Alpaquita LinuxStreamSecurity Advisory
Search Cve

CVE-2021-29155

Published: April 20, 2021Last modified: November 8, 2023

Description

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.

Severity score breakdown

ParameterValue
Base score5.5
Attack VectorLOCAL
Attack complexityLOW
Privileges requiredLOW
User interactionNONE
ScopeUNCHANGED
ConfidentialityHIGH
Integrity impactNONE
Availability impactNONE
VectorCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N

Status

ProductReleasePackageStatus
Alpaquita LinuxStreamlinux-ltsUnknown (6.1.33-r0)

References

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