CVE-2026-64354

Last refreshed2026-10-17

Status: UPDATED | Advisory ID: CVE-2026-64354

Key Details

CVE	CVE-2026-64354
CVSS Score / Version	7.8 (High) / CVSS v3.1
Updated	2026-10-16
CVSS Vector	`CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H`
CVSS Prose	attack vector is local; attack complexity is low; privileges required is low; user interaction is none; scope is unchanged; confidentiality impact is high; integrity impact is high; availability impact is high.
Affected products	Linux Kernel

Vendor	Product	Affected Versions	Patch Status
Linux	Linux Kernel

Vendor

Product

Affected Versions

Patch Status

Linux

Linux Kernel

Subsystems	OT Supporting Infrastructure
Sectors	All Sectors

In the Linux kernel, the following vulnerability has been resolved:

bpf: Validate BTF repeated field counts before expansion

btf_parse_struct_metas() walks user-supplied BTF during BPF_BTF_LOAD,

and btf_repeat_fields() expands repeatable fields from array elements

into the fixed BTF_FIELDS_MAX scratch array used by btf_parse_fields().

The remaining-capacity check performs the expanded field count calculation

in u32. A malformed BTF can wrap that calculation, causing the check to

pass even when the expanded field count exceeds the scratch array

capacity. The following memcpy() can then write past the end of the

array.

Use checked addition and multiplication before copying repeated fields

and reject impossible counts. (NVD)

Monitor Linux's web page for any future patch releases.

Source	Reference
NVD	https://nvd.nist.gov/vuln/detail/CVE-2026-64354
CVE	https://www.cve.org/CVERecord?id=CVE-2026-64354

Source

Reference

NVD

CVE