Debian DSA-5191-1 Critical: Linux Kernel Privilege Escalation and DoS

Several vulnerabilities have been discovered in the Linux kernel that may
lead to privilege escalation, denial of service or information leaks:

CVE-2021-33655

A user with access to a framebuffer console driver could cause a
memory out-of-bounds write via the FBIOPUT_VSCREENINFO ioctl.

CVE-2022-2318

A use-after-free in the Amateur Radio X.25 PLP (Rose) support may
result in denial of service.

CVE-2022-26365 / CVE-2022-33740 / CVE-2022-33741 / CVE-2022-33742

Roger Pau Monne discovered that Xen block and network PV device
frontends don't zero out memory regions before sharing them with the
backend, which may result in information disclosure. Additionally it
was discovered that the granularity of the grant table doesn't permit
sharing less than a 4k page, which may also result in information
disclosure.

CVE-2022-33743

Jan Beulich discovered that incorrect memory handling in the Xen
network backend may lead to denial of service.

CVE-2022-33744

Oleksandr T...