// For flags

CVE-2024-26831

net/handshake: Fix handshake_req_destroy_test1

Severity Score

"-"
*CVSS v-

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*EPSS

Affected Versions

*CPE

Public Exploits

0
*Multiple Sources

Exploited in Wild

-
*KEV

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*SSVC
Descriptions

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

net/handshake: Fix handshake_req_destroy_test1

Recently, handshake_req_destroy_test1 started failing:

Expected handshake_req_destroy_test == req, but
handshake_req_destroy_test == 0000000000000000
req == 0000000060f99b40
not ok 11 req_destroy works

This is because "sock_release(sock)" was replaced with "fput(filp)"
to address a memory leak. Note that sock_release() is synchronous
but fput() usually delays the final close and clean-up.

The delay is not consequential in the other cases that were changed
but handshake_req_destroy_test1 is testing that handshake_req_cancel()
followed by closing the file actually does call the ->hp_destroy
method. Thus the PTR_EQ test at the end has to be sure that the
final close is complete before it checks the pointer.

We cannot use a completion here because if ->hp_destroy is never
called (ie, there is an API bug) then the test will hang.

Reported by: Guenter Roeck <linux@roeck-us.net>

En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: net/handshake: Fix handshake_req_destroy_test1 Recientemente, handshake_req_destroy_test1 comenzó a fallar: Se esperaba handshake_req_destroy_test == req, pero handshake_req_destroy_test == 0000000000000000 req == 0000000060f99b40 no ok 11 req_destroy funciona Esto se debe a que "sock_release( calcetín)" fue reemplazado por "fput(filp)" para solucionar una pérdida de memoria. Tenga en cuenta que sock_release() es sincrónico pero fput() normalmente retrasa el cierre y la limpieza finales. El retraso no tiene consecuencias en los otros casos que se cambiaron, pero handshake_req_destroy_test1 está probando que handshake_req_cancel() seguido del cierre del archivo realmente llama al método -&gt;hp_destroy. Por lo tanto, la prueba PTR_EQ al final debe asegurarse de que el cierre final esté completo antes de verificar el puntero. No podemos usar una finalización aquí porque si nunca se llama a -&gt;hp_destroy (es decir, hay un error de API), la prueba se bloqueará. Reportado por: Guenter Roeck

*Credits: N/A
CVSS Scores
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* Common Vulnerability Scoring System
SSVC
  • Decision:Track
Exploitation
None
Automatable
No
Tech. Impact
Partial
* Organization's Worst-case Scenario
Timeline
  • 2024-02-19 CVE Reserved
  • 2024-04-17 CVE Published
  • 2024-04-18 EPSS Updated
  • 2024-12-19 CVE Updated
  • ---------- Exploited in Wild
  • ---------- KEV Due Date
  • ---------- First Exploit
CWE
CAPEC
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"
>= 6.6 < 6.6.18
Search vendor "Linux" for product "Linux Kernel" and version " >= 6.6 < 6.6.18"
en
Affected
Linux
Search vendor "Linux"
Linux Kernel
Search vendor "Linux" for product "Linux Kernel"
>= 6.6 < 6.7.6
Search vendor "Linux" for product "Linux Kernel" and version " >= 6.6 < 6.7.6"
en
Affected
Linux
Search vendor "Linux"
Linux Kernel
Search vendor "Linux" for product "Linux Kernel"
>= 6.6 < 6.8
Search vendor "Linux" for product "Linux Kernel" and version " >= 6.6 < 6.8"
en
Affected
Linux
Search vendor "Linux"
Linux Kernel
Search vendor "Linux" for product "Linux Kernel"
6.5.6
Search vendor "Linux" for product "Linux Kernel" and version "6.5.6"
en
Affected