Ubuntu Security Notice 4147-1 - It was discovered that the Intel Wi-Fi device driver in the Linux kernel did not properly validate certain Tunneled Direct Link Setup. A physically proximate attacker could use this to cause a denial of service. It was discovered that the Bluetooth UART implementation in the Linux kernel did not properly check for missing tty operations. A local attacker could use this to cause a denial of service. Various other issues were also addressed.
3a6e4f11022c15fdae9b2f86ea5e517ab1e88fd12af7e490e6b1aa835deb5cf2Ubuntu Security Notice 4145-1 - It was discovered that a race condition existed in the GFS2 file system in the Linux kernel. A local attacker could possibly use this to cause a denial of service. It was discovered that the IPv6 implementation in the Linux kernel did not properly validate socket options in some situations. A local attacker could use this to cause a denial of service or possibly execute arbitrary code. Various other issues were also addressed.
d8ef831cccbb75205a0fe90a3bdbf104e78019136be3165a75d091b11d684f97Ubuntu Security Notice 4115-2 - USN 4115-1 fixed vulnerabilities in the Linux 4.15 kernel for Ubuntu 18.04 LTS and Ubuntu 16.04 LTS. Unfortunately, as part of the update, a regression was introduced that caused a kernel crash when handling fragmented packets in some situations. This update addresses the issue. Various other issues were also addressed.
05acda341e120b77b16aad0ba3eb54346f60a3e3997eca4a108689927624648cUbuntu Security Notice 4115-1 - Hui Peng and Mathias Payer discovered that the Option USB High Speed driver in the Linux kernel did not properly validate metadata received from the device. A physically proximate attacker could use this to cause a denial of service. Zhipeng Xie discovered that an infinite loop could triggered in the CFS Linux kernel process scheduler. A local attacker could possibly use this to cause a denial of service. Various other issues were also addressed.
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