// For flags

CVE-2021-47240

net: qrtr: fix OOB Read in qrtr_endpoint_post

Severity Score

7.1
*CVSS v3

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: net: qrtr: fix OOB Read in qrtr_endpoint_post Syzbot reported slab-out-of-bounds Read in
qrtr_endpoint_post. The problem was in wrong
_size_ type: if (len != ALIGN(size, 4) + hdrlen) goto err; If size from qrtr_hdr is 4294967293 (0xfffffffd), the result of
ALIGN(size, 4) will be 0. In case of len == hdrlen and size == 4294967293
in header this check won't fail and skb_put_data(skb, data + hdrlen, size); will read out of bound from data, which is hdrlen allocated block.

En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: net: qrtr: arreglar OOB Lectura en qrtr_endpoint_post. Syzbot reportó slab-out-of-bounds Lectura en qrtr_endpoint_post. El problema estaba en el tipo de _tamaño_ incorrecto: if (len != ALIGN(size, 4) + hdrlen) goto err; Si el tamaño de qrtr_hdr es 4294967293 (0xfffffffd), el resultado de ALIGN(size, 4) será 0. En caso de len == hdrlen y size == 4294967293 en el encabezado, esta verificación no fallará y skb_put_data(skb, data + hdrlen, tamaño); leerá fuera de los límites de los datos, que son bloques asignados hdrlen.

In the Linux kernel, the following vulnerability has been resolved: net: qrtr: fix OOB Read in qrtr_endpoint_post Syzbot reported slab-out-of-bounds Read in qrtr_endpoint_post. The problem was in wrong _size_ type: if (len != ALIGN(size, 4) + hdrlen) goto err; If size from qrtr_hdr is 4294967293 (0xfffffffd), the result of ALIGN(size, 4) will be 0. In case of len == hdrlen and size == 4294967293 in header this check won't fail and skb_put_data(skb, data + hdrlen, size); will read out of bound from data, which is hdrlen allocated block.

*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
Attack Vector
Local
Attack Complexity
Low
Authentication
Single
Confidentiality
Complete
Integrity
None
Availability
Complete
* Common Vulnerability Scoring System
SSVC
  • Decision:Track
Exploitation
None
Automatable
No
Tech. Impact
Partial
* Organization's Worst-case Scenario
Timeline
  • 2024-04-10 CVE Reserved
  • 2024-05-21 CVE Published
  • 2024-12-19 CVE Updated
  • 2025-03-30 EPSS 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"
>= 4.15 < 4.19.196
Search vendor "Linux" for product "Linux Kernel" and version " >= 4.15 < 4.19.196"
en
Affected
Linux
Search vendor "Linux"
Linux Kernel
Search vendor "Linux" for product "Linux Kernel"
>= 4.15 < 5.4.128
Search vendor "Linux" for product "Linux Kernel" and version " >= 4.15 < 5.4.128"
en
Affected
Linux
Search vendor "Linux"
Linux Kernel
Search vendor "Linux" for product "Linux Kernel"
>= 4.15 < 5.10.46
Search vendor "Linux" for product "Linux Kernel" and version " >= 4.15 < 5.10.46"
en
Affected
Linux
Search vendor "Linux"
Linux Kernel
Search vendor "Linux" for product "Linux Kernel"
>= 4.15 < 5.12.13
Search vendor "Linux" for product "Linux Kernel" and version " >= 4.15 < 5.12.13"
en
Affected
Linux
Search vendor "Linux"
Linux Kernel
Search vendor "Linux" for product "Linux Kernel"
>= 4.15 < 5.13
Search vendor "Linux" for product "Linux Kernel" and version " >= 4.15 < 5.13"
en
Affected