CVE-2021-29155

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.

CVSS v3.1

5.5 MEDIUMCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N

CVSS v2.0

2.1 LOWAV:L/AC:L/Au:N/C:P/I:N/A:N

EPSS

1.07% chance of exploitation in the next 30 days, 63th percentile

Published

2021-04-20

Updated

2024-08-03

Proof-of-concept exploits (2)

• Kakashiiiiy/CVE-2021-291553★ · 2021-06-04
• benschlueter/CVE-2021-291553★ · 2021-06-04

References

• CVE Record
• NVD entry

Related

• CVE-2021-33624
• CVE-2021-29133
• CVE-2021-29156
• CVE-2021-29115
• CVE-2021-29200
• CVE-2021-29063