Is CVE-2026-32849 exploited in the wild?

No. Junglewise Threat Intelligence has no report of CVE-2026-32849 being exploited in the wild.

How severe is CVE-2026-32849?

Medium severity, with a CVSS score of 5.5, published 18 May 2026.

Which products and versions are affected?

NetBSD NetBSD prior to commit ec8451e.

Is there a fix for CVE-2026-32849?

A patch was published on 2026-04-29: Fix committed to NetBSD source tree Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

How is CVE-2026-32849 attacked?

It is attacked with local access, in an operating system.

Am I affected by CVE-2026-32849?

Check whether anything you run is named in the advisory. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

CVE-2026-32849: NetBSD signed integer overflow in cryptodev_op

CVE-2026-32849 · Severity: medium · CVSS 5.5 · Published 2026-05-18

A vulnerability in the NetBSD kernel's cryptographic framework could allow a local user to crash the system. By providing specially crafted data to the system's encryption interface, an attacker can trigger a kernel panic, leading to a denial of service. This affects the stability and availability of the operating system but does not directly expose user data.

Quick answers

Is CVE-2026-32849 exploited in the wild?: No. Junglewise Threat Intelligence has no report of CVE-2026-32849 being exploited in the wild.
How severe is CVE-2026-32849?: Medium severity, with a CVSS score of 5.5, published 18 May 2026.
Which products and versions are affected?: NetBSD NetBSD prior to commit ec8451e.
Is there a fix for CVE-2026-32849?: A patch was published on 2026-04-29: Fix committed to NetBSD source tree Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.
How is CVE-2026-32849 attacked?: It is attacked with local access, in an operating system.
Am I affected by CVE-2026-32849?: Check whether anything you run is named in the advisory. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

Technical details

A signed integer overflow exists in sys/opencrypto/cryptodev.c within the cryptodev_op() function. The local variable 'iov_len' is declared as a signed integer but is assigned an unsigned value from 'cop->dst_len'. If a local attacker provides a 'dst_len' value exceeding INT_MAX via /dev/crypto (specifically using a compression session type), it triggers undefined behavior. This results in corrupted UIO pointer arithmetic and a subsequent NULL pointer dereference, causing a kernel panic. The issue is mitigated if CONFIG_SVS is enabled but remains exploitable in other configurations. A fix was introduced in commit ec8451e.

Affected products

NetBSD NetBSD prior to commit ec8451e

Timeline

2026-02-06: disclosed: Vulnerability research published by nasm.re
2026-04-29: patched: Fix committed to NetBSD source tree
2026-05-18: advisory: CVE-2026-32849 published

References

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