Ubuntu Security Notice 3871-5 - Wen Xu discovered that a use-after-free vulnerability existed in the ext4 filesystem implementation in the Linux kernel. An attacker could use this to construct a malicious ext4 image that, when mounted, could cause a denial of service or possibly execute arbitrary code. Wen Xu discovered that a buffer overflow existed in the ext4 filesystem implementation in the Linux kernel. An attacker could use this to construct a malicious ext4 image that, when mounted, could cause a denial of service or possibly execute arbitrary code. Various other issues were also addressed.
a5d71e69056829a026e081231955a45dd385e4689768c26f0fa5281f7bb32196Ubuntu Security Notice 3878-2 - It was discovered that a race condition existed in the vsock address family implementation of the Linux kernel that could lead to a use-after-free condition. A local attacker in a guest virtual machine could use this to expose sensitive information. Cfir Cohen discovered that a use-after-free vulnerability existed in the KVM implementation of the Linux kernel, when handling interrupts in environments where nested virtualization is in use. A local attacker in a guest VM could possibly use this to gain administrative privileges in a host machine. Various other issues were also addressed.
836e2d26e3cb7e111d07f62c277179c810b8d3827600b341b6da1a764f655919Ubuntu Security Notice 3871-3 - Wen Xu discovered that a use-after-free vulnerability existed in the ext4 filesystem implementation in the Linux kernel. An attacker could use this to construct a malicious ext4 image that, when mounted, could cause a denial of service or possibly execute arbitrary code. Wen Xu discovered that a buffer overflow existed in the ext4 filesystem implementation in the Linux kernel. An attacker could use this to construct a malicious ext4 image that, when mounted, could cause a denial of service or possibly execute arbitrary code. Various other issues were also addressed.
1041b56c301afb52ce67b7fd6cc20810a44176e8fb1e082b236d07915a47660aUbuntu Security Notice 3878-1 - It was discovered that a race condition existed in the vsock address family implementation of the Linux kernel that could lead to a use-after-free condition. A local attacker in a guest virtual machine could use this to expose sensitive information. Cfir Cohen discovered that a use-after-free vulnerability existed in the KVM implementation of the Linux kernel, when handling interrupts in environments where nested virtualization is in use. A local attacker in a guest VM could possibly use this to gain administrative privileges in a host machine. Various other issues were also addressed.
53443e7ab73989a11fa42178ed663148853ae0460bc906e43bd330b74c010761Ubuntu Security Notice 3871-4 - USN-3871-1 fixed vulnerabilities in the Linux kernel for Ubuntu 18.04 LTS. This update provides the corresponding updates for the Linux Hardware Enablement kernel from Ubuntu 18.04 LTS for Ubuntu 16.04 LTS. Wen Xu discovered that a use-after-free vulnerability existed in the ext4 filesystem implementation in the Linux kernel. An attacker could use this to construct a malicious ext4 image that, when mounted, could cause a denial of service or possibly execute arbitrary code. Various other issues were also addressed.
a11206552fc0cabc9183c5f6c62349248af6aeafede8241f7d11f3a3f97109b7Ubuntu Security Notice 3871-2 - USN-3871-1 fixed vulnerabilities in the Linux kernel for Ubuntu 18.04 LTS. Unfortunately, that update introduced regressions with docking station displays and mounting ext4 file systems with the meta_bg option enabled. This update fixes the problems. Various other issues were also addressed.
b3e1923af0fea3e3581de72bb292c33d319b54f08b70c8d14fd63f3ae53a3166Ubuntu Security Notice 3872-1 - It was discovered that a race condition existed in the vsock address family implementation of the Linux kernel that could lead to a use-after-free condition. A local attacker in a guest virtual machine could use this to expose sensitive information. Cfir Cohen discovered that a use-after-free vulnerability existed in the KVM implementation of the Linux kernel, when handling interrupts in environments where nested virtualization is in use. A local attacker in a guest VM could possibly use this to gain administrative privileges in a host machine. Various other issues were also addressed.
4db2756d9eb8ba255e08ce015e2fad82f619501758cfcb7947e8a9d0b67adbceUbuntu Security Notice 3871-1 - Wen Xu discovered that a use-after-free vulnerability existed in the ext4 filesystem implementation in the Linux kernel. An attacker could use this to construct a malicious ext4 image that, when mounted, could cause a denial of service or possibly execute arbitrary code. Wen Xu discovered that a buffer overflow existed in the ext4 filesystem implementation in the Linux kernel. An attacker could use this to construct a malicious ext4 image that, when mounted, could cause a denial of service or possibly execute arbitrary code. Various other issues were also addressed.
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