# CVE-2022-0847 — kernel

**CISA KEV**

> As of 2025-10-21, CVE-2022-0847 is a HIGH-severity vulnerability in kernel, CVSS v3.1 7.8, EPSS 92.7% (99.8th percentile). It is listed in the CISA Known Exploited Vulnerabilities catalog (added 2022-04-25), with a US federal remediation deadline of 2022-05-16. Threadlinqs Intelligence links 2 tracked threat campaigns to CVE-2022-0847, most recently “Chinese-Speaking 'Kapibala' Actor (Red Heron-Linked) Chains WordPress wp2shell, Zyxel GS1900, and Ubiquiti UniFi OS Flaws to Steal Government Data”.

**Last updated:** 2025-10-21

## 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.

The record classifies CVE-2022-0847 under weakness class [CWE-665](https://cwe.mitre.org/data/definitions/665.html). Its CVSS v3 base vector states that the flaw requires local access to the host, needs low-privilege credentials, needs no user interaction, and has high impact on confidentiality, integrity, availability. 1 affected-product entry is recorded, across 1 vendor, listed below. The identifier was first published 1673 days ago.

## Severity and exploitation probability

- **CVSS v3.1 base score:** 7.8 — HIGH (`CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H`)
- **EPSS (FIRST):** 92.7% probability of exploitation in the next 30 days, higher than 99.8% of all scored CVEs
- **CISA KEV:** Listed since 2022-04-25, federal remediation deadline 2022-05-16
- **Threadlinqs priority:** 9/10 — CISA KEV-listed, which Threadlinqs floors at 9
- **Published:** 2022-03-07, last modified 2025-10-21

## Is CVE-2022-0847 being exploited?

CISA added CVE-2022-0847 to the Known Exploited Vulnerabilities catalog on 2022-04-25, which means the agency holds evidence of exploitation in the wild; US federal civilian agencies had to remediate it by 2022-05-16 under BOD 22-01. Weaponised exploit code for CVE-2022-0847 is publicly available. 11 public proof-of-concept repositories are tracked for this identifier. It currently carries a trending score of 43 in the Threadlinqs vulnerability feed.

- [Arinerron/CVE-2022-0847-DirtyPipe-Exploit](https://github.com/Arinerron/CVE-2022-0847-DirtyPipe-Exploit) (github)
- [AlexisAhmed/CVE-2022-0847-DirtyPipe-Exploits](https://github.com/AlexisAhmed/CVE-2022-0847-DirtyPipe-Exploits) (github)
- [r1is/CVE-2022-0847](https://github.com/r1is/CVE-2022-0847) (github)
- [Al1ex/CVE-2022-0847](https://github.com/Al1ex/CVE-2022-0847) (github)
- [DataDog/dirtypipe-container-breakout-poc](https://github.com/DataDog/dirtypipe-container-breakout-poc) (github)
- [basharkey/CVE-2022-0847-dirty-pipe-checker](https://github.com/basharkey/CVE-2022-0847-dirty-pipe-checker) (github)
- [ZZ-SOCMAP/CVE-2022-0847](https://github.com/ZZ-SOCMAP/CVE-2022-0847) (github)
- [bbaranoff/CVE-2022-0847](https://github.com/bbaranoff/CVE-2022-0847) (github)

## Affected products and versions

- **(vendor unspecified)**: kernel

## How to fix CVE-2022-0847

The record marks a vendor fix as available for CVE-2022-0847. Patch reference: [https://bugzilla.redhat.com/show_bug.cgi?id=2060795](https://bugzilla.redhat.com/show_bug.cgi?id=2060795). Because CVE-2022-0847 is KEV-listed, US federal civilian agencies were required to apply the vendor fix, or stop using the product, by 2022-05-16. Apply the vendor fix referenced above to every affected product listed in this record, then confirm the running version against the vendor advisory.

## Threat activity tracking CVE-2022-0847

2 tracked threats in the Threadlinqs corpus reference CVE-2022-0847, either in the campaign’s CVE list or as an indicator on the campaign record.

- [Chinese-Speaking 'Kapibala' Actor (Red Heron-Linked) Chains WordPress wp2shell, Zyxel GS1900, and Ubiquiti UniFi OS Flaws to Steal Government Data](https://intel.threadlinqs.com/threat/TL-2026-2619) — CRITICAL · 2026-09-22
- [Chinese-speaking threat group UAT-10147 uses agentic AI to automate exploitation of internet-facing web servers](https://intel.threadlinqs.com/threat/TL-2026-2096) — HIGH · 2026-08-21

## Sources

Enriched from CVE.org, NVD, FIRST EPSS, CISA KEV, public proof-of-concept repositories. Last verified by Threadlinqs on 2026-09-29. This product uses the NVD API but is not endorsed or certified by the NVD.

**Other references**

- [bugzilla.redhat.com](https://bugzilla.redhat.com/show_bug.cgi?id=2060795)
- [dirtypipe.cm4all.com](https://dirtypipe.cm4all.com/)
- [packetstormsecurity.com](http://packetstormsecurity.com/files/166230/Dirty-Pipe-SUID-Binary-Hijack-Privilege-Escalation.html)
- [packetstormsecurity.com (Dirty Pipe Linux Privilege Escalation)](http://packetstormsecurity.com/files/166229/Dirty-Pipe-Linux-Privilege-Escalation.html)
- [packetstormsecurity.com (Dirty Pipe Local Privilege Escalation)](http://packetstormsecurity.com/files/166258/Dirty-Pipe-Local-Privilege-Escalation.html)

_Showing 5 of 10 recorded references._

Canonical: https://intel.threadlinqs.com/cve/CVE-2022-0847
Full detection coverage and IOCs for threats exploiting CVE-2022-0847 via the Threadlinqs MCP server (Purple tier): https://intel.threadlinqs.com/mcp