// For flags

CVE-2024-35905

bpf: Protect against int overflow for stack access size

Severity Score

5.5
*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:

bpf: Protect against int overflow for stack access size

This patch re-introduces protection against the size of access to stack
memory being negative; the access size can appear negative as a result
of overflowing its signed int representation. This should not actually
happen, as there are other protections along the way, but we should
protect against it anyway. One code path was missing such protections
(fixed in the previous patch in the series), causing out-of-bounds array
accesses in check_stack_range_initialized(). This patch causes the
verification of a program with such a non-sensical access size to fail.

This check used to exist in a more indirect way, but was inadvertendly
removed in a833a17aeac7.

En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: bpf: Protección contra desbordamiento int para el tamaño de acceso a la pila. Este parche reintroduce la protección contra que el tamaño de acceso a la memoria de la pila sea negativo; el tamaño de acceso puede parecer negativo como resultado de desbordar su representación int firmada. En realidad, esto no debería suceder, ya que existen otras protecciones en el camino, pero debemos protegernos contra ello de todos modos. A una ruta de código le faltaban dichas protecciones (corregidas en el parche anterior de la serie), lo que provocaba accesos a matrices fuera de los límites en check_stack_range_initialized(). Este parche hace que falle la verificación de un programa con un tamaño de acceso tan absurdo. Esta verificación solía existir de una manera más indirecta, pero se eliminó inadvertidamente en a833a17aeac7.

A flaw was found in the Linux kernel. An integer overflow vulnerability exists in the access size of a stack, such that the size of the access stack can appear negative as a result of overflowing its signed int representation. This issue can result in denial of service.

*Credits: N/A
CVSS Scores
Attack Vector
Local
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
None
Availability
High
* Common Vulnerability Scoring System
SSVC
  • Decision:Track
Exploitation
None
Automatable
No
Tech. Impact
Partial
* Organization's Worst-case Scenario
Timeline
  • 2024-05-17 CVE Reserved
  • 2024-05-19 CVE Published
  • 2024-05-20 EPSS Updated
  • 2024-11-05 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"
>= 5.10.209 < 5.10.215
Search vendor "Linux" for product "Linux Kernel" and version " >= 5.10.209 < 5.10.215"
en
Affected
Linux
Search vendor "Linux"
Linux Kernel
Search vendor "Linux" for product "Linux Kernel"
>= 5.15.148 < 5.15.154
Search vendor "Linux" for product "Linux Kernel" and version " >= 5.15.148 < 5.15.154"
en
Affected
Linux
Search vendor "Linux"
Linux Kernel
Search vendor "Linux" for product "Linux Kernel"
>= 6.1.75 < 6.1.85
Search vendor "Linux" for product "Linux Kernel" and version " >= 6.1.75 < 6.1.85"
en
Affected
Linux
Search vendor "Linux"
Linux Kernel
Search vendor "Linux" for product "Linux Kernel"
>= 6.6.14 < 6.6.26
Search vendor "Linux" for product "Linux Kernel" and version " >= 6.6.14 < 6.6.26"
en
Affected
Linux
Search vendor "Linux"
Linux Kernel
Search vendor "Linux" for product "Linux Kernel"
>= 6.8 < 6.8.5
Search vendor "Linux" for product "Linux Kernel" and version " >= 6.8 < 6.8.5"
en
Affected
Linux
Search vendor "Linux"
Linux Kernel
Search vendor "Linux" for product "Linux Kernel"
>= 6.8 < 6.9
Search vendor "Linux" for product "Linux Kernel" and version " >= 6.8 < 6.9"
en
Affected
Linux
Search vendor "Linux"
Linux Kernel
Search vendor "Linux" for product "Linux Kernel"
6.7.2
Search vendor "Linux" for product "Linux Kernel" and version "6.7.2"
en
Affected