Ubuntu Security Notice 4419-1 - It was discovered that a race condition existed in the Precision Time Protocol implementation in the Linux kernel, leading to a use-after- free vulnerability. A local attacker could possibly use this to cause a denial of service or possibly execute arbitrary code. Matthew Sheets discovered that the SELinux network label handling implementation in the Linux kernel could be coerced into de-referencing a NULL pointer. A remote attacker could use this to cause a denial of service. Various other issues were also addressed.
4da1e70f72813a472a68df996a4ae3d56a0d2cc5f549bb57117ac1b67dbd4036Ubuntu Security Notice 4344-1 - It was discovered that the Intel Wi-Fi driver in the Linux kernel did not properly check for errors in some situations. A local attacker could possibly use this to cause a denial of service. It was discovered that the Intel WiMAX 2400 driver in the Linux kernel did not properly deallocate memory in certain situations. A local attacker could use this to cause a denial of service. Various other issues were also addressed.
8843a25d79794069c7f4af8f0b7bc644c52469c455abf6857c3eb07ff7d996f0Ubuntu Security Notice 4342-1 - Al Viro discovered that the Linux kernel for s390x systems did not properly perform page table upgrades for kernel sections that use secondary address mode. A local attacker could use this to cause a denial of service or execute arbitrary code. It was discovered that the Intel Wi-Fi driver in the Linux kernel did not properly check for errors in some situations. A local attacker could possibly use this to cause a denial of service. Various other issues were also addressed.
8be453bd452ae15bb83b01ddb47f279540dafd5d10a9322ef239871e73451623Ubuntu Security Notice 4324-1 - Al Viro discovered that the vfs layer in the Linux kernel contained a use- after-free vulnerability. A local attacker could use this to cause a denial of service or possibly expose sensitive information. Shijie Luo discovered that the ext4 file system implementation in the Linux kernel did not properly check for a too-large journal size. An attacker could use this to construct a malicious ext4 image that, when mounted, could cause a denial of service. Various other issues were also addressed.
3354b82b5136c0f1f9db6f7e2c046652c69628e3bd2119247ececc242c70ea9eUbuntu Security Notice 4318-1 - Al Viro discovered that the vfs layer in the Linux kernel contained a use- after-free vulnerability. A local attacker could use this to cause a denial of service or possibly expose sensitive information. Gustavo Romero and Paul Mackerras discovered that the KVM implementation in the Linux kernel for PowerPC processors did not properly keep guest state separate from host state. A local attacker in a KVM guest could use this to cause a denial of service. Various other issues were also addressed.
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