CVE-2022-0847
HighExploitedPublic exploitAn 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.
Published Jun 20, 2022 · Updated Oct 14, 2026 · Also known as A-220741611, ASB-A-220741611, DEBIAN-CVE-2022-0847, Dirty Pipe, DirtyPipe, UBUNTU-CVE-2022-0847
Key Facts
Patch immediately- CVE-2022-0847 is a high-severity vulnerability (CVSS 7.8 v3.1) affecting Ovirt-Engine, Codeready Linux Builder (Redhat), Virtualization Host (Redhat) and 22 more products.
- It is exploited in the wild, listed in CISA KEV, Industry KEV feed, CIRCL KEV, ENISA EUVD since Apr 25, 2022 and is known to be used in ransomware campaigns. Public exploit code is available.
- EPSS estimates a 93% probability of exploitation in the next 30 days.
- Fixed versions are available, including :linux_kernel: :2022-05-05, bpftool 4.18.0-348.20.1.el8_5, bpftool 5.10.46-2.ph4.
- Brandefense priority: patch immediately, because it is listed as exploited in the wild.
CVSS v3.1
7.8
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
EPSS (30-day exploit likelihood)
93%
Higher than 99.8% of all scored CVEs
Exploited in the wild
Yes
4 catalog listings, used by ransomware
Public exploit code
Available
Proof-of-concept or weaponized module
Get the full CVE-2022-0847 brief as a PDF
Every affected product and fixed release, exploitation status and a first 24 hours response checklist, emailed within minutes.
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.
Known-Exploited Catalog Listings
| Catalog | Added | Remediation due | Ransomware use |
|---|---|---|---|
| CISA KEV | Apr 25, 2022 | May 16, 2022 | Not reported |
| Industry KEV feed | Apr 25, 2022 | May 16, 2022 | Known |
| CIRCL KEV | Apr 25, 2022 | May 16, 2022 | Not reported |
| ENISA EUVD | Apr 25, 2022 | n/a | Not reported |
Required action: Apply updates per vendor instructions.
Affected Products
895 affected entries in total| Product | Affected versions | Fixed in |
|---|---|---|
| Ovirt-EngineOvirt | 4.4.10.2 | n/a |
| Codeready Linux BuilderRedhat | See advisory | n/a |
| Virtualization HostRedhat | 4.0 | n/a |
| H300eNetapp | See advisory | n/a |
| H300sNetapp | See advisory | n/a |
Patched Releases
:linux_kernel:
:2022-05-05
bpftool
4.18.0-348.20.1.el8_5, 5.10.46-2.ph4, 5.15.25-14.106.amzn2022, 5.15.73-45.135.amzn2022, 6.1.10-15.42.amzn2023
cluster-md-kmp-64kb
5.3.18-150300.59.54.1
cluster-md-kmp-azure
5.3.18-150300.38.47.1
cluster-md-kmp-default
4.12.14-122.113.1, 4.12.14-150.86.1, 4.12.14-197.108.1, 4.12.14-95.93.1, 5.3.18-150300.59.54.1, 5.3.18-24.107.1
cluster-md-kmp-preempt
5.3.18-150300.59.54.1
cluster-md-kmp-rt
4.12.14-10.81.1, 5.3.18-150300.79.1, 5.3.18-76.1
dlm-kmp-64kb
5.3.18-150300.59.54.1
dlm-kmp-azure
5.3.18-150300.38.47.1
dlm-kmp-default
4.12.14-122.113.1, 4.12.14-150.86.1, 4.12.14-197.108.1, 4.12.14-95.93.1, 5.3.18-150300.59.54.1, 5.3.18-24.107.1
dlm-kmp-preempt
5.3.18-150300.59.54.1
dlm-kmp-rt
4.12.14-10.81.1, 5.3.18-150300.79.1, 5.3.18-76.1
dtb-al
5.3.18-150300.59.54.1
dtb-allwinner
5.3.18-150300.59.54.1
dtb-altera
5.3.18-150300.59.54.1
dtb-amd
5.3.18-150300.59.54.1
dtb-amlogic
5.3.18-150300.59.54.1
dtb-apm
5.3.18-150300.59.54.1
dtb-arm
5.3.18-150300.59.54.1
dtb-broadcom
5.3.18-150300.59.54.1
dtb-cavium
5.3.18-150300.59.54.1
dtb-exynos
5.3.18-150300.59.54.1
dtb-freescale
5.3.18-150300.59.54.1
dtb-hisilicon
5.3.18-150300.59.54.1
dtb-lg
5.3.18-150300.59.54.1
Timeline
Added to CISA KEV
Apr 25, 2022
Added to Industry KEV feed
Apr 25, 2022
Added to CIRCL KEV
Apr 25, 2022
Added to ENISA EUVD
Apr 25, 2022
Publicly disclosed
Jun 20, 2022
Last updated
Oct 14, 2026
Weakness Type
- CWE-665 Improper Initialization
- CWE-908 Use of Uninitialized Resource
References
- advisoryhttp://access.redhat.com/errata/RHSA-2022:0824
- advisoryhttp://blog.talosintelligence.com/2022/03/microsoft-patch-tuesday-for-march-2022.html
- advisoryhttp://bugzilla.redhat.com/show_bug.cgi?id=2044561
- advisoryhttp://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-35550
- advisoryhttp://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2022-23773
FAQ
Common 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.
Affected: Ovirt-Engine versions 4.4.10.2; Codeready Linux Builder (Redhat); Virtualization Host (Redhat) versions 4.0, among others. The full list is in the CVE brief.
It is exploited in the wild, listed in CISA KEV, Industry KEV feed, CIRCL KEV, ENISA EUVD since Apr 25, 2022 and is known to be used in ransomware campaigns.
Yes. It was added on Apr 25, 2022 with a federal remediation due date of May 16, 2022.
Public exploit code is available.
Fixed versions are available, including :linux_kernel: :2022-05-05, bpftool 4.18.0-348.20.1.el8_5, bpftool 5.10.46-2.ph4.
Brandefense priority: patch immediately, because it is listed as exploited in the wild.
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