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Vulnerability record · CVE-2021-38202 · published 8 August 2021

CVE-2021-38202: Linux kernel out-of-bounds read vulnerability

Linux · Linux Kernel

fs/nfsd/trace.h in the Linux kernel before 5.13.4 might allow remote attackers to cause a denial of service (out-of-bounds read in strlen) by sending NFS traffic when the trace event framework is being used for nfsd.

7.5 CVSS 3.1 High EPSS 3.2% · top 12.4% CWE-125 · Out-of-bounds read
7.5CVSS 3.1 base score, v2 5.0
3.2%EPSS exploitation probability, 30 days
NoNot in CISA KEV
5Affected product versions listed by NVD
7References
17 Jun 2026Last modified by NVD

Description

fs/nfsd/trace.h in the Linux kernel before 5.13.4 might allow remote attackers to cause a denial of service (out-of-bounds read in strlen) by sending NFS traffic when the trace event framework is being used for nfsd.

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

Affected products

5 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.13.4 Mailing ListPatchVendor Advisory
https://github.com/torvalds/linux/commit/7b08cf62b1239a4322427d677ea9363f0ab677c6 PatchThird Party Advisory
https://security.netapp.com/advisory/ntap-20210902-0010/ Third Party Advisory
https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.13.4 Mailing ListPatchVendor Advisory
https://github.com/torvalds/linux/commit/7b08cf62b1239a4322427d677ea9363f0ab677c6 PatchThird Party Advisory
https://security.netapp.com/advisory/ntap-20210902-0010/ Third Party Advisory
https://cert-portal.siemens.com/productcert/html/ssa-265688.html

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Source: NIST National Vulnerability Database (record CVE-2021-38202), CISA KEV, FIRST EPSS (scores of 2026-09-29). This page is refreshed as NVD updates the record.