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CISA KEV · ACTIVELY EXPLOITED
HIGH severity

CVE-2022-0847 — ovirt-engine

HIGH

CVE-2022-0847 is a high-severity (CVSS 7.8) CWE-665 vulnerability. It is in CISA's Known Exploited Vulnerabilities catalog (added 2022-04-25) — treat it as actively exploited and patch now. No vendor fix is recorded yet; mitigation options are listed below.

Also known asA-220741611ASB-A-220741611
Published
Updated
Affected
29 products
Patched
See advisory
Exploits
95 known
Exploitation data as of Oct 22, 2026 · OSV.dev, NVD, CISA KEV, FIRST.org (EPSS)

Exploitation Status

Actively exploited in the wild

  • Confirmed by CISA's Known Exploited Vulnerabilities catalog on 2022-04-25. Federal agencies were required to remediate by 2022-05-16.
  • A successful exploit gives an attacker total control of the affected component, not partial access.

Exploitation and automatability from CISA (KEV catalog and SSVC triage) for CVE-2022-0847.

EPSS Exploitation Probability

via FIRST.org ↗
92.8%probability of exploitation in next 30 days
Very High Risk0.00%
Lower risk than most CVEs100th percentile — riskier than 100% of all scored CVEsHighest risk
78.7%84.5%90.3%96.0%82.7%92.8%Apr 26Aug 26Oct 26

Probability of exploitation in the next 30 days, from FIRST.org EPSS.

How urgent is this, really

CVE-2022-0847 by exploitation likelihood (EPSS) against impact (CVSS). In the shaded patch-first corner (EPSS 50%+, CVSS 7.0+).

Where this sits among everything scored

Of 395,249 CVEs with a current EPSS score, this one falls in the ≥ 90% band (highlighted). Counts from FIRST.org, log-scaled.

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.

Affected Products

29 products · 42 configurations
OS
fedorafedoraproject
1 version
35
OS
linux kernellinux
≥ 5.16 && < 5.16.11
range
OS
h300e firmwarenetapp
all
OS
h300s firmwarenetapp
all
OS
h410c firmwarenetapp
all
OS
h410s firmwarenetapp
all
Exploits & PoCs
95

Research use only. For defensive security, authorized penetration testing, and academic research only. Never execute exploit code against systems without explicit written authorization.

EDB-50808locallinux

Linux Kernel 5.8 < 5.16.11 - Local Privilege Escalation (DirtyPipe)

by Lance Biggerstaff · Mar 8, 2022

Exploit-DB Source

Detection & mitigation playbook

Vulnerability

  1. Detect

    Identify every host running the affected component and compare the installed build against the fixed version below — for source-built or distro-packaged software the version string, not a lockfile, is the source of truth (`dpkg -l`, `rpm -q`, or the binary's own `--version`).

  2. Remediation status

    No fixed release is recorded for CVE-2022-0847 yet. Track the upstream advisory, and apply the exposure-reduction steps below in the meantime.

  3. Mitigate without a patch

    If you can't upgrade right away: gate or disable the affected feature, validate untrusted input at the boundary, and avoid passing attacker-controlled data into the vulnerable path. O3's runtime protection blocks exploitation in production as an interim safeguard until the upgrade lands.

Fixing This On Your OS

If you run this on a Linux distribution, patch through your package manager against the distro's own security advisory below — it tracks the exact backported fix for your release, which can ship on a different timeline (and sometimes a different severity) than the upstream project.

Red HatImportant

Red Hat Product Security is aware of this issue. Updates will be released as they become available. Note that PIPE_BUF_FLAG_CAN_MERGE flag attack vector is not available in Red Hat Enterprise Linux 8 and thus the currently known exploits leveraging this flag do not work. The underlying issue (lack of proper…

ProductFixed inAdvisory
Red Hat Enterprise Linux 8kernel-rt-0:4.18.0-348.20.1.rt7.150.el8_5RHSA-2022:0819
Red Hat Enterprise Linux 8kernel-0:4.18.0-348.20.1.el8_5RHSA-2022:0825
Red Hat Enterprise Linux 8.1 Update Services for SAP Solutionskernel-0:4.18.0-147.64.1.el8_1RHSA-2022:0823
Red Hat Enterprise Linux 8.2 Extended Update Supportkernel-rt-0:4.18.0-193.79.1.rt13.129.el8_2RHSA-2022:0821
Red Hat Enterprise Linux 8.2 Extended Update Supportkernel-0:4.18.0-193.79.1.el8_2RHSA-2022:0820
Red Hat Enterprise Linux 8.4 Extended Update Supportkernel-rt-0:4.18.0-305.40.2.rt7.113.el8_4RHSA-2022:0822
Red Hat Enterprise Linux 8.4 Extended Update Supportkernel-0:4.18.0-305.40.2.el8_4RHSA-2022:0831
Red Hat Virtualization 4 for Red Hat Enterprise Linux 8redhat-virtualization-host-0:4.4.10-202203101736_8.5RHSA-2022:0841
UbuntuHIGH
USN-5317-1UbuntuUSN-5362-1Ubuntu

Frequently Asked Questions

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.
O3 Security · Impact-Aware SCA

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Actively Exploited: CVE-2022-0847: ovirt-engine (High 7.8)