CVE-2021-47001
xprtrdma: Fix cwnd update ordering
Description
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/ rpcrdma_post_recvs() 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 rpcrdma_rep_create() enough to allow the send side to post a bunch of RPC Calls before the Receive completion handler can invoke ib_post_recv().
INFO
Published Date :
Feb. 28, 2024, 9:15 a.m.
Last Modified :
April 11, 2025, 10:15 p.m.
Remotely Exploit :
No
Source :
416baaa9-dc9f-4396-8d5f-8c081fb06d67
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS 3.1 | MEDIUM | [email protected] |
Solution
- Update the Linux kernel package.
- Reboot the system after updating.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2021-47001.
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2021-47001 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2021-47001
weaknesses.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2021-47001 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2021-47001 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
-
CVE Modified by af854a3a-2127-422b-91ae-364da2661108
Apr. 11, 2025
Action Type Old Value New Value Added Reference https://security.netapp.com/advisory/ntap-20250411-0001/ -
Initial Analysis by [email protected]
Jan. 08, 2025
Action Type Old Value New Value Added CVSS V3.1 NIST AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H Added CWE NIST NVD-CWE-noinfo Added CPE Configuration OR *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 5.5 up to (excluding) 5.10.38 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 5.11 up to (excluding) 5.11.22 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 5.12 up to (excluding) 5.12.5 Changed Reference Type https://git.kernel.org/stable/c/19b5fa9489b5706bc878c3a522a7f771079e2fa0 No Types Assigned https://git.kernel.org/stable/c/19b5fa9489b5706bc878c3a522a7f771079e2fa0 Patch Changed Reference Type https://git.kernel.org/stable/c/19b5fa9489b5706bc878c3a522a7f771079e2fa0 No Types Assigned https://git.kernel.org/stable/c/19b5fa9489b5706bc878c3a522a7f771079e2fa0 Patch Changed Reference Type https://git.kernel.org/stable/c/35d8b10a25884050bb3b0149b62c3818ec59f77c No Types Assigned https://git.kernel.org/stable/c/35d8b10a25884050bb3b0149b62c3818ec59f77c Patch Changed Reference Type https://git.kernel.org/stable/c/35d8b10a25884050bb3b0149b62c3818ec59f77c No Types Assigned https://git.kernel.org/stable/c/35d8b10a25884050bb3b0149b62c3818ec59f77c Patch Changed Reference Type https://git.kernel.org/stable/c/8834ecb5df22b7ff3c9b0deba7726579bb613f95 No Types Assigned https://git.kernel.org/stable/c/8834ecb5df22b7ff3c9b0deba7726579bb613f95 Patch Changed Reference Type https://git.kernel.org/stable/c/8834ecb5df22b7ff3c9b0deba7726579bb613f95 No Types Assigned https://git.kernel.org/stable/c/8834ecb5df22b7ff3c9b0deba7726579bb613f95 Patch Changed Reference Type https://git.kernel.org/stable/c/eddae8be7944096419c2ae29477a45f767d0fcd4 No Types Assigned https://git.kernel.org/stable/c/eddae8be7944096419c2ae29477a45f767d0fcd4 Patch Changed Reference Type https://git.kernel.org/stable/c/eddae8be7944096419c2ae29477a45f767d0fcd4 No Types Assigned https://git.kernel.org/stable/c/eddae8be7944096419c2ae29477a45f767d0fcd4 Patch -
CVE Modified by af854a3a-2127-422b-91ae-364da2661108
Nov. 21, 2024
Action Type Old Value New Value Added Reference https://git.kernel.org/stable/c/19b5fa9489b5706bc878c3a522a7f771079e2fa0 Added Reference https://git.kernel.org/stable/c/35d8b10a25884050bb3b0149b62c3818ec59f77c Added Reference https://git.kernel.org/stable/c/8834ecb5df22b7ff3c9b0deba7726579bb613f95 Added Reference https://git.kernel.org/stable/c/eddae8be7944096419c2ae29477a45f767d0fcd4 -
CVE Modified by 416baaa9-dc9f-4396-8d5f-8c081fb06d67
May. 28, 2024
Action Type Old Value New Value -
CVE Modified by 416baaa9-dc9f-4396-8d5f-8c081fb06d67
May. 14, 2024
Action Type Old Value New Value -
CVE Received by 416baaa9-dc9f-4396-8d5f-8c081fb06d67
Feb. 28, 2024
Action Type Old Value New Value Added Description 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/ rpcrdma_post_recvs() 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 rpcrdma_rep_create() enough to allow the send side to post a bunch of RPC Calls before the Receive completion handler can invoke ib_post_recv(). Added Reference Linux https://git.kernel.org/stable/c/eddae8be7944096419c2ae29477a45f767d0fcd4 [No types assigned] Added Reference Linux https://git.kernel.org/stable/c/8834ecb5df22b7ff3c9b0deba7726579bb613f95 [No types assigned] Added Reference Linux https://git.kernel.org/stable/c/19b5fa9489b5706bc878c3a522a7f771079e2fa0 [No types assigned] Added Reference Linux https://git.kernel.org/stable/c/35d8b10a25884050bb3b0149b62c3818ec59f77c [No types assigned]