CVE-2026-32848

medium

Description

NetBSD prior to commit ec8451e contains a race condition vulnerability in cryptodev_op() within the opencrypto subsystem that allows local attackers to trigger a double-free condition by concurrently issuing CIOCCRYPT operations on the same session identifier on SMP systems. Attackers can exploit mutable per-operation state embedded in the csession struct to corrupt kernel heap memory.

References

https://www.vulncheck.com/advisories/netbsd-cryptodev-race-condition-double-free-via-cryptodev-op

https://nasm.re/posts/uaf_netbsd_crypto/

https://github.com/NetBSD/src/commit/ec8451efc1565516aba9e7047e1a1a1ce7953a2f

Details

Source: Mitre, NVD

Published: 2026-05-18

Updated: 2026-05-18

Risk Information

CVSS v2

Base Score: 3.8

Vector: CVSS2#AV:L/AC:H/Au:S/C:N/I:N/A:C

Severity: Low

CVSS v3

Base Score: 4.7

Vector: CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H

Severity: Medium

CVSS v4

Base Score: 5.7

Vector: CVSS:4.0/AV:L/AC:H/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N

Severity: Medium

EPSS

EPSS: 0.00011