CVE intelligence

CVE-2026-93045

Vulnerability intelligence

Published Sep 17, 2026Sources checked Nov 3, 2026

7.8HIGHCVSS out of 10

What this means

Review the available evidence

CVE-2026-93045 and is rated High severity with a CVSS score of 7.8. It is not in the current CISA KEV record we collected. That does not prove exploitation has not occurred.

CISA KEVNot listedBased on the latest collected catalog

EPSS0.1%Estimated 30-day exploitation probability

Ransomware useNot markedCISA KEV ransomware field

Threat actors0Source-linked actor relationships

Overview

What is CVE-2026-93045?

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.

Source: NVD