CVE-2020-27170
MEDIUM4.7EPSS 0.15%linux-4.19 - security update
Published: 3/20/2021Modified: 4/28/2026
Also known as:DEBIAN-CVE-2020-27170
Description
An issue was discovered in the Linux kernel before 5.11.8. 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, aka CID-f232326f6966. This affects pointer types that do not define a ptr_limit.
Affected packages (2)
- Debian/linuxfrom 0, < 5.10.24-1
- Debian/linux-4.19from 0, < 4.19.181-1~deb9u1
CVSS scores
| Source | Version | Severity | Vector |
|---|---|---|---|
| osv | CVSS 3.1 | MEDIUM4.7 | CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N |