CVE-2026-32848NetBSD cryptodev Race Condition Double-Free via cryptodev_op()

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.

Data: CVE.org, NVD, CISA KEV, FIRST EPSS, Ubuntu. Published as the sources state it, in English.

Affected products and versions

References and patches

• https://nasm.re/posts/uaf_netbsd_crypto/ technical-descriptionexploit
• 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