Disclosure summary
In kernel/bpf/hashtab.c in the Linux kernel through 5.13.8, there is an integer overflow and out-of-bounds write when many elements are placed in a single bucket. NOTE: exploitation might be impractical without the CAP_SYS_ADMIN capability.
Source-reported weakness categories
CWE-190, CWE-787
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-2021-38166
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 | * {"versionStartIncluding":"5.11","versionEndExcluding":"5.13.12"} |
| fedoraproject | fedora | 33 |
| fedoraproject | fedora | 34 |
| debian | debian_linux | 11.0 |
Original records & references
- NIST NVD record
- CVE Program record
- git.kernel.org — Patch, Vendor Advisory
- lists.fedoraproject.org — Third Party Advisory
- lists.fedoraproject.org — Third Party Advisory
- lore.kernel.org — Patch
- security.netapp.com — Third Party Advisory
- www.debian.org — Third Party Advisory
- git.kernel.org — Patch, Vendor Advisory
- lists.fedoraproject.org — Third Party Advisory
- lists.fedoraproject.org — Third Party Advisory
- lore.kernel.org — Patch
- security.netapp.com — Third Party Advisory
- www.debian.org — Third Party Advisory
PUBLISHED 2021-08-07T14:15:07-04:00
MODIFIED 2026-10-08T17:17:38-04:00
INGESTED 2026-10-10T20:50:20-04:00