CVE-2020-27171

An issue was discovered in the Linux kernel before 5.11.8. kernel/bpf/verifier.c has an off-by-one error (with a resultant integer underflow) affecting out-of-bounds speculation on pointer arithmetic, leading to side-channel attacks that defeat Spectre mitigations and obtain sensitive information from kernel memory, aka CID-10d2bb2e6b1d.

An issue was discovered in the Linux kernel before 5.11.8. kernel/bpf/verifier.c has an off-by-one error (with a resultant integer underflow) affecting out-of-bounds speculation on pointer arithmetic, leading to side-channel attacks that defeat Spectre mitigations and obtain sensitive information from kernel memory, aka CID-10d2bb2e6b1d.

Se detectó un problema en el kernel de Linux versiones anteriores a 5.11.8. El archivo kernel/bpf/verifier.c presenta un error por un paso (con un subdesbordamiento de enteros resultante) afectando la especulación fuera de límites en la aritmética de punteros, conllevando a ataques de canal lateral que anulan las mitigaciones de Spectre y consiguen información confidencial de la memoria del kernel , también se conoce como CID-10d2bb2e6b1d