Linux Kernel Privilege Escalation Vulnerability. Actively exploited: CISA added this vulnerability to its Known Exploited Vulnerabilities catalog on 25/04/2022. Patch affected systems as an emergency.
| Package | Affected versions | Patched versions |
|---|---|---|
| ovirt-engine | = 4.4.10.2 | |
| virtualization host | = 4.0 |
A flaw was found in the way the "flags" member of the new pipe buffer structure was lacking proper initialization in copy_page_to_iter_pipe and push_pipe functions in the Linux kernel and could thus contain stale values. An unprivileged local user could use this flaw to write to pages in the page cache backed by read only files and as such escalate their privileges on the system.
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