// For flags

CVE-2023-52619

pstore/ram: Fix crash when setting number of cpus to an odd number

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:

pstore/ram: Fix crash when setting number of cpus to an odd number

When the number of cpu cores is adjusted to 7 or other odd numbers,
the zone size will become an odd number.
The address of the zone will become:
addr of zone0 = BASE
addr of zone1 = BASE + zone_size
addr of zone2 = BASE + zone_size*2
...
The address of zone1/3/5/7 will be mapped to non-alignment va.
Eventually crashes will occur when accessing these va.

So, use ALIGN_DOWN() to make sure the zone size is even
to avoid this bug.

En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: pstore/ram: soluciona el fallo al establecer el número de CPU en un número impar. Cuando el número de núcleos de CPU se ajusta a 7 u otros números impares, el tamaño de la zona se convertirá en un número impar. La dirección de la zona se convertirá en: dirección de zona0 = BASE dirección de zona1 = BASE + tamaño_zona dirección de zona2 = BASE + tamaño_zona*2 ... La dirección de zona1/3/5/7 se asignará a va no alineada . Eventualmente se producirán fallas al acceder a estos va. Entonces, use ALIGN_DOWN() para asegurarse de que el tamaño de la zona sea uniforme para evitar este error.

A vulnerability was found in the pstore/ram component of the Linux kernel, which caused crashes when the number of CPU cores was set to an odd number. This issue occurs because the odd-numbered zones became misaligned. This flaw allows a local, authenticated attacker to cause a 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
  • 2024-03-06 CVE Reserved
  • 2024-03-18 CVE Published
  • 2024-03-19 EPSS Updated
  • 2024-11-04 CVE Updated
  • ---------- Exploited in Wild
  • ---------- KEV Due Date
  • ---------- First Exploit
CWE
  • CWE-99: Improper Control of Resource Identifiers ('Resource Injection')
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"
 < 4.19.307
Search vendor "Linux" for product "Linux Kernel" and version " < 4.19.307"
en
Affected
Linux
Search vendor "Linux"
 Linux Kernel
Search vendor "Linux" for product "Linux Kernel"
 < 5.4.269
Search vendor "Linux" for product "Linux Kernel" and version " < 5.4.269"
en
Affected
Linux
Search vendor "Linux"
 Linux Kernel
Search vendor "Linux" for product "Linux Kernel"
 < 5.10.210
Search vendor "Linux" for product "Linux Kernel" and version " < 5.10.210"
en
Affected
Linux
Search vendor "Linux"
 Linux Kernel
Search vendor "Linux" for product "Linux Kernel"
 < 5.15.149
Search vendor "Linux" for product "Linux Kernel" and version " < 5.15.149"
en
Affected
Linux
Search vendor "Linux"
 Linux Kernel
Search vendor "Linux" for product "Linux Kernel"
 < 6.1.77
Search vendor "Linux" for product "Linux Kernel" and version " < 6.1.77"
en
Affected
Linux
Search vendor "Linux"
 Linux Kernel
Search vendor "Linux" for product "Linux Kernel"
 < 6.6.16
Search vendor "Linux" for product "Linux Kernel" and version " < 6.6.16"
en
Affected
Linux
Search vendor "Linux"
 Linux Kernel
Search vendor "Linux" for product "Linux Kernel"
 < 6.7.4
Search vendor "Linux" for product "Linux Kernel" and version " < 6.7.4"
en
Affected
Linux
Search vendor "Linux"
 Linux Kernel
Search vendor "Linux" for product "Linux Kernel"
 < 6.8
Search vendor "Linux" for product "Linux Kernel" and version " < 6.8"
en
Affected