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

> Local attackers can trigger a double-free in the NetBSD kernel via a race condition in cryptodev, potentially leading to code execution or privilege escalation.

- **Severity:** Medium 5.7 (`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`)
- **Exploited in the wild:** Not known
- **Login needed:** Any signed-in user
- **Attackable:** Local or same network only
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 18 May 2026
- **Updated:** 14 Jul 2026
- **Also known as:** GHSA-5qv9-q5h2-c748

## What is CVE-2026-32848?

CVE-2026-32848 is a medium-severity vulnerability in NetBSD src, published on 18 May 2026. It can only be exploited from the same machine or local network, with no action from the victim.

### Official 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.

Weakness: CWE-415 (Double Free), CWE-362 (Concurrent Execution using Shared Resource with Improper Synchronization)

## Which versions are affected by CVE-2026-32848?


## How do I fix CVE-2026-32848?

No fix has been published for CVE-2026-32848 yet. Limit exposure of the affected software until one is available.

## Is CVE-2026-32848 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-32848 exists.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-32848 and fix it if it is affected.

What it is: CVE-2026-32848 is a medium-severity vulnerability in NetBSD src, published on 18 May 2026. It can only be exploited from the same machine or local network, with no action from the victim.
Exploitation: It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-32848 exists.

Affected product: NetBSD src. No package-level version data is available, so check the vendor advisory linked from the reference page.

Task:
1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.
2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.
3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.
4. Run the tests and summarise what changed and why.
5. If nothing in the project is affected, say so and change nothing.

Reference: https://insights.sbomify.com/CVE-2026-32848/ (Markdown: https://insights.sbomify.com/CVE-2026-32848/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-32848
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-32848
- OSV: https://osv.dev/vulnerability/CVE-2026-32848

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-32848/
Summaries are generated and may contain mistakes; the official description above is the record.