CVE-2021-38166

HighCVSS 7.8/10Last modified Oct 8, 2026

Description

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.

Metrics

CVSS 3.1 7.8/10CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Weakness enumeration

CWE-190 CWE-787

Affected software

Vendor	Product	Versions
n/a	n/a	n/a

References

https://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf.git/commit/?id=c4eb1f403243fc7bbb7de644db8587c03de36da6Patch, Vendor Advisory
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/GUVLBJKZMWA3E3YXSH4SZ7BOYGJP4GXP/Third Party Advisory
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/UL6CH5M5PRLMA3KPBX4LPUO6Z73GRISO/Third Party Advisory
https://lore.kernel.org/bpf/20210806150419.109658-1-th.yasumatsu%40gmail.com/Patch
https://security.netapp.com/advisory/ntap-20210909-0001/Third Party Advisory
https://www.debian.org/security/2021/dsa-4978Third Party Advisory
https://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf.git/commit/?id=c4eb1f403243fc7bbb7de644db8587c03de36da6Patch, Vendor Advisory
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/GUVLBJKZMWA3E3YXSH4SZ7BOYGJP4GXP/Third Party Advisory
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/UL6CH5M5PRLMA3KPBX4LPUO6Z73GRISO/Third Party Advisory
https://lore.kernel.org/bpf/20210806150419.109658-1-th.yasumatsu%40gmail.com/Patch
https://security.netapp.com/advisory/ntap-20210909-0001/Third Party Advisory
https://www.debian.org/security/2021/dsa-4978Third Party Advisory

Timeline

Published: Aug 7, 2021
Last modified: Oct 8, 2026
NVD status: Analyzed

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