CVE-2021-37576

HIGHNVD 7.87.8—

7.8

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.

CVSS v3: 7.8
EG Score: 7.8(medium)
EPSS: 4.2%
KEV: Not listed

Published

July 26, 2021

Last Modified

November 21, 2024

References (14)

cve@mitrehttp://www.openwall.com/lists/oss-security/2021/07/27/2
cve@mitrehttps://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=f62f3c20647ebd5fb6ecb8f0b477b9281c44c10a
cve@mitrehttps://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/WDFA7DSQIPM7XPNXJBXFWXHJFVUBCAG6/
cve@mitrehttps://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/Z2YZ2DNURMYYVDT2NYAFDESJC35KCUDS/
cve@mitrehttps://lore.kernel.org/linuxppc-dev/87im0x1lqi.fsf%40mpe.ellerman.id.au/T/#u
cve@mitrehttps://security.netapp.com/advisory/ntap-20210917-0005/
cve@mitrehttps://www.debian.org/security/2021/dsa-4978
af854a3a-2127-422b-91ae-364da2661108http://www.openwall.com/lists/oss-security/2021/07/27/2
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=f62f3c20647ebd5fb6ecb8f0b477b9281c44c10a
af854a3a-2127-422b-91ae-364da2661108https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/WDFA7DSQIPM7XPNXJBXFWXHJFVUBCAG6/
af854a3a-2127-422b-91ae-364da2661108https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/Z2YZ2DNURMYYVDT2NYAFDESJC35KCUDS/
af854a3a-2127-422b-91ae-364da2661108https://lore.kernel.org/linuxppc-dev/87im0x1lqi.fsf%40mpe.ellerman.id.au/T/#u
af854a3a-2127-422b-91ae-364da2661108https://security.netapp.com/advisory/ntap-20210917-0005/
af854a3a-2127-422b-91ae-364da2661108https://www.debian.org/security/2021/dsa-4978

Patch Availability(13)

Vendor / Ecosystem	Fixed in / Patch	Released	Source
ubuntu	linux-image-lowlatency (5.4.0.88.92) @ focal	2026-05-26	ubuntu
ubuntu	linux-virtual-hwe-16.04-edge (4.15.0.159.152) @ xenial	2026-05-26	ubuntu
ubuntu	linux-image-lowlatency (5.11.0.37.39) @ hirsute	2026-05-26	ubuntu
ubuntu	linux-modules-5.11.0-1017-azure (5.11.0-1017.18) @ hirsute	2026-05-26	ubuntu
redhat	kpatch-patch	2021-10-26	redhat
redhat	kernel-0:3.10.0-1062.59.1.el7	2021-10-26	redhat
redhat	kernel-0:3.10.0-514.93.1.el7	2021-10-12	redhat
redhat	kernel-0:3.10.0-957.84.1.el7	2021-10-12	redhat
redhat	kernel-0:3.10.0-1160.45.1.el7	2021-10-12	redhat
redhat	kernel-0:3.10.0-693.94.1.el7	2021-10-05	redhat
redhat	kernel-0:4.18.0-147.54.2.el8_1	2021-09-07	redhat
redhat	kernel-0:4.18.0-193.65.2.el8_2	2021-09-07	redhat
redhat	kernel-0:4.18.0-305.17.1.el8_4	2021-09-07	redhat

Patches are aggregated from vendor advisories (Red Hat, Microsoft, Cisco, GitHub) and package ecosystems (OSV, GHSA). Multiple rows for the same upstream release have been deduplicated.

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

CWE-787Out-of-bounds Write

All Vendor Advisories

(19)

Every vendor that published an advisory referencing this CVE — pulled from our cve_vendor_advisories aggregation. Click any row for the vendor's original advisory page.

Data Freshness Timeline

(refreshed 12× in last 7d / 20× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

2026-06-08 14:15 UTCEPSS rescore
2026-06-08 14:15 UTCEPSS rescore
2026-06-07 15:23 UTCEPSS rescore
2026-06-07 15:23 UTCEPSS rescore
2026-06-06 13:46 UTCEPSS rescore
2026-06-06 13:46 UTCEPSS rescore
2026-06-06 13:46 UTCEPSS rescore
2026-06-05 22:45 UTCEPSS rescore
2026-06-05 06:09 UTCEPSS rescore
2026-06-05 06:09 UTCEPSS rescore
2026-06-04 13:10 UTCEPSS rescore
2026-06-04 13:10 UTCEPSS rescore
2026-06-02 20:11 UTCEPSS rescore
2026-06-02 20:11 UTCEPSS rescore
2026-06-01 13:50 UTCEPSS rescore
2026-06-01 13:50 UTCEPSS rescore
2026-05-31 22:29 UTCEPSS rescore
2026-05-31 22:29 UTCEPSS rescore
2026-05-31 00:15 UTCEPSS rescore
2026-05-31 00:15 UTCEPSS rescore

Frequently asked(5)

What is CVE-2021-37576?

CVE-2021-37576 is a high vulnerability published on July 26, 2021. arch/powerpc/kvm/book3srtas.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 rtasargs.nargs, aka CID-f62f3c20647e.

When was CVE-2021-37576 disclosed?

CVE-2021-37576 was first published in the National Vulnerability Database on July 26, 2021, with the most recent update on November 21, 2024. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.

Is CVE-2021-37576 actively exploited?

CVE-2021-37576 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 4.2% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.

What is the CVSS score of CVE-2021-37576?

CVE-2021-37576 has a CVSS v3 base score of 7.8 (NVD).

How do I remediate CVE-2021-37576?

Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2021-37576, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

Dependency Blast Radius

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CVE-2021-37576

Published

Last Modified

References (14)

Patch Availability(13)

Weakness Classification(1)

All Vendor Advisories

Data Freshness Timeline

Frequently asked(5)

Dependency Blast Radius

Is Your Infrastructure Affected by CVE-2021-37576?

Same vendor

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CVE-2021-37576

📅 Published

🔄 Last Modified

🔗 References (14)

Patch Availability(13)

Weakness Classification(1)

All Vendor Advisories

Data Freshness Timeline

❓ Frequently asked(5)

Dependency Blast Radius

Is Your Infrastructure Affected by CVE-2021-37576?

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References (14)

Frequently asked(5)

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