// For flags

CVE-2023-52740

powerpc/64s/interrupt: Fix interrupt exit race with security mitigation switch

Severity Score

"-"
*CVSS v-

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:

powerpc/64s/interrupt: Fix interrupt exit race with security mitigation switch

The RFI and STF security mitigation options can flip the
interrupt_exit_not_reentrant static branch condition concurrently with
the interrupt exit code which tests that branch.

Interrupt exit tests this condition to set MSR[EE|RI] for exit, then
again in the case a soft-masked interrupt is found pending, to recover
the MSR so the interrupt can be replayed before attempting to exit
again. If the condition changes between these two tests, the MSR and irq
soft-mask state will become corrupted, leading to warnings and possible
crashes. For example, if the branch is initially true then false,
MSR[EE] will be 0 but PACA_IRQ_HARD_DIS clear and EE may not get
enabled, leading to warnings in irq_64.c.

En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: powerpc/64s/interrupt: corrige la ejecución de salida de interrupción con un interruptor de mitigación de seguridad. Las opciones de mitigación de seguridad RFI y STF pueden invertir la condición de rama estática interrupt_exit_not_reentrant al mismo tiempo que el código de salida de interrupción que prueba esa rama. . La salida de interrupción prueba esta condición para configurar MSR[EE|RI] para la salida, luego nuevamente en el caso de que se encuentre pendiente una interrupción enmascarada, para recuperar el MSR para que la interrupción pueda reproducirse antes de intentar salir nuevamente. Si la condición cambia entre estas dos pruebas, el estado de la máscara suave MSR e irq se dañará, lo que generará advertencias y posibles fallas. Por ejemplo, si la rama es inicialmente verdadera y luego falsa, MSR[EE] será 0 pero PACA_IRQ_HARD_DIS estará clara y es posible que EE no se habilite, lo que generará advertencias en irq_64.c.

*Credits: N/A
CVSS Scores
Attack Vector
-
Attack Complexity
-
Privileges Required
-
User Interaction
-
Scope
-
Confidentiality
-
Integrity
-
Availability
-
* Common Vulnerability Scoring System
SSVC
  • Decision:Track
Exploitation
None
Automatable
No
Tech. Impact
Partial
* Organization's Worst-case Scenario
Timeline
  • 2024-05-21 CVE Reserved
  • 2024-05-21 CVE Published
  • 2024-05-22 EPSS Updated
  • 2024-08-02 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"
 >= 5.14 < 5.15.94
Search vendor "Linux" for product "Linux Kernel" and version " >= 5.14 < 5.15.94"
en
Affected
Linux
Search vendor "Linux"
 Linux Kernel
Search vendor "Linux" for product "Linux Kernel"
 >= 5.14 < 6.1.12
Search vendor "Linux" for product "Linux Kernel" and version " >= 5.14 < 6.1.12"
en
Affected
Linux
Search vendor "Linux"
 Linux Kernel
Search vendor "Linux" for product "Linux Kernel"
 >= 5.14 < 6.2
Search vendor "Linux" for product "Linux Kernel" and version " >= 5.14 < 6.2"
en
Affected