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CWE

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CVE-2026-32848

Published: May 18, 2026

Modified: May 19, 2026

PUBLISHED

CVSS v3.1

4.7

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.

Vendor	Product	Versions
NetBSD	src	affected `0 - < ec8451efc1565516aba9e7047e1a1a1ce7953a2f`

Weaknesses (CWE)

CVSS v3.1 Details

CVSS v3.1 Vector

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

Attack Vector

Local

Attack Complexity

High

Privileges Required

Low

User Interaction

None

Scope

Unchanged

Confidentiality

None

Integrity

None

Availability

High

References

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

technical-description

exploit

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

patch

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

third-party-advisory

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