CVE-2021-47001
xprtrdma: Fix cwnd update ordering
Severity Score
Exploit Likelihood
Affected Versions
Public Exploits
0Exploited in Wild
-Decision
Descriptions
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().
En el kernel de Linux, se resolvió la siguiente vulnerabilidad: xprtrdma: corrige el orden de actualización de cwnd Después de una reconexión, el controlador de respuesta abre cwnd (y así permite que se envíen más llamadas RPC) /antes/ rpcrdma_post_recvs() puede publicar suficiente recepción WR para recibir sus respuestas. Esto provoca un RNR y la nueva conexión se pierde inmediatamente. La ejecución se expone más claramente cuando KASAN y la inyección de desconexión están habilitados. Esto ralentiza rpcrdma_rep_create() lo suficiente como para permitir que el lado de envío publique un montón de llamadas RPC antes de que el controlador de finalización de recepción pueda invocar ib_post_recv().
CVSS Scores
SSVC
- Decision:Track
Timeline
- 2024-02-27 CVE Reserved
- 2024-02-28 CVE Published
- 2024-02-29 EPSS Updated
- 2024-08-04 CVE Updated
- ---------- Exploited in Wild
- ---------- KEV Due Date
- ---------- First Exploit
CWE
CAPEC
References (6)
| URL | Tag | Source |
|---|---|---|
| https://git.kernel.org/stable/c/2ae50ad68cd79224198b525f7bd645c9da98b6ff | Vuln. Introduced | |
| https://git.kernel.org/stable/c/3791c5982ba1eebf2900ee7ca7b9a89619c26d54 | Vuln. Introduced |
| URL | Date | SRC |
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| URL | Date | SRC |
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Affected Vendors, Products, and Versions
| Vendor | Product | Version | Other | Status | ||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Vendor | Product | Version | Other | Status | <-- --> | Vendor | Product | Version | Other | Status |
| Linux Search vendor "Linux" | Linux Kernel Search vendor "Linux" for product "Linux Kernel" | >= 5.5 < 5.10.38 Search vendor "Linux" for product "Linux Kernel" and version " >= 5.5 < 5.10.38" | en |
Affected
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| Linux Search vendor "Linux" | Linux Kernel Search vendor "Linux" for product "Linux Kernel" | >= 5.5 < 5.11.22 Search vendor "Linux" for product "Linux Kernel" and version " >= 5.5 < 5.11.22" | en |
Affected
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| Linux Search vendor "Linux" | Linux Kernel Search vendor "Linux" for product "Linux Kernel" | >= 5.5 < 5.12.5 Search vendor "Linux" for product "Linux Kernel" and version " >= 5.5 < 5.12.5" | en |
Affected
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| Linux Search vendor "Linux" | Linux Kernel Search vendor "Linux" for product "Linux Kernel" | >= 5.5 < 5.13 Search vendor "Linux" for product "Linux Kernel" and version " >= 5.5 < 5.13" | en |
Affected
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| Linux Search vendor "Linux" | Linux Kernel Search vendor "Linux" for product "Linux Kernel" | 5.4.13 Search vendor "Linux" for product "Linux Kernel" and version "5.4.13" | en |
Affected
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