USN-5470-1

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USN-5470-1

Summary: linux-oem-5.14 vulnerabilities

Details: It was discovered that the Linux kernel did not properly restrict access to the kernel debugger when booted in secure boot environments. A privileged attacker could use this to bypass UEFI Secure Boot restrictions. (CVE-2022-21499) Aaron Adams discovered that the netfilter subsystem in the Linux kernel did not properly handle the removal of stateful expressions in some situations, leading to a use-after-free vulnerability. A local attacker could use this to cause a denial of service (system crash) or execute arbitrary code. (CVE-2022-1966) Minh Yuan discovered that the floppy driver in the Linux kernel contained a race condition in some situations, 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-2022-1836) Ziming Zhang discovered that the netfilter subsystem in the Linux kernel did not properly validate sets with multiple ranged fields. A local attacker could use this to cause a denial of service or execute arbitrary code. (CVE-2022-1972)

References: https://ubuntu.com/security/notices/USN-5470-1, https://ubuntu.com/security/CVE-2022-1836, https://ubuntu.com/security/CVE-2022-1966, https://ubuntu.com/security/CVE-2022-1972, https://ubuntu.com/security/CVE-2022-21499