Bug 1992741 (CVE-2021-38202) - CVE-2021-38202 kernel: out-of-bounds read in TRACE_EVENT() in fs/nfsd/trace.h by sending NFS traffic when the trace event framework is being used for nfsd
Summary: CVE-2021-38202 kernel: out-of-bounds read in TRACE_EVENT() in fs/nfsd/trace.h...
Keywords:
Status: CLOSED NOTABUG
Alias: CVE-2021-38202
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
high
high
Target Milestone: ---
Assignee: Red Hat Product Security
QA Contact:
URL:
Whiteboard:
Depends On: 1992742
Blocks: 1992743
TreeView+ depends on / blocked
 
Reported: 2021-08-11 17:05 UTC by Guilherme de Almeida Suckevicz
Modified: 2021-08-17 13:28 UTC (History)
43 users (show)

Fixed In Version: kernel 5.14 rc1
Doc Type: If docs needed, set a value
Doc Text:
A flaw was found in Linux kernel. A remote attacker could cause a denial of service attack by sending NFS traffic when trace event framework is being used for nfsd. The highest threat from this vulnerability is to data confidentiality and integrity as well as system availability.
Clone Of:
Environment:
Last Closed: 2021-08-17 13:28:14 UTC

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Description Guilherme de Almeida Suckevicz 2021-08-11 17:05:22 UTC 
A flaw was found in the Linux kernel. A remote attacker could cause a denial of service attack by sending NFS traffic when trace event framework is being used for nfsd. The highest threat from this vulnerability is to data confidentiality and integrity as well as system availability.

This flaw may allow a remote attacker 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.

Reference and upstream patch:
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=7b08cf62b1239a4322427d677ea9363f0ab677c6
Comment 1 Guilherme de Almeida Suckevicz 2021-08-11 17:05:50 UTC 
Created kernel tracking bugs for this issue:

Affects: fedora-all [bug 1992742]
Comment 3 Justin M. Forbes 2021-08-12 13:19:20 UTC 
This was fixed for Fedora with the 5.13.4 stable kernel updates.
Comment 4 Rohit Keshri 2021-08-15 20:05:18 UTC 
There was no shipped RHEL kernel version that was seen affected by this problem.
Comment 7 Product Security DevOps Team 2021-08-17 13:28:14 UTC 
This bug is now closed. Further updates for individual products will be reflected on the CVE page(s):

https://access.redhat.com/security/cve/cve-2021-38202
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