CVE-2021-38201

HIGHNVD 7.57.5—

7.5

net/sunrpc/xdr.c in the Linux kernel before 5.13.4 allows remote attackers to cause a denial of service (xdr_set_page_base slab-out-of-bounds access) by performing many NFS 4.2 READ_PLUS operations.

CVSS v3: 7.5
EG Score: 7.5(medium)
EPSS: 80.0%
KEV: Not listed

Published

August 8, 2021

Last Modified

November 21, 2024

References (6)

cve@mitrehttps://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.13.4
cve@mitrehttps://github.com/torvalds/linux/commit/6d1c0f3d28f98ea2736128ed3e46821496dc3a8c
cve@mitrehttps://security.netapp.com/advisory/ntap-20210902-0010/
af854a3a-2127-422b-91ae-364da2661108https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.13.4
af854a3a-2127-422b-91ae-364da2661108https://github.com/torvalds/linux/commit/6d1c0f3d28f98ea2736128ed3e46821496dc3a8c
af854a3a-2127-422b-91ae-364da2661108https://security.netapp.com/advisory/ntap-20210902-0010/

Patch Availability(5)

Vendor / Ecosystem	Fixed in / Patch	Released	Source
ubuntu	linux-aws-5.11-headers-5.11.0-1019 (5.11.0-1019.20~20.04.1) @ focal	2026-05-26	ubuntu
ubuntu	linux-modules-5.11.0-1017-azure (5.11.0-1017.18) @ hirsute	2026-05-26	ubuntu
ubuntu	linux-oem-20.04c (5.13.0.1014.18) @ focal	2026-05-26	ubuntu
redhat	kernel-rt-0:4.18.0-305.17.1.rt7.89.el8_4	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-119Buffer Operations Within Bounds (Buffer Overflow)

All Vendor Advisories

(6)

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-2021-38201?

CVE-2021-38201 is a high vulnerability published on August 8, 2021. net/sunrpc/xdr.c in the Linux kernel before 5.13.4 allows remote attackers to cause a denial of service (xdrsetpagebase slab-out-of-bounds access) by performing many NFS 4.2 READPLUS operations.

When was CVE-2021-38201 disclosed?

CVE-2021-38201 was first published in the National Vulnerability Database on August 8, 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-2021-38201 actively exploited?

CVE-2021-38201 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 80.0% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.

What is the CVSS score of CVE-2021-38201?

CVE-2021-38201 has a CVSS v3 base score of 7.5 (NVD).

How do I remediate CVE-2021-38201?

Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2021-38201, 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

See which npm, PyPI, Go, and Maven packages are affected by CVE-2021-38201

Explore →

Is Your Infrastructure Affected by CVE-2021-38201?

EchelonGraph automatically scans your cloud infrastructure and maps CVE exposure using blast radius analysis.

Start Free Scan →Browse All CVEs