CVE-2021-38202

Severity: high (CVSS 7.5 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 3.2% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2021-08-08 · updated 2026-10-14
Weakness: CWE-125

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.

Affected products

Linux kernel: before 5.13.4 — fixed in 5.13.4
NetApp Element Software: all versions
NetApp Hci Bootstrap Os: all versions
NetApp Hci Management Node: all versions
NetApp Solidfire: all versions

How to fix

Upgrade to a fixed version: Linux kernel 5.13.4. Check the vendor advisory for mitigations.

References

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

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