Privilege Escalation Vulnerability in Linux Kernel by Red Hat
CVE-2022-0847

7.8HIGH

Key Information:

Vendor
Linux
Status
Vendor
CVE Published:
10 March 2022

Badges

👾 Exploit Exists🟡 Public PoC🦅 CISA Reported

Summary

A vulnerability exists in the Linux kernel related to improper initialization of the 'flags' member of the new pipe buffer structure. This absence of proper initialization in the copy_page_to_iter_pipe and push_pipe functions can result in the presence of stale values. As a consequence, an unprivileged local user may exploit this flaw to write to pages in the page cache that are associated with read-only files, enabling privilege escalation on the affected system.

CISA Reported

CISA provides regional cyber and physical services to support security and resilience across the United States. CISA monitor the most dangerious vulnerabilities and have identifed as being exploited but is not known by the CISA to be used in ransomware campaigns. This is subject to change at pace

The CISA's recommendation is: Apply updates per vendor instructions.

Affected Version(s)

kernel Linux Kernel 5.17 rc6

Exploit Proof of Concept (PoC)

PoC code is written by security researchers to demonstrate the vulnerability can be exploited. PoC code is also a key component for weaponization which could lead to ransomware.

References

CVSS V3.1

Score:
7.8
Severity:
HIGH
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Local
Attack Complexity:
Low
Privileges Required:
Low
User Interaction:
None
Scope:
Unchanged

Timeline

  • 🟡

    Public PoC available

  • 👾

    Exploit known to exist

  • 🦅

    CISA Reported

  • Vulnerability published

  • Vulnerability Reserved

.