---
id: CVE-2023-36660
title: >-
  The OCB feature in libnettle in Nettle 3.9 before 3.9.1 allows memory
  corruption.
summary: >-
  The OCB feature in libnettle in Nettle 3.9 before 3.9.1 allows memory
  corruption.
severity: critical
cvss: 9.8
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H'
cwe:
  - CWE-787
vendor: nettle_project
product: nettle
affected:
  - nettle = 3.9
published: '2023-06-25'
updated: '2026-10-15'
sourceUpdated: '2026-10-15T00:16:34.270'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2023-36660'
references:
  - url: 'https://bugzilla.suse.com/show_bug.cgi?id=1212112'
    label: cve@mitre.org
  - url: >-
      https://git.lysator.liu.se/nettle/nettle/-/commit/867a4548b95705291a3afdd66d76e7f17ba2618f
    label: cve@mitre.org
  - url: >-
      https://git.lysator.liu.se/nettle/nettle/-/compare/nettle_3.9_release_20230514...nettle_3.9.1_release_20230601
    label: cve@mitre.org
  - url: 'https://security.gentoo.org/glsa/202401-24'
    label: cve@mitre.org
  - url: 'https://bugzilla.suse.com/show_bug.cgi?id=1212112'
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: >-
      https://git.lysator.liu.se/nettle/nettle/-/commit/867a4548b95705291a3afdd66d76e7f17ba2618f
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: >-
      https://git.lysator.liu.se/nettle/nettle/-/compare/nettle_3.9_release_20230514...nettle_3.9.1_release_20230601
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: 'https://security.gentoo.org/glsa/202401-24'
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: 'https://cert-portal.siemens.com/productcert/html/ssa-794697.html'
    label: 0b142b55-0307-4c5a-b3c9-f314f3fb7c5e
tags:
  - nvd
  - cve.org
epss: 0.01023
epssPercentile: 0.63332
ingestedAt: '2026-10-15T01:08:04.202Z'
---

## Overview

The OCB feature in libnettle in Nettle 3.9 before 3.9.1 allows memory corruption.

## Affected

- `nettle = 3.9`

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.