USN-3901-1

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USN-3901-1

Summary: linux, linux-aws, linux-gcp, linux-kvm, linux-oem, linux-oracle, linux-raspi2 vulnerabilities

Details: Jann Horn discovered that the userfaultd implementation in the Linux kernel did not properly restrict access to certain ioctls. A local attacker could use this possibly to modify files. (CVE-2018-18397) It was discovered that the crypto subsystem of the Linux kernel leaked uninitialized memory to user space in some situations. A local attacker could use this to expose sensitive information (kernel memory). (CVE-2018-19854) Jann Horn discovered a race condition in the fork() system call in the Linux kernel. A local attacker could use this to gain access to services that cache authorizations. (CVE-2019-6133)

References: https://ubuntu.com/security/notices/USN-3901-1, https://ubuntu.com/security/CVE-2018-18397, https://ubuntu.com/security/CVE-2018-19854, https://ubuntu.com/security/CVE-2019-6133