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Description
Rejected reason: This CVE ID has been rejected or withdrawn by its CVE Numbering Authority.
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Title: kernel de Linux
Description: En el kernel de Linux, se resolvió la siguiente vulnerabilidad: x86/signal: detecta y previene un desbordamiento de la pila de señales alternativa. El kernel envía contexto a la pila del espacio de usuario para prepararse para el controlador de señales del usuario. Cuando el usuario ha proporcionado una pila de señales alternativa, a través de sigaltstack(2), es fácil para el núcleo verificar que el tamaño de la pila es suficiente para el contexto de hardware actual. Compruebe si escribir el contexto de hardware en la pila alternativa excederá su tamaño. En caso afirmativo, en lugar de corromper los datos del usuario y continuar con el controlador de señal original, se entrega una señal SIGSEGV inmediata. Refactorice el código de verificación del puntero de la pila desde on_sig_stack() y use el nuevo asistente. Si bien el kernel permite que el nuevo código fuente descubra y utilice un tamaño de pila de señales alternativo suficiente, esta verificación sigue siendo necesaria para proteger los archivos binarios con un tamaño de pila de señales alternativo insuficiente contra la corrupción de datos.
CVE Modified by kernel.org5/23/2024 10:15:09 AM
Action
Type
Old Value
New Value
Changed
Description
In the Linux kernel, the following vulnerability has been resolved:
x86/signal: Detect and prevent an alternate signal stack overflow
The kernel pushes context on to the userspace stack to prepare for the
user's signal handler. When the user has supplied an alternate signal
stack, via sigaltstack(2), it is easy for the kernel to verify that the
stack size is sufficient for the current hardware context.
Check if writing the hardware context to the alternate stack will exceed
it's size. If yes, then instead of corrupting user-data and proceeding with
the original signal handler, an immediate SIGSEGV signal is delivered.
Refactor the stack pointer check code from on_sig_stack() and use the new
helper.
While the kernel allows new source code to discover and use a sufficient
alternate signal stack size, this check is still necessary to protect
binaries with insufficient alternate signal stack size from data
corruption.
Rejected reason: This CVE ID has been rejected or withdrawn by its CVE Numbering Authority.
New CVE Received from kernel.org5/21/2024 11:15:19 AM
Action
Type
Old Value
New Value
Added
Description
In the Linux kernel, the following vulnerability has been resolved:
x86/signal: Detect and prevent an alternate signal stack overflow
The kernel pushes context on to the userspace stack to prepare for the
user's signal handler. When the user has supplied an alternate signal
stack, via sigaltstack(2), it is easy for the kernel to verify that the
stack size is sufficient for the current hardware context.
Check if writing the hardware context to the alternate stack will exceed
it's size. If yes, then instead of corrupting user-data and proceeding with
the original signal handler, an immediate SIGSEGV signal is delivered.
Refactor the stack pointer check code from on_sig_stack() and use the new
helper.
While the kernel allows new source code to discover and use a sufficient
alternate signal stack size, this check is still necessary to protect
binaries with insufficient alternate signal stack size from data
corruption.
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