Disclosure summary
In kernel/bpf/verifier.c in the Linux kernel before 5.12.13, a branch can be mispredicted (e.g., because of type confusion) and consequently an unprivileged BPF program can read arbitrary memory locations via a side-channel attack, aka CID-9183671af6db.
Source-reported weakness categories
CWE-843
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-2021-33624
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":"5.12.13"} |
| debian | debian_linux | 9.0 |
Original records & references
- NIST NVD record
- CVE Program record
- github.com
- github.com — Patch, Third Party Advisory
- lists.debian.org — Issue Tracking, Third Party Advisory
- www.usenix.org — Third Party Advisory
- github.com — Patch, Third Party Advisory
- lists.debian.org — Issue Tracking, Third Party Advisory
- www.usenix.org — Third Party Advisory
PUBLISHED 2021-06-23T12:15:07-04:00
MODIFIED 2026-10-08T17:17:35-04:00
INGESTED 2026-10-10T20:50:20-04:00