01 Record

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.

UnratedPUBLISHEDCNA: mitre

CNA base scoreUnratedNo CNA CVSS vector

View raw JSON

02 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.

03 Exploitation and scoring

Exploitation: Not assessed. CISA has not published an exploitation assessment for this record, and it is not in the KEV catalog. That is an absence of assessment, not a finding of no risk.
SSVC decision: Not assessed by CISA
EPSS probability: 0.57% probability of exploitation activity in the next 30 days.
EPSS percentile: Equal to or higher than the score of 47.1% of scored records. A rank, not a probability.
NVD base score: 7.8 (CVSS v3.x), scored by the NVD independently of the CNA.
NVD CVSS vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
NVD analysis status: Modified. NVD last modified this record on 2026-06-17.
Red Hat severity: Important. Red Hat's rating for its own products, not a CVSS rating.

Exploit-prediction scores from FIRST. Independent scoring and analysis status from the NVD. Vendor severity from Red Hat. Exploitation assessment and catalog membership from CISA.

04 Metadata

Published

2021-07-26 21:35Z5 YR AGO

Last updated

2024-08-04 01:23Z2 YR AGO

Reserved

2021-07-26

Assigning CNA

mitre

Record state

PUBLISHED

Severity

Not rated by the issuing CNA

CNA CVSS vector

Not published by the issuing CNA

Weaknesses

CWE-787Out-of-bounds WriteBase
CWE-1284Improper Validation of Specified Quantity in InputBase

Data version

5.1

Document digest

58c71073c793e06a87be8c7fefae58db5ef01d2ba4b2da20484a4dd1ca007839

05 Affected products

VendorProductVersionsPlatforms

fedoraprojectfedoraNot specified—

linuxlinux_kernelNot specified—

redhatenterprise_linuxNot specified—

redhatrhel_ausNot specified—

redhatrhel_e4sNot specified—

redhatrhel_eusNot specified—

redhatrhel_tusNot specified—

06 References

lore.kernel.orghttps://lore.kernel.org/linuxppc-dev/87im0x1lqi.fsf%40mpe.ellerman.id.au/T/#ux_refsource_MISC
git.kernel.orghttps://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=f62f3c20647ebd5fb6ecb8f0b477b9281c44c10ax_refsource_MISC
www.openwall.com[oss-security] 20210727 Re: Linux kernel: powerpc: KVM guest to host memory corruptionhttp://www.openwall.com/lists/oss-security/2021/07/27/2mailing-listx_refsource_MLIST
lists.fedoraproject.orgFEDORA-2021-817b3d47d2https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/Z2YZ2DNURMYYVDT2NYAFDESJC35KCUDS/vendor-advisoryx_refsource_FEDORA
lists.fedoraproject.orgFEDORA-2021-12618d9b08https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/WDFA7DSQIPM7XPNXJBXFWXHJFVUBCAG6/vendor-advisoryx_refsource_FEDORA
security.netapp.comhttps://security.netapp.com/advisory/ntap-20210917-0005/x_refsource_CONFIRM
www.debian.orgDSA-4978https://www.debian.org/security/2021/dsa-4978vendor-advisoryx_refsource_DEBIAN

07 Fixed in

AlmaLinux 8

kernel-tools-libs-devel
Fixed in 4.18.0-305.17.1.el8_4

CloudLinux 8

kernel-tools-libs-devel
Fixed in 4.18.0-305.17.1.el8_4

Derived from AlmaLinux 8. Partial coverage: only packages taken from AlmaLinux 8 are listed.

Debian 12

linux
Fixed in 5.14.6-1

Source: Debian Security Tracker, the Debian security team. Received through OSV.dev. Reformatted by exploit.cc.

Debian 13

linux
Fixed in 5.14.6-1

Source: Debian Security Tracker, the Debian security team. Received through OSV.dev. Reformatted by exploit.cc.

Debian 14

linux
Fixed in 5.14.6-1

Source: Debian Security Tracker, the Debian security team. Received through OSV.dev. Reformatted by exploit.cc.