Ubuntu Security Notice 4984-1 - Jan Beulich discovered that the Xen netback backend in the Linux kernel did not properly handle certain error conditions under paravirtualization. An attacker in a guest VM could possibly use this to cause a denial of service. It was discovered that the Realtek RTL8188EU Wireless device driver in the Linux kernel did not properly validate ssid lengths in some situations. An attacker could use this to cause a denial of service. Various other issues were also addressed.
47d0f4a3952d8cf4b938ec83f7efd85bdb8431f9f1a68e359b4de49fcf50d2edUbuntu Security Notice 4979-1 - Kiyin discovered that the NFC LLCP protocol implementation in the Linux kernel contained a reference counting error. A local attacker could use this to cause a denial of service. Kiyin discovered that the NFC LLCP protocol implementation in the Linux kernel did not properly deallocate memory in certain error situations. A local attacker could use this to cause a denial of service. Various other issues were also addressed.
90a7c669862e49045b1de1c602699d7bb48ce1cffe8fc4484aa9b83a8c441860Ubuntu Security Notice 4945-2 - USN-4945-1 fixed vulnerabilities in the Linux kernel for Ubuntu 20.04 LTS and Ubuntu 18.04 LTS. This update provides the corresponding Linux kernel updates targeted specifically for Raspberry Pi devices in those same Ubuntu Releases. It was discovered that the Nouveau GPU driver in the Linux kernel did not properly handle error conditions in some situations. A local attacker could use this to cause a denial of service. Various other issues were also addressed.
b7d2e192331fc5eeec68d356aef0b7b1f58186fdabc93af9473f0e7868618fd2Ubuntu Security Notice 4945-1 - It was discovered that the Nouveau GPU driver in the Linux kernel did not properly handle error conditions in some situations. A local attacker could use this to cause a denial of service. Jan Beulich discovered that the Xen netback backend in the Linux kernel did not properly handle certain error conditions under paravirtualization. An attacker in a guest VM could possibly use this to cause a denial of service. Various other issues were also addressed.
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