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prionPRIOn knowledge basePRION:CVE-2021-29155
HistoryApr 20, 2021 - 4:15 p.m.

Design/Logic Flaw

2021-04-2016:15:00
PRIOn knowledge base
www.prio-n.com
4

5.5 Medium

AI Score

Confidence

High

0.001 Low

EPSS

Percentile

19.5%

An issue was discovered in the Linux kernel through 5.11.x. kernel/bpf/verifier.c performs undesirable out-of-bounds speculation on pointer arithmetic, leading to side-channel attacks that defeat Spectre mitigations and obtain sensitive information from kernel memory. Specifically, for sequences of pointer arithmetic operations, the pointer modification performed by the first operation is not correctly accounted for when restricting subsequent operations.