CVE-2022-0847

CVE-2022-0847 is a high-severity vulnerability in Redhat Enterprise Linux with a CVSS 3.x base score of 7.8. It is listed in CISA's Known Exploited Vulnerabilities (KEV) catalog, confirming it has been exploited in the wild (added 2022-04-25). The underlying weakness is classified as CWE-665.

Key facts

Description

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.

Frequently asked questions

What is CVE-2022-0847?
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.
How severe is CVE-2022-0847?
CVE-2022-0847 has a CVSS 3.x base score of 7.8, rated high severity. It is exploitable over local access with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2022-0847 being actively exploited?
Yes. CVE-2022-0847 is on CISA's Known Exploited Vulnerabilities (KEV) catalog, added on 2022-04-25, which means active exploitation has been confirmed. It should be prioritised for remediation.
What products are affected by CVE-2022-0847?
CVE-2022-0847 primarily affects Redhat Enterprise Linux. In total, 40 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2022-0847?
Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Because this CVE is known to be actively exploited, treat remediation as urgent — CISA KEV typically sets a short remediation deadline.
Does CVE-2022-0847 have an EU (EUVD) identifier?
Yes. CVE-2022-0847 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2022-15890. It is also flagged as exploited in the EUVD (since 2022-04-25).
When was CVE-2022-0847 published?
CVE-2022-0847 was published on 2022-03-10 and last updated on 2026-06-17.

References

Affected products (40)

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