// For flags

CVE-2024-38576

rcu: Fix buffer overflow in print_cpu_stall_info()

Severity Score

7.1
*CVSS v3.1

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

0
*Multiple Sources

Exploited in Wild

-
*KEV

Decision

Track
*SSVC
Descriptions

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

rcu: Fix buffer overflow in print_cpu_stall_info()

The rcuc-starvation output from print_cpu_stall_info() might overflow the
buffer if there is a huge difference in jiffies difference. The situation
might seem improbable, but computers sometimes get very confused about
time, which can result in full-sized integers, and, in this case,
buffer overflow.

Also, the unsigned jiffies difference is printed using %ld, which is
normally for signed integers. This is intentional for debugging purposes,
but it is not obvious from the code.

This commit therefore changes sprintf() to snprintf() and adds a
clarifying comment about intention of %ld format.

Found by Linux Verification Center (linuxtesting.org) with SVACE.

En el kernel de Linux, se resolvió la siguiente vulnerabilidad: rcu: corrige el desbordamiento del búfer en print_cpu_stall_info() La salida rcuc-starvation de print_cpu_stall_info() podría desbordar el búfer si hay una gran diferencia en santiamén. La situación puede parecer improbable, pero las computadoras a veces se confunden mucho con el tiempo, lo que puede resultar en números enteros de tamaño completo y, en este caso, en un desbordamiento del búfer. Además, la diferencia de santiamén sin signo se imprime usando %ld, que normalmente es para enteros con signo. Esto es intencional con fines de depuración, pero no es obvio en el código. Por lo tanto, esta confirmación cambia sprintf() a snprintf() y agrega un comentario aclaratorio sobre la intención del formato %ld. Encontrado por el Centro de verificación de Linux (linuxtesting.org) con SVACE.

*Credits: N/A
CVSS Scores
Attack Vector
Local
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
None
Availability
High
* Common Vulnerability Scoring System
SSVC
  • Decision:Track
Exploitation
None
Automatable
No
Tech. Impact
Partial
* Organization's Worst-case Scenario
Timeline
  • 2024-06-18 CVE Reserved
  • 2024-06-19 CVE Published
  • 2024-06-20 EPSS Updated
  • 2024-12-19 CVE Updated
  • ---------- Exploited in Wild
  • ---------- KEV Due Date
  • ---------- First Exploit
CWE
  • CWE-121: Stack-based Buffer Overflow
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"
 >= 6.0 < 6.1.93
Search vendor "Linux" for product "Linux Kernel" and version " >= 6.0 < 6.1.93"
en
Affected
Linux
Search vendor "Linux"
 Linux Kernel
Search vendor "Linux" for product "Linux Kernel"
 >= 6.0 < 6.6.33
Search vendor "Linux" for product "Linux Kernel" and version " >= 6.0 < 6.6.33"
en
Affected
Linux
Search vendor "Linux"
 Linux Kernel
Search vendor "Linux" for product "Linux Kernel"
 >= 6.0 < 6.8.12
Search vendor "Linux" for product "Linux Kernel" and version " >= 6.0 < 6.8.12"
en
Affected
Linux
Search vendor "Linux"
 Linux Kernel
Search vendor "Linux" for product "Linux Kernel"
 >= 6.0 < 6.9.3
Search vendor "Linux" for product "Linux Kernel" and version " >= 6.0 < 6.9.3"
en
Affected
Linux
Search vendor "Linux"
 Linux Kernel
Search vendor "Linux" for product "Linux Kernel"
 >= 6.0 < 6.10
Search vendor "Linux" for product "Linux Kernel" and version " >= 6.0 < 6.10"
en
Affected