USN-4911-1

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USN-4911-1

Summary: linux-oem-5.10 vulnerabilities

Details: 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 (system crash). (CVE-2020-25639) 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 (host domain crash). (CVE-2021-28038) It was discovered that the fastrpc driver in the Linux kernel did not prevent user space applications from sending kernel RPC messages. A local attacker could possibly use this to gain elevated privileges. (CVE-2021-28375) It was discovered that the fuse user space file system implementation in the Linux kernel did not properly handle bad inodes in some situations. A local attacker could possibly use this to cause a denial of service. (CVE-2021-28950)

References: https://ubuntu.com/security/notices/USN-4911-1, https://ubuntu.com/security/CVE-2020-25639, https://ubuntu.com/security/CVE-2021-28038, https://ubuntu.com/security/CVE-2021-28375, https://ubuntu.com/security/CVE-2021-28950