CVE-2022-0847
Linux Kernel Privilege Escalation Vulnerability
Does this matter?
Known to be exploited in the wild (CISA KEV, CISA remediation deadline 16 May 2022). Treat as an emergency change: patch or isolate now, then hunt for prior compromise.
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.
- CVSS 3.1
- 7.8 HIGHCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
- EPSS
- 92.80% probability · 100th percentile
- Public exploits
- 1 in Exploit-DB · first 8 March 2022
- CISA KEV
- Listed 25 April 2022 · due 16 May 2022
- Weakness
- CWE-665
- Affected
- linux/linux kernel · fedoraproject/fedora · redhat/enterprise linux · redhat/enterprise linux eus · redhat/enterprise linux for ibm z systems · redhat/enterprise linux for ibm z systems eus · redhat/enterprise linux for power little endian · redhat/enterprise linux for power little endian eus · redhat/enterprise linux for real time · redhat/enterprise linux for real time for nfv · redhat/enterprise linux for real time for nfv tus · redhat/enterprise linux for real time tus · redhat/enterprise linux server aus · redhat/enterprise linux server for power little endian update services for sap solutions · redhat/enterprise linux server tus · redhat/enterprise linux server update services for sap solutions · redhat/codeready linux builder · redhat/virtualization host · ovirt/ovirt-engine · netapp/h300s firmware · +9 more
- Source
- secalert@redhat.com
EPSS moved from 92.8% on 24 September 2026 to 92.8% on 30 October 2026. The dashed line is the ten per cent mark our analysts treat as “patch before the next change window”.
CISA notes
Apply updates per vendor instructions. https://nvd.nist.gov/vuln/detail/CVE-2022-0847
Public exploits (1)
Entries in Exploit-DB that cite this CVE. Links go to the Exploit-DB page and to the file in the public repository; nothing is hosted here. A verified tick means the Exploit-DB team confirmed the exploit works against the stated version.
References
- http://packetstormsecurity.com/files/166229/Dirty-Pipe-Linux-Privilege-Escalation.htmlExploit, Third Party Advisory, VDB Entry
- http://packetstormsecurity.com/files/166230/Dirty-Pipe-SUID-Binary-Hijack-Privilege-Escalation.htmlExploit, Third Party Advisory, VDB Entry
- http://packetstormsecurity.com/files/166258/Dirty-Pipe-Local-Privilege-Escalation.htmlExploit, Third Party Advisory, VDB Entry
- http://packetstormsecurity.com/files/176534/Linux-4.20-KTLS-Read-Only-Write.htmlThird Party Advisory, VDB Entry
- https://bugzilla.redhat.com/show_bug.cgi?id=2060795Issue Tracking, Patch, Third Party Advisory
- https://cert-portal.siemens.com/productcert/pdf/ssa-222547.pdfThird Party Advisory
- https://dirtypipe.cm4all.com/Exploit, Third Party Advisory
- https://psirt.global.sonicwall.com/vuln-detail/SNWLID-2022-0015Third Party Advisory
- https://security.netapp.com/advisory/ntap-20220325-0005/Third Party Advisory
- https://www.suse.com/support/kb/doc/?id=000020603Third Party Advisory
- http://packetstormsecurity.com/files/166229/Dirty-Pipe-Linux-Privilege-Escalation.htmlExploit, Third Party Advisory, VDB Entry
- http://packetstormsecurity.com/files/166230/Dirty-Pipe-SUID-Binary-Hijack-Privilege-Escalation.htmlExploit, Third Party Advisory, VDB Entry
- http://packetstormsecurity.com/files/166258/Dirty-Pipe-Local-Privilege-Escalation.htmlExploit, Third Party Advisory, VDB Entry
- http://packetstormsecurity.com/files/176534/Linux-4.20-KTLS-Read-Only-Write.htmlThird Party Advisory, VDB Entry
- https://bugzilla.redhat.com/show_bug.cgi?id=2060795Issue Tracking, Patch, Third Party Advisory
- https://cert-portal.siemens.com/productcert/pdf/ssa-222547.pdfThird Party Advisory
- https://dirtypipe.cm4all.com/Exploit, Third Party Advisory
- https://psirt.global.sonicwall.com/vuln-detail/SNWLID-2022-0015Third Party Advisory
- https://security.netapp.com/advisory/ntap-20220325-0005/Third Party Advisory
- https://www.suse.com/support/kb/doc/?id=000020603Third Party Advisory
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2022-0847US Government Resource
Source: NVD record, EPSS from FIRST.org, KEV from CISA, exploits from Exploit-DB. Refreshed daily. Download this record as JSON.