was discovered that the PHP phpsnmperror() function incorrectly handled string formatting. A remote attacker could use this issue to cause PHP to crash, resulting in a denial of service, or possibly execute arbitrary code. This issue only applied to Ubuntu 14.04 LTS and Ubuntu 15.10. (CVE number pending) It was discovered that the PHP rawurlencode() function incorrectly handled large strings. A remote attacker could use this issue to cause PHP to crash, resulting in a denial of service. (CVE number pending) It was discovered that the PHP phar extension incorrectly handled certain filenames in archives. A remote attacker could use this issue to cause PHP to crash, resulting in a denial of service, or possibly execute arbitrary code. (CVE number pending) It was discovered that the PHP mbstrcut() function incorrectly handled string formatting. A remote attacker could use this issue to cause PHP to crash, resulting in a denial of service, or possibly execute arbitrary code. (CVE number pending)

Sebastian Krahmer discovered that Squid incorrectly handled certain SNMP requests. If SNMP is enabled, a remote attacker could use this issue to cause Squid to crash, resulting in a denial of service, or possibly execute arbitrary code. (CVE-2014-6270) Alex Rousskov discovered that Squid incorrectly handled certain malformed responses. A remote attacker could possibly use this issue to cause Squid to crash, resulting in a denial of service. (CVE-2016-2571)

It was discovered that Expat unexpectedly called srand in certain circumstances. This could reduce the security of calling applications. (CVE-2012-6702) It was discovered that Expat incorrectly handled seeding the random number generator. A remote attacker could possibly use this issue to cause a denial of service. (CVE-2016-5300)

Shayan Sadigh discovered that OpenSSH incorrectly handled environment files when the UseLogin feature is enabled. A local attacker could use this issue to gain privileges. (CVE-2015-8325) Ben Hawkes discovered that OpenSSH incorrectly handled certain network traffic. A remote attacker could possibly use this issue to cause OpenSSH to crash, resulting in a denial of service. This issue only applied to Ubuntu 15.10. (CVE-2016-1907) Thomas Hoger discovered that OpenSSH incorrectly handled untrusted X11 forwarding when the SECURITY extension is disabled. A connection configured as being untrusted could get switched to trusted in certain scenarios, contrary to expectations. (CVE-2016-1908) It was discovered that OpenSSH incorrectly handled certain X11 forwarding data. A remote authenticated attacker could possibly use this issue to bypass certain intended command restrictions. (CVE-2016-3115)

Andreas Cord-Landwehr discovered that KDE-Libs incorrectly handled extracting certain archives. If a user were tricked into extracting a specially-crafted archive, a remote attacker could use this issue to overwrite arbitrary files out of the extraction directory.

halfdog discovered that OverlayFS, when mounting on top of a FUSE mount, incorrectly propagated file attributes, including setuid. A local unprivileged attacker could use this to gain privileges. (CVE-2016-1576) halfdog discovered that OverlayFS in the Linux kernel incorrectly propagated security sensitive extended attributes, such as POSIX ACLs. A local unprivileged attacker could use this to gain privileges. (CVE-2016-1575) It was discovered that the Linux kernel did not properly enforce rlimits for file descriptors sent over UNIX domain sockets. A local attacker could use this to cause a denial of service. (CVE-2013-4312) It was discovered that the Linux kernel's Filesystem in Userspace (FUSE) implementation did not handle initial zero length segments properly. A local attacker could use this to cause a denial of service (unkillable task). (CVE-2015-8785) Andy Lutomirski discovered a race condition in the Linux kernel's translation lookaside buffer (TLB) handling of flush events. A local attacker could use this to cause a denial of service or possibly leak sensitive information. (CVE-2016-2069)

Ralf Spenneberg discovered that the Aiptek Tablet USB device driver in the Linux kernel did not properly validate the endpoints reported by the device. An attacker with physical access could cause a denial of service (system crash). (CVE-2015-7515) Zach Riggle discovered that the Linux kernel's list poison feature did not take into account the mmapminaddr value. A local attacker could use this to bypass the kernel's poison-pointer protection mechanism while attempting to exploit an existing kernel vulnerability. (CVE-2016-0821) Ralf Spenneberg discovered that the USB sound subsystem in the Linux kernel did not properly validate USB device descriptors. An attacker with physical access could use this to cause a denial of service (system crash). (CVE-2016-2184) Ralf Spenneberg discovered that the ATI Wonder Remote II USB driver in the Linux kernel did not properly validate USB device descriptors. An attacker with physical access could use this to cause a denial of service (system crash). (CVE-2016-2185) Ralf Spenneberg discovered that the PowerMate USB driver in the Linux kernel did not properly validate USB device descriptors. An attacker with physical access could use this to cause a denial of service (system crash). (CVE-2016-2186) Ralf Spenneberg discovered that the I/O-Warrior USB device driver in the Linux kernel did not properly validate USB device descriptors. An attacker with physical access could use this to cause a denial of service (system crash). (CVE-2016-2188) Sergej Schumilo, Hendrik Schwartke, and Ralf Spenneberg discovered that the MCT USB RS232 Converter device driver in the Linux kernel did not properly validate USB device descriptors. An attacker with physical access could use this to cause a denial of service (system crash). (CVE-2016-3136) Sergej Schumilo, Hendrik Schwartke, and Ralf Spenneberg discovered that the Cypress M8 USB device driver in the Linux kernel did not properly validate USB device descriptors. An attacker with physical access could use this to cause a denial of service (system crash). (CVE-2016-3137) Sergej Schumilo, Hendrik Schwartke, and Ralf Spenneberg discovered that the USB abstract device control driver for modems and ISDN adapters did not validate endpoint descriptors. An attacker with physical access could use this to cause a denial of service (system crash). (CVE-2016-3138) Sergej Schumilo, Hendrik Schwartke, and Ralf Spenneberg discovered that the Linux kernel's USB driver for Digi AccelePort serial converters did not properly validate USB device descriptors. An attacker with physical access could use this to cause a denial of service (system crash). (CVE-2016-3140) It was discovered that the IPv4 implementation in the Linux kernel did not perform the destruction of inet device objects properly. An attacker in a guest OS could use this to cause a denial of service (networking outage) in the host OS. (CVE-2016-3156) Andy Lutomirski discovered that the Linux kernel did not properly context- switch IOPL on 64-bit PV Xen guests. An attacker in a guest OS could use this to cause a denial of service (guest OS crash), gain privileges, or obtain sensitive information. (CVE-2016-3157) It was discovered that the Linux kernel's USB driver for IMS Passenger Control Unit devices did not properly validate the device's interfaces. An attacker with physical access could use this to cause a denial of service (system crash). (CVE-2016-3689)

Jan Beulich discovered that the KVM svm hypervisor implementation in the Linux kernel did not properly catch Debug exceptions on AMD processors. An attacker in a guest virtual machine could use this to cause a denial of service (system crash) in the host OS. (CVE-2015-8104) 郭永刚 discovered that the ppp implementation in the Linux kernel did not ensure that certain slot numbers are valid. A local attacker with the privilege to call ioctl() on /dev/ppp could cause a denial of service (system crash). (CVE-2015-7799) Dmitry Vyukov discovered that the Linux kernel's keyring handler attempted to garbage collect incompletely instantiated keys. A local unprivileged attacker could use this to cause a denial of service (system crash). (CVE-2015-7872) It was discovered that the virtual video osd test driver in the Linux kernel did not properly initialize data structures. A local attacker could use this to obtain sensitive information from the kernel. (CVE-2015-7884) It was discovered that the driver for Digi Neo and ClassicBoard devices did not properly initialize data structures. A local attacker could use this to obtain sensitive information from the kernel. (CVE-2015-7885)

Felix Wilhelm discovered a race condition in the Xen paravirtualized drivers which can cause double fetch vulnerabilities. An attacker in the paravirtualized guest could exploit this flaw to cause a denial of service (crash the host) or potentially execute arbitrary code on the host. (CVE-2015-8550) Konrad Rzeszutek Wilk discovered the Xen PCI backend driver does not perform consistency checks on the device's state. An attacker could exploit this flaw to cause a denial of service (NULL dereference) on the host. (CVE-2015-8551) Konrad Rzeszutek Wilk discovered the Xen PCI backend driver does not perform consistency checks on the device's state. An attacker could exploit this flaw to cause a denial of service by flooding the logging system with WARN() messages causing the initial domain to exhaust disk space. (CVE-2015-8552) Jann Horn discovered a ptrace issue with user namespaces in the Linux kernel. The namespace owner could potentially exploit this flaw by ptracing a root owned process entering the user namespace to elevate its privileges and potentially gain access outside of the namespace. (http://bugs.launchpad.net/bugs/1527374, CVE-2015-8709)

Qinghao Tang discovered that QEMU incorrectly handled PCI MSI-X support. An attacker inside the guest could use this issue to cause QEMU to crash, resulting in a denial of service. This issue only affected Ubuntu 14.04 LTS and Ubuntu 15.10. (CVE-2015-7549) Lian Yihan discovered that QEMU incorrectly handled the VNC server. A remote attacker could use this issue to cause QEMU to crash, resulting in a denial of service. (CVE-2015-8504) Felix Wilhelm discovered a race condition in the Xen paravirtualized drivers which can cause double fetch vulnerabilities. An attacker in the paravirtualized guest could exploit this flaw to cause a denial of service (crash the host) or potentially execute arbitrary code on the host. (CVE-2015-8550) Qinghao Tang discovered that QEMU incorrectly handled USB EHCI emulation support. An attacker inside the guest could use this issue to cause QEMU to consume resources, resulting in a denial of service. (CVE-2015-8558) Qinghao Tang discovered that QEMU incorrectly handled the vmxnet3 device. An attacker inside the guest could use this issue to cause QEMU to consume resources, resulting in a denial of service. This issue only affected Ubuntu 14.04 LTS and Ubuntu 15.10. (CVE-2015-8567, CVE-2015-8568) Qinghao Tang discovered that QEMU incorrectly handled SCSI MegaRAID SAS HBA emulation. An attacker inside the guest could use this issue to cause QEMU to crash, resulting in a denial of service. This issue only affected Ubuntu 14.04 LTS and Ubuntu 15.10. (CVE-2015-8613) Ling Liu discovered that QEMU incorrectly handled the Human Monitor Interface. A local attacker could use this issue to cause QEMU to crash, resulting in a denial of service. This issue only affected Ubuntu 14.04 LTS and Ubuntu 15.10. (CVE-2015-8619, CVE-2016-1922) David Alan Gilbert discovered that QEMU incorrectly handled the Q35 chipset emulation when performing VM guest migrations. An attacker could use this issue to cause QEMU to crash, resulting in a denial of service. This issue only affected Ubuntu 14.04 LTS and Ubuntu 15.10. (CVE-2015-8666) Ling Liu discovered that QEMU incorrectly handled the NE2000 device. An attacker inside the guest could use this issue to cause QEMU to crash, resulting in a denial of service. (CVE-2015-8743) It was discovered that QEMU incorrectly handled the vmxnet3 device. An attacker inside the guest could use this issue to cause QEMU to crash, resulting in a denial of service. This issue only affected Ubuntu 14.04 LTS and Ubuntu 15.10. (CVE-2015-8744, CVE-2015-8745) Qinghao Tang discovered that QEMU incorrect handled IDE AHCI emulation. An attacker inside the guest could use this issue to cause a denial of service, or possibly execute arbitrary code on the host as the user running the QEMU process. In the default installation, when QEMU is used with libvirt, attackers would be isolated by the libvirt AppArmor profile. (CVE-2016-1568) Donghai Zhu discovered that QEMU incorrect handled the firmware configuration device. An attacker inside the guest could use this issue to cause a denial of service, or possibly execute arbitrary code on the host as the user running the QEMU process. In the default installation, when QEMU is used with libvirt, attackers would be isolated by the libvirt AppArmor profile. (CVE-2016-1714) It was discovered that QEMU incorrectly handled the e1000 device. An attacker inside the guest could use this issue to cause QEMU to crash, resulting in a denial of service. (CVE-2016-1981) Zuozhi Fzz discovered that QEMU incorrectly handled IDE AHCI emulation. An attacker inside the guest could use this issue to cause QEMU to crash, resulting in a denial of service. This issue only affected Ubuntu 15.10. (CVE-2016-2197) Zuozhi Fzz discovered that QEMU incorrectly handled USB EHCI emulation. An attacker inside the guest could use this issue to cause QEMU to crash, resulting in a denial of service. This issue only affected Ubuntu 14.04 LTS and Ubuntu 15.10. (CVE-2016-2198)

Jann Horn discovered a ptrace issue with user namespaces in the Linux kernel. The namespace owner could potentially exploit this flaw by ptracing a root owned process entering the user namespace to elevate its privileges and potentially gain access outside of the namespace. (http://bugs.launchpad.net/bugs/1527374, CVE-2015-8709)