CVE-2026-45971

MEDIUM

bpf: Limit bpf program signature size

Title source: cna
STIX 2.1

Description

In the Linux kernel, the following vulnerability has been resolved: bpf: Limit bpf program signature size Practical BPF signatures are significantly smaller than KMALLOC_MAX_CACHE_SIZE Allowing larger sizes opens the door for abuse by passing excessive size values and forcing the kernel into expensive allocation paths (via kmalloc_large or vmalloc).

Scores

CVSS v3 5.5
EPSS 0.0012
EPSS Percentile 2.2%
Attack Vector LOCAL
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Details

Status published
Products (11)
linux/Kernel 6.18.0 - 6.18.14linux
linux/Kernel 6.19.0 - 6.19.4linux
Linux/Linux < 6.18
Linux/Linux 349271568303695f0ac3563af153d2b4542f6986 - 5835a077c6f5c565d525eaca9fac01572b97a9b9
Linux/Linux 349271568303695f0ac3563af153d2b4542f6986 - ea1535e28bb3773fc0b3cbd1f3842b808016990c
Linux/Linux 349271568303695f0ac3563af153d2b4542f6986 - eb8166c79097996396468a341de258a798789d36
Linux/Linux 6.18
Linux/Linux 6.18.14 - 6.18.*
Linux/Linux 6.19.4 - 6.19.*
Linux/Linux 7.0
... and 1 more
Published May 27, 2026
Tracked Since May 27, 2026