[USN-5413-1] Linux kernel vulnerabilities


========================================================================== Ubuntu Security Notice USN-5413-1 May 12, 2022
linux, linux-aws, linux-kvm, linux-lts-xenial vulnerabilities ==========================================================================
A security issue affects these releases of Ubuntu and its derivatives:
– Ubuntu 16.04 ESM – Ubuntu 14.04 ESM
Summary:
Several security issues were fixed in the Linux kernel.
Software Description: – linux: Linux kernel – linux-aws: Linux kernel for Amazon Web Services (AWS) systems – linux-kvm: Linux kernel for cloud environments – linux-lts-xenial: Linux hardware enablement kernel from Xenial for Trusty
Details:
Jeremy Cline discovered a use-after-free in the nouveau graphics driver of the Linux kernel during device removal. A privileged or physically proximate attacker could use this to cause a denial of service (system crash). (CVE-2020-27820)
It was discovered that a race condition existed in the network scheduling subsystem of the Linux kernel, leading to a use-after-free vulnerability. A local attacker could use this to cause a denial of service (system crash) or possibly execute arbitrary code. (CVE-2021-39713)
It was discovered that the Parallel NFS (pNFS) implementation in the Linux kernel did not properly perform bounds checking in some situations. An attacker could use this to cause a denial of service (system crash) or possibly execute arbitrary code. (CVE-2021-4157)
It was discovered that the ST21NFCA NFC driver in the Linux kernel did not properly validate the size of certain data in EVT_TRANSACTION events. A physically proximate attacker could use this to cause a denial of service (system crash) or possibly execute arbitrary code. (CVE-2022-26490)
It was discovered that the Xilinx USB2 device gadget driver in the Linux kernel did not properly validate endpoint indices from the host. A physically proximate attacker could possibly use this to cause a denial of service (system crash). (CVE-2022-27223)
It was discovered that the EMS CAN/USB interface implementation in the Linux kernel contained a double-free vulnerability when handling certain error conditions. A local attacker could use this to cause a denial of service (memory exhaustion). (CVE-2022-28390)
Update instructions:
The problem can be corrected by updating your system to the following package versions:
Ubuntu 16.04 ESM: linux-image-4.4.0-1105-kvm 4.4.0-1105.114 linux-image-4.4.0-1140-aws 4.4.0-1140.154 linux-image-4.4.0-224-generic 4.4.0-224.257 linux-image-4.4.0-224-lowlatency 4.4.0-224.257 linux-image-aws 4.4.0.1140.145 linux-image-generic 4.4.0.224.231 linux-image-kvm 4.4.0.1105.103 linux-image-lowlatency 4.4.0.224.231 linux-image-virtual 4.4.0.224.231
Ubuntu 14.04 ESM: linux-image-4.4.0-224-generic 4.4.0-224.257~14.04.1 linux-image-4.4.0-224-lowlatency 4.4.0-224.257~14.04.1 linux-image-generic-lts-xenial 4.4.0.224.195 linux-image-lowlatency-lts-xenial 4.4.0.224.195 linux-image-virtual-lts-xenial 4.4.0.224.195
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-5413-1 CVE-2020-27820, CVE-2021-39713, CVE-2021-4157, CVE-2022-26490, CVE-2022-27223, CVE-2022-28390