CVE-2026-93045

Last refreshed2026-10-19

Status: UPDATED | Advisory ID: CVE-2026-93045

Key Details

CVE	CVE-2026-93045
CVSS Score / Version	7.8 (High) / CVSS v3.1
Updated	2026-10-19
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: Reject arena frees below the arena base

bpf_arena_free_pages() accepts scalar arena addresses. The runtime

masks the address to the low 32 bits and reconstructs a full user

address from the arena base before returning the range to the arena

free tree.

When the scalar value is below the low 32 bits of the arena base,

full_uaddr falls below user_vm_start. The existing upper-end clipping

then turns this into an out-of-range free-tree offset. A later

allocation can reuse that offset and return an address below the arena

mapping.

Reject such frees before computing the clipped range. (NVD)

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

Source	Reference
NVD	https://nvd.nist.gov/vuln/detail/CVE-2026-93045
CVE	https://www.cve.org/CVERecord?id=CVE-2026-93045

Source

Reference

NVD

CVE