Disclosure summary
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.
Source-reported weakness categories
CWE-203
Source-specific records & product guidance
Sources retain their own attribution and scoring. Follow the original record to confirm affected versions, fixed releases, and configuration conditions.
NIST National Vulnerability Database · NVD-CVE-2020-27170
Open original source · Updated Oct 08, 2026
Only CPE matches marked vulnerable=true are indexed. AND/OR platform conditions must be checked in the original NVD record.
| Vendor | Product / association | Version / bounds |
|---|---|---|
| linux | linux_kernel | * {"versionEndExcluding":"5.11.8"} |
| fedoraproject | fedora | 32 |
| fedoraproject | fedora | 33 |
| fedoraproject | fedora | 34 |
| 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 |
Original records & references
- NIST NVD record
- CVE Program record
- cdn.kernel.org — Patch, Vendor Advisory
- git.kernel.org — Patch, Vendor Advisory
- lists.debian.org — Mailing List, Third Party Advisory
- lists.fedoraproject.org
- lists.fedoraproject.org
- lists.fedoraproject.org
- www.openwall.com — Mailing List, Patch, Third Party Advisory
- cdn.kernel.org — Patch, Vendor Advisory
- git.kernel.org — Patch, Vendor Advisory
- lists.debian.org — Mailing List, Third Party Advisory
- lists.fedoraproject.org
- lists.fedoraproject.org
- lists.fedoraproject.org
- www.openwall.com — Mailing List, Patch, Third Party Advisory
PUBLISHED 2021-03-20T18:15:11-04:00
MODIFIED 2026-10-08T17:17:27-04:00
INGESTED 2026-10-10T20:50:20-04:00