CVE-2021-37576

Name: CVE-2021-37576
Creator: NVD / NIST
Published: 2021-07-26T22:15:08.423+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 7.8/10EPSS 0.57%

Last modified Jun 17, 2026

CVE-2021-37576 is a high-severity vulnerability rated 7.8/10 on the CVSS scale. arch/powerpc/kvm/book3s_rtas.c in the Linux kernel through 5.13.5 on the powerpc platform allows KVM guest OS users to cause host OS memory corruption via rtas_args.nargs, aka CID-f62f3c20647e.. EPSS estimates a 0.57% chance of exploitation in the next 30 days.

Description

arch/powerpc/kvm/book3s_rtas.c in the Linux kernel through 5.13.5 on the powerpc platform allows KVM guest OS users to cause host OS memory corruption via rtas_args.nargs, aka CID-f62f3c20647e.

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

0.57%

43.0th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-787

Affected Software

Vendor	Product	Versions
Linux	Linux Kernel	>= 3.10, < 4.4.277
Linux	Linux Kernel	>= 4.5, < 4.9.277
Linux	Linux Kernel	>= 4.10, < 4.14.241
Linux	Linux Kernel	>= 4.15, < 4.19.199
Linux	Linux Kernel	>= 4.20, < 5.4.136
Linux	Linux Kernel	>= 5.5, < 5.10.54
Linux	Linux Kernel	>= 5.11, < 5.13.6
Fedoraproject	Fedora	33
Fedoraproject	Fedora	34

References

http://www.openwall.com/lists/oss-security/2021/07/27/2Exploit, Mailing List, Patch, Third Party Advisory
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=f62f3c20647ebd5fb6ecb8f0b477b9281c44c10aPatch, Vendor Advisory
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/WDFA7DSQIPM7XPNXJBXFWXHJFVUBCAG6/
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/Z2YZ2DNURMYYVDT2NYAFDESJC35KCUDS/
https://lore.kernel.org/linuxppc-dev/87im0x1lqi.fsf%40mpe.ellerman.id.au/T/#u
https://security.netapp.com/advisory/ntap-20210917-0005/Third Party Advisory
https://www.debian.org/security/2021/dsa-4978Third Party Advisory
http://www.openwall.com/lists/oss-security/2021/07/27/2Exploit, Mailing List, Patch, Third Party Advisory
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=f62f3c20647ebd5fb6ecb8f0b477b9281c44c10aPatch, Vendor Advisory
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/WDFA7DSQIPM7XPNXJBXFWXHJFVUBCAG6/
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/Z2YZ2DNURMYYVDT2NYAFDESJC35KCUDS/
https://lore.kernel.org/linuxppc-dev/87im0x1lqi.fsf%40mpe.ellerman.id.au/T/#u
https://security.netapp.com/advisory/ntap-20210917-0005/Third Party Advisory
https://www.debian.org/security/2021/dsa-4978Third Party Advisory

Timeline

Published: Jul 26, 2021
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2021-37576?

arch/powerpc/kvm/book3s_rtas.c in the Linux kernel through 5.13.5 on the powerpc platform allows KVM guest OS users to cause host OS memory corruption via rtas_args.nargs, aka CID-f62f3c20647e.

How severe is CVE-2021-37576?

CVE-2021-37576 has a CVSS score of 7.8/10 (HIGH severity). The EPSS model estimates a 0.57% probability of exploitation in the next 30 days.

How do I fix CVE-2021-37576?

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-2021-37576?

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

Scan your code now

Source: NVD / NIST