Evidence dossier

CVE-2022-0847

CVE-2022-0847

76.9–93.4Priority evidence range

As known Jul 19, 2026, 5:00 AM UTCgen-56ccdaf9

Normalized restatement

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.

State: PUBLISHED
Published: Mar 7, 2022
Updated: Oct 21, 2025
Evidence coverage: 85%

CISA KEVCatalog member

Apply updates per vendor instructions.

FIRST EPSS89.06%

2026-07-18 · v2026.06.15 · percentile 99.8%

Source stateNo scored conflict

Distinct CVSS assessments remain side by side; none are averaged.

Source comparison

Who said what

CISA-ADPindependent enrichment

container

CISA ADP Vulnrichment

Jul 19, 2026Original evidence ↗

CVEderivative copy

container

CVE Program Container

Jul 19, 2026Original evidence ↗

redhatoriginal assertion

container

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.

Jul 19, 2026Original evidence ↗

CISA KEVoriginal assertion

observed_exploitation

Linux Kernel Privilege Escalation Vulnerability

Jul 19, 2026Original evidence ↗

FIRST EPSSoriginal assertion

model_probability

Probability 0.890630000000; percentile 0.997650000000

Jul 19, 2026Original evidence ↗

Applicability

Cited product scope

Trace impact →

n/akernel

[{"status": "affected", "version": "Linux Kernel 5.17 rc6"}]unknown

Unknown vendorUnknown product

cpe:2.3:a:ovirt:ovirt-engine:4.4.10.2:*:*:*:*:*:*:*supported

Unknown vendorUnknown product

cpe:2.3:a:redhat:codeready_linux_builder:-:*:*:*:*:*:*:*supported

Unknown vendorUnknown product

cpe:2.3:a:redhat:virtualization_host:4.0:*:*:*:*:*:*:*supported

Unknown vendorUnknown product

cpe:2.3:h:netapp:h300e:-:*:*:*:*:*:*:*constrained

Unknown vendorUnknown product

cpe:2.3:h:netapp:h300s:-:*:*:*:*:*:*:*constrained

Unknown vendorUnknown product

cpe:2.3:h:netapp:h410c:-:*:*:*:*:*:*:*constrained

Unknown vendorUnknown product

cpe:2.3:h:netapp:h410s:-:*:*:*:*:*:*:*constrained

Unknown vendorUnknown product

cpe:2.3:h:netapp:h500e:-:*:*:*:*:*:*:*constrained

Unknown vendorUnknown product

cpe:2.3:h:netapp:h500s:-:*:*:*:*:*:*:*constrained

Unknown vendorUnknown product

cpe:2.3:h:netapp:h700e:-:*:*:*:*:*:*:*constrained

Unknown vendorUnknown product

cpe:2.3:h:netapp:h700s:-:*:*:*:*:*:*:*constrained

Unknown vendorUnknown product

cpe:2.3:h:siemens:scalance_lpe9403:-:*:*:*:*:*:*:*constrained

Unknown vendorUnknown product

cpe:2.3:h:sonicwall:sma1000:-:*:*:*:*:*:*:*constrained

Unknown vendorUnknown product

cpe:2.3:o:fedoraproject:fedora:35:*:*:*:*:*:*:*supported

Unknown vendorUnknown product

cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*; start including 5.8; end excluding 5.10.102supported

Unknown vendorUnknown product

cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*; start including 5.15; end excluding 5.15.25supported

Unknown vendorUnknown product

cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*; start including 5.16; end excluding 5.16.11supported

Unknown vendorUnknown product

cpe:2.3:o:netapp:h300e_firmware:-:*:*:*:*:*:*:*supported

Unknown vendorUnknown product

cpe:2.3:o:netapp:h300s_firmware:-:*:*:*:*:*:*:*supported

Unknown vendorUnknown product

cpe:2.3:o:netapp:h410c_firmware:-:*:*:*:*:*:*:*supported

Unknown vendorUnknown product

cpe:2.3:o:netapp:h410s_firmware:-:*:*:*:*:*:*:*supported

Unknown vendorUnknown product

cpe:2.3:o:netapp:h500e_firmware:-:*:*:*:*:*:*:*supported

Unknown vendorUnknown product

cpe:2.3:o:netapp:h500s_firmware:-:*:*:*:*:*:*:*supported

Unknown vendorUnknown product

cpe:2.3:o:netapp:h700e_firmware:-:*:*:*:*:*:*:*supported

Unknown vendorUnknown product

cpe:2.3:o:netapp:h700s_firmware:-:*:*:*:*:*:*:*supported

Unknown vendorUnknown product

cpe:2.3:o:redhat:enterprise_linux:8.0:*:*:*:*:*:*:*supported

Unknown vendorUnknown product

cpe:2.3:o:redhat:enterprise_linux:8.0:*:*:*:*:*:*:*constrained

Unknown vendorUnknown product

cpe:2.3:o:redhat:enterprise_linux:8.0:*:*:*:*:*:*:*constrained

Unknown vendorUnknown product

cpe:2.3:o:redhat:enterprise_linux_eus:8.2:*:*:*:*:*:*:*supported

Unknown vendorUnknown product

cpe:2.3:o:redhat:enterprise_linux_eus:8.2:*:*:*:*:*:*:*constrained

Unknown vendorUnknown product

cpe:2.3:o:redhat:enterprise_linux_eus:8.4:*:*:*:*:*:*:*supported

Unknown vendorUnknown product

cpe:2.3:o:redhat:enterprise_linux_eus:8.4:*:*:*:*:*:*:*constrained

Unknown vendorUnknown product

cpe:2.3:o:redhat:enterprise_linux_for_ibm_z_systems:8.0:*:*:*:*:*:*:*supported

Unknown vendorUnknown product

cpe:2.3:o:redhat:enterprise_linux_for_ibm_z_systems_eus:8.2:*:*:*:*:*:*:*supported

Unknown vendorUnknown product

cpe:2.3:o:redhat:enterprise_linux_for_ibm_z_systems_eus:8.4:*:*:*:*:*:*:*supported

Unknown vendorUnknown product

cpe:2.3:o:redhat:enterprise_linux_for_power_little_endian:8.0:*:*:*:*:*:*:*supported

Unknown vendorUnknown product

cpe:2.3:o:redhat:enterprise_linux_for_power_little_endian:8.0:*:*:*:*:*:*:*constrained

Unknown vendorUnknown product

cpe:2.3:o:redhat:enterprise_linux_for_power_little_endian_eus:8.2:*:*:*:*:*:*:*supported

Unknown vendorUnknown product

cpe:2.3:o:redhat:enterprise_linux_for_power_little_endian_eus:8.2:*:*:*:*:*:*:*constrained

Unknown vendorUnknown product

cpe:2.3:o:redhat:enterprise_linux_for_power_little_endian_eus:8.4:*:*:*:*:*:*:*supported

Unknown vendorUnknown product

cpe:2.3:o:redhat:enterprise_linux_for_power_little_endian_eus:8.4:*:*:*:*:*:*:*constrained

Unknown vendorUnknown product

cpe:2.3:o:redhat:enterprise_linux_for_real_time:8:*:*:*:*:*:*:*supported

Unknown vendorUnknown product

cpe:2.3:o:redhat:enterprise_linux_for_real_time_for_nfv:8:*:*:*:*:*:*:*supported

Unknown vendorUnknown product

cpe:2.3:o:redhat:enterprise_linux_for_real_time_for_nfv_tus:8.2:*:*:*:*:*:*:*supported

Unknown vendorUnknown product

cpe:2.3:o:redhat:enterprise_linux_for_real_time_for_nfv_tus:8.4:*:*:*:*:*:*:*supported

Unknown vendorUnknown product

cpe:2.3:o:redhat:enterprise_linux_for_real_time_tus:8.2:*:*:*:*:*:*:*supported

Unknown vendorUnknown product

cpe:2.3:o:redhat:enterprise_linux_for_real_time_tus:8.4:*:*:*:*:*:*:*supported

Unknown vendorUnknown product

cpe:2.3:o:redhat:enterprise_linux_server_aus:8.2:*:*:*:*:*:*:*supported

Unknown vendorUnknown product

cpe:2.3:o:redhat:enterprise_linux_server_aus:8.4:*:*:*:*:*:*:*supported

Unknown vendorUnknown product

cpe:2.3:o:redhat:enterprise_linux_server_for_power_little_endian_update_services_for_sap_solutions:8.1:*:*:*:*:*:*:*supported

Unknown vendorUnknown product

cpe:2.3:o:redhat:enterprise_linux_server_for_power_little_endian_update_services_for_sap_solutions:8.2:*:*:*:*:*:*:*supported

Unknown vendorUnknown product

cpe:2.3:o:redhat:enterprise_linux_server_for_power_little_endian_update_services_for_sap_solutions:8.4:*:*:*:*:*:*:*supported

Unknown vendorUnknown product

cpe:2.3:o:redhat:enterprise_linux_server_tus:8.2:*:*:*:*:*:*:*supported

Unknown vendorUnknown product

cpe:2.3:o:redhat:enterprise_linux_server_tus:8.4:*:*:*:*:*:*:*supported

Unknown vendorUnknown product

cpe:2.3:o:redhat:enterprise_linux_server_update_services_for_sap_solutions:8.1:*:*:*:*:*:*:*supported

Unknown vendorUnknown product

cpe:2.3:o:redhat:enterprise_linux_server_update_services_for_sap_solutions:8.2:*:*:*:*:*:*:*supported

Unknown vendorUnknown product

cpe:2.3:o:redhat:enterprise_linux_server_update_services_for_sap_solutions:8.4:*:*:*:*:*:*:*supported

Unknown vendorUnknown product

cpe:2.3:o:siemens:scalance_lpe9403_firmware:*:*:*:*:*:*:*:*; end excluding 2.0supported

Unknown vendorUnknown product

cpe:2.3:o:sonicwall:sma1000_firmware:*:*:*:*:*:*:*:*; end including 12.4.2-02044supported

Assessments

CVSS by origin

7.8

nvd@nist.govCVSS 3.1 · role PrimaryCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

7.2

nvd@nist.govCVSS 2.0 · role PrimaryAV:L/AC:L/Au:N/C:C/I:C/A:C

7.8

134c704f-9b21-4f2e-91b3-4a467353bcc0CVSS 3.1 · role SecondaryCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

7.8

CISA-ADPCVSS 3.1 · role unknownCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Limitations and unknowns

KEV membership is authoritative for the catalog, not proof of exposure in any environment.
EPSS is a dated model probability and not an individual-environment prediction.
Affected or fixed status applies only to the exact cited product and version scope; unresolved scope remains unknown.
NVD-carried upstream facts remain derivative and are not independent corroboration.
Only NVD metrics validated under the generation-bound calculator are Public Priority eligible; direct CVE record metrics remain display-only.
NVD CVSS source eligibility is closed: NVD-authored, exact record-source, or registered same-CVE container origin; unmapped sources remain display-only.
Factor D is unknown in Public Core because no accepted canonical mapping-obligation ledger is present.
Core replay supports the active and immediately prior generation; retrospective valid-at replay is deferred.