CVE-2021-47001

Source
https://nvd.nist.gov/vuln/detail/CVE-2021-47001
Import Source
https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2021-47001.json
JSON Data
https://api.osv.dev/v1/vulns/CVE-2021-47001
Downstream
Related
Published
2024-02-28T09:15:38Z
Modified
2025-08-09T19:01:27Z
Severity
  • 4.7 (Medium) CVSS_V3 - CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H CVSS Calculator
Summary
[none]
Details

In the Linux kernel, the following vulnerability has been resolved:

xprtrdma: Fix cwnd update ordering

After a reconnect, the reply handler is opening the cwnd (and thus enabling more RPC Calls to be sent) /before/ rpcrdmapostrecvs() can post enough Receive WRs to receive their replies. This causes an RNR and the new connection is lost immediately.

The race is most clearly exposed when KASAN and disconnect injection are enabled. This slows down rpcrdmarepcreate() enough to allow the send side to post a bunch of RPC Calls before the Receive completion handler can invoke ibpostrecv().

References

Affected packages