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.
References (6)
Core 6
Core References
Mailing List x_refsource_misc
https://lore.kernel.org/bpf/20210806150419.109658-1-th.yasumatsu%40gmail.com/
Patch, Vendor Advisory x_refsource_misc
https://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf.git/commit/?id=c4eb1f403243fc7bbb7de644db8587c03de36da6
Mailing List, Third Party Advisory vendor-advisory
x_refsource_fedora
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/GUVLBJKZMWA3E3YXSH4SZ7BOYGJP4GXP/
Mailing List, Third Party Advisory vendor-advisory
x_refsource_fedora
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/UL6CH5M5PRLMA3KPBX4LPUO6Z73GRISO/
Third Party Advisory x_refsource_confirm
https://security.netapp.com/advisory/ntap-20210909-0001/
Third Party Advisory vendor-advisory
x_refsource_debian
https://www.debian.org/security/2021/dsa-4978
Scores
CVSS v3
7.8
EPSS
0.0009
EPSS Percentile
26.3%
Attack Vector
LOCAL
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Details
CWE
CWE-190
CWE-787
Status
published
Products (4)
debian/debian_linux
11.0
fedoraproject/fedora
33
fedoraproject/fedora
34
linux/linux_kernel
< 5.13.8
Published
Aug 07, 2021
Tracked Since
Feb 18, 2026