Description
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.
Scores
CVSS v3
6.0
EPSS
0.0018
EPSS Percentile
39.1%
Attack Vector
LOCAL
CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:N/A:H
Details
CWE
CWE-193
Status
published
Products (9)
canonical/ubuntu_linux
14.04
canonical/ubuntu_linux
16.04
canonical/ubuntu_linux
18.04
canonical/ubuntu_linux
20.04
debian/debian_linux
9.0
fedoraproject/fedora
32
fedoraproject/fedora
33
fedoraproject/fedora
34
linux/linux_kernel
< 5.11.8
Published
Mar 20, 2021
Tracked Since
Feb 18, 2026