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CVE-2022-0847

HIGHCVSS 7.8/10Actively ExploitedEPSS 89.06%

Last modified

CVE-2022-0847 is a high-severity vulnerability rated 7.8/10 on the CVSS scale. 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.. CISA has confirmed active exploitation in the wild. EPSS estimates a 89.06% chance of exploitation in the next 30 days.

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.

Metrics

CVSS 3.1
7.8/10

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

EPSS Probability
89.06%

99.8th percentile

Probability of exploitation in the next 30 days. Learn more

Exploitation Status

This vulnerability is listed in CISA’s Known Exploited Vulnerabilities catalog, confirming active exploitation in the wild. Federal agencies must remediate by .

Weakness Enumeration

Affected Software

VendorProductVersions
LinuxLinux Kernel>= 5.8, < 5.10.102
LinuxLinux Kernel>= 5.15, < 5.15.25
LinuxLinux Kernel>= 5.16, < 5.16.11
FedoraprojectFedora35
RedhatEnterprise Linux8.0
RedhatEnterprise Linux Eus8.2
RedhatEnterprise Linux Eus8.4
RedhatEnterprise Linux For Ibm Z Systems8.0
RedhatEnterprise Linux For Ibm Z Systems Eus8.2
RedhatEnterprise Linux For Ibm Z Systems Eus8.4
RedhatEnterprise Linux For Power Little Endian8.0
RedhatEnterprise Linux For Power Little Endian Eus8.2
RedhatEnterprise Linux For Power Little Endian Eus8.4
RedhatEnterprise Linux For Real Time8
RedhatEnterprise Linux For Real Time For Nfv8
RedhatEnterprise Linux For Real Time For Nfv Tus8.2
RedhatEnterprise Linux For Real Time For Nfv Tus8.4
RedhatEnterprise Linux For Real Time Tus8.2
RedhatEnterprise Linux For Real Time Tus8.4
RedhatEnterprise Linux Server Aus8.2
RedhatEnterprise Linux Server Aus8.4
RedhatEnterprise Linux Server For Power Little Endian Update Services For Sap Solutions8.1
RedhatEnterprise Linux Server For Power Little Endian Update Services For Sap Solutions8.2
RedhatEnterprise Linux Server For Power Little Endian Update Services For Sap Solutions8.4
RedhatEnterprise Linux Server Tus8.2
RedhatEnterprise Linux Server Tus8.4
RedhatEnterprise Linux Server Update Services For Sap Solutions8.1
RedhatEnterprise Linux Server Update Services For Sap Solutions8.2
RedhatEnterprise Linux Server Update Services For Sap Solutions8.4
RedhatCodeready Linux BuilderAll versions
RedhatVirtualization Host4.0
OvirtOvirt-Engine4.4.10.2
NetappH300s FirmwareAll versions
NetappH500s FirmwareAll versions
NetappH700s FirmwareAll versions
NetappH300e FirmwareAll versions
NetappH500e FirmwareAll versions
NetappH700e FirmwareAll versions
NetappH410s FirmwareAll versions
NetappH410c FirmwareAll versions
SiemensScalance Lpe9403 Firmware< 2.0
SonicwallSma1000 Firmware<= 12.4.2-02044

References

Timeline

Published
Last Modified
Status
Analyzed

Frequently Asked Questions

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.
How severe is CVE-2022-0847?
CVE-2022-0847 has a CVSS score of 7.8/10 (HIGH severity). The EPSS model estimates a 89.06% probability of exploitation in the next 30 days. This vulnerability is listed in CISA's Known Exploited Vulnerabilities catalog.
How do I fix CVE-2022-0847?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2022-0847?

Run a free Strix scan to check your systems for this vulnerability.

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Source: NVD / NIST