[USN-5137-2] Linux kernel vulnerabilities

========================================================================== Ubuntu Security Notice USN-5137-2 November 11, 2021
linux-bluefield, linux-gke-5.4, linux-oracle, linux-oracle-5.4 vulnerabilities ==========================================================================
A security issue affects these releases of Ubuntu and its derivatives:
– Ubuntu 20.04 LTS – Ubuntu 18.04 LTS
Summary:
Several security issues were fixed in the Linux kernel.
Software Description: – linux-bluefield: Linux kernel for NVIDIA BlueField platforms – linux-oracle: Linux kernel for Oracle Cloud systems – linux-gke-5.4: Linux kernel for Google Container Engine (GKE) systems – linux-oracle-5.4: Linux kernel for Oracle Cloud systems
Details:
It was discovered that the f2fs file system in the Linux kernel did not properly validate metadata in some situations. An attacker could use this to construct a malicious f2fs image that, when mounted and operated on, could cause a denial of service (system crash) or possibly execute arbitrary code. (CVE-2019-19449)
It was discovered that the Infiniband RDMA userspace connection manager implementation in the Linux kernel contained a race condition leading to a use-after-free vulnerability. A local attacker could use this to cause a denial of service (system crash) or possible execute arbitrary code. (CVE-2020-36385)
Wolfgang Frisch discovered that the ext4 file system implementation in the Linux kernel contained an integer overflow when handling metadata inode extents. An attacker could use this to construct a malicious ext4 file system image that, when mounted, could cause a denial of service (system crash). (CVE-2021-3428)
Benedict Schlueter discovered that the BPF subsystem in the Linux kernel did not properly protect against Speculative Store Bypass (SSB) side- channel attacks in some situations. A local attacker could possibly use this to expose sensitive information. (CVE-2021-34556)
Piotr Krysiuk discovered that the BPF subsystem in the Linux kernel did not properly protect against Speculative Store Bypass (SSB) side-channel attacks in some situations. A local attacker could possibly use this to expose sensitive information. (CVE-2021-35477)
It was discovered that the btrfs file system in the Linux kernel did not properly handle removing a non-existent device id. An attacker with CAP_SYS_ADMIN could use this to cause a denial of service. (CVE-2021-3739)
It was discovered that the Qualcomm IPC Router protocol implementation in the Linux kernel did not properly validate metadata in some situations. A local attacker could use this to cause a denial of service (system crash) or expose sensitive information. (CVE-2021-3743)
It was discovered that the virtual terminal (vt) device implementation in the Linux kernel contained a race condition in its ioctl handling that led to an out-of-bounds read vulnerability. A local attacker could possibly use this to expose sensitive information. (CVE-2021-3753)
It was discovered that the Linux kernel did not properly account for the memory usage of certain IPC objects. A local attacker could use this to cause a denial of service (memory exhaustion). (CVE-2021-3759)
Update instructions:
The problem can be corrected by updating your system to the following package versions:
Ubuntu 20.04 LTS: linux-image-5.4.0-1021-bluefield 5.4.0-1021.24 linux-image-5.4.0-1057-oracle 5.4.0-1057.61 linux-image-bluefield 5.4.0.1021.22 linux-image-oracle-lts-20.04 5.4.0.1057.57
Ubuntu 18.04 LTS: linux-image-5.4.0-1055-gke 5.4.0-1055.58~18.04.1 linux-image-5.4.0-1057-oracle 5.4.0-1057.61~18.04.1 linux-image-gke-5.4 5.4.0.1055.58~18.04.20 linux-image-oracle 5.4.0.1057.61~18.04.37
After a standard system update you need to reboot your computer to make all the necessary changes.
ATTENTION: Due to an unavoidable ABI change the kernel updates have been given a new version number, which requires you to recompile and reinstall all third party kernel modules you might have installed. Unless you manually uninstalled the standard kernel metapackages (e.g. linux-generic, linux-generic-lts-RELEASE, linux-virtual, linux-powerpc), a standard system upgrade will automatically perform this as well.
References: ubuntu.com/security/notices/USN-5137-2 ubuntu.com/security/notices/USN-5137-1 CVE-2019-19449, CVE-2020-36385, CVE-2021-3428, CVE-2021-34556, CVE-2021-35477, CVE-2021-3739, CVE-2021-3743, CVE-2021-3753, CVE-2021-3759
Package Information: launchpad.net/ubuntu/+source/linux-bluefield/5.4.0-1021.24 launchpad.net/ubuntu/+source/linux-oracle/5.4.0-1057.61 launchpad.net/ubuntu/+source/linux-gke-5.4/5.4.0-1055.58~18.04.1 launchpad.net/ubuntu/+source/linux-oracle-5.4/5.4.0-1057.61~18.04.1