# CVE-2026-42327: rust-openssl: rust-openssl provides OpenSSL bindings for the Rust programming language

CVE-2026-42327 is fixed in 31 products on 1 platform, first by DEBIAN-CVE-2026-42327, released May 14, 2026. It is not reported as exploited. Patch Radar priority: High.

- Web page: https://patchblox.com/security/cve/CVE-2026-42327
- Priority: High
- CVSS: n/a (important)
- EPSS: 0.0021
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: May 14, 2026

## Description

rust-openssl provides OpenSSL bindings for the Rust programming language. From 0.9.7 to before 0.10.79, X509Ref::ocsp_responders returns OCSP responder URLs from a certificate's AIA extension as OpensslString, whose Deref<Target = str> wraps the raw bytes with str::from_utf8_unchecked. OpenSSL does not enforce that the underlying IA5String is ASCII, so a certificate with non-UTF-8 bytes in its OCSP accessLocation causes safe Rust code to construct a &str that violates the UTF-8 invariant — resulting in undefined behavior. This vulnerability is fixed in 0.10.79.

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | afterburn opensuse-leap 16.0 | 5.10.0.git73.b97f772-160000.1.1 | [OPENSUSE-SU-2026:21386-1](https://patchblox.com/security/data/fix/linux/opensuse-su-2026-21386-1.md) | Jul 20, 2026 |
| Linux | afterburn sles 16.0 | 5.10.0.git73.b97f772-160000.1.1 | [SUSE-SU-2026:22827-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-22827-1.md) | Jul 20, 2026 |
| Linux | agama opensuse-leap 16.0 | 17+647.daf9950fc-160000.12.1 | [OPENSUSE-SU-2026:21292-1](https://patchblox.com/security/data/fix/linux/opensuse-su-2026-21292-1.md) | Jul 10, 2026 |
| Linux | agama sles 16.0 | 17+647.daf9950fc-160000.12.1 | [SUSE-SU-2026:22622-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-22622-1.md) | Jul 10, 2026 |
| Linux | aws-nitro-enclaves-cli amzn 2023 | 1.4.5-0.amzn2023 | [ALAS2023-2026-2034](https://patchblox.com/security/data/fix/linux/alas2023-2026-2034.md) | Aug 3, 2026 |
| Linux | aws-nitro-enclaves-cli opensuse-leap 16.0 | 1.4.5~git0.18a5f6f-160000.1.1 | [OPENSUSE-SU-2026:21406-1](https://patchblox.com/security/data/fix/linux/opensuse-su-2026-21406-1.md) | Jul 22, 2026 |
| Linux | aws-nitro-enclaves-cli sles 15.6 | 1.4.5~git0.18a5f6f-150600.10.12.1 | [SUSE-SU-2026:3152-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-3152-1.md) | Jul 21, 2026 |
| Linux | aws-nitro-enclaves-cli sles 15.7 | 1.4.5~git0.18a5f6f-150600.10.12.1 | [SUSE-SU-2026:3152-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-3152-1.md) | Jul 21, 2026 |
| Linux | aws-nitro-enclaves-cli sles 16.0 | 1.4.5~git0.18a5f6f-160000.1.1 | [SUSE-SU-2026:22841-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-22841-1.md) | Jul 22, 2026 |
| Linux | aws-nitro-enclaves-cli-devel amzn 2023 | 1.4.5-0.amzn2023 | [ALAS2023-2026-2034](https://patchblox.com/security/data/fix/linux/alas2023-2026-2034.md) | Aug 3, 2026 |
| Linux | aws-nitro-enclaves-cli-integration-tests amzn 2023 | 1.4.5-0.amzn2023 | [ALAS2023-2026-2034](https://patchblox.com/security/data/fix/linux/alas2023-2026-2034.md) | Aug 3, 2026 |
| Linux | clamav1.5 amzn 2023 | 1.5.2-1.amzn2023.0.2 | [ALAS2023-2026-1870](https://patchblox.com/security/data/fix/linux/alas2023-2026-1870.md) | Jun 22, 2026 |
| Linux | clamav1.5-data amzn 2023 | 1.5.2-1.amzn2023.0.2 | [ALAS2023-2026-1870](https://patchblox.com/security/data/fix/linux/alas2023-2026-1870.md) | Jun 22, 2026 |
| Linux | clamav1.5-debuginfo amzn 2023 | 1.5.2-1.amzn2023.0.2 | [ALAS2023-2026-1870](https://patchblox.com/security/data/fix/linux/alas2023-2026-1870.md) | Jun 22, 2026 |
| Linux | clamav1.5-debugsource amzn 2023 | 1.5.2-1.amzn2023.0.2 | [ALAS2023-2026-1870](https://patchblox.com/security/data/fix/linux/alas2023-2026-1870.md) | Jun 22, 2026 |
| Linux | clamav1.5-devel amzn 2023 | 1.5.2-1.amzn2023.0.2 | [ALAS2023-2026-1870](https://patchblox.com/security/data/fix/linux/alas2023-2026-1870.md) | Jun 22, 2026 |
| Linux | clamav1.5-doc amzn 2023 | 1.5.2-1.amzn2023.0.2 | [ALAS2023-2026-1870](https://patchblox.com/security/data/fix/linux/alas2023-2026-1870.md) | Jun 22, 2026 |
| Linux | clamav1.5-filesystem amzn 2023 | 1.5.2-1.amzn2023.0.2 | [ALAS2023-2026-1870](https://patchblox.com/security/data/fix/linux/alas2023-2026-1870.md) | Jun 22, 2026 |
| Linux | clamav1.5-freshclam amzn 2023 | 1.5.2-1.amzn2023.0.2 | [ALAS2023-2026-1870](https://patchblox.com/security/data/fix/linux/alas2023-2026-1870.md) | Jun 22, 2026 |
| Linux | clamav1.5-freshclam-debuginfo amzn 2023 | 1.5.2-1.amzn2023.0.2 | [ALAS2023-2026-1870](https://patchblox.com/security/data/fix/linux/alas2023-2026-1870.md) | Jun 22, 2026 |
| Linux | clamav1.5-lib amzn 2023 | 1.5.2-1.amzn2023.0.2 | [ALAS2023-2026-1870](https://patchblox.com/security/data/fix/linux/alas2023-2026-1870.md) | Jun 22, 2026 |
| Linux | clamav1.5-lib-debuginfo amzn 2023 | 1.5.2-1.amzn2023.0.2 | [ALAS2023-2026-1870](https://patchblox.com/security/data/fix/linux/alas2023-2026-1870.md) | Jun 22, 2026 |
| Linux | clamav1.5-milter amzn 2023 | 1.5.2-1.amzn2023.0.2 | [ALAS2023-2026-1870](https://patchblox.com/security/data/fix/linux/alas2023-2026-1870.md) | Jun 22, 2026 |
| Linux | clamav1.5-milter-debuginfo amzn 2023 | 1.5.2-1.amzn2023.0.2 | [ALAS2023-2026-1870](https://patchblox.com/security/data/fix/linux/alas2023-2026-1870.md) | Jun 22, 2026 |
| Linux | clamd1.5 amzn 2023 | 1.5.2-1.amzn2023.0.2 | [ALAS2023-2026-1870](https://patchblox.com/security/data/fix/linux/alas2023-2026-1870.md) | Jun 22, 2026 |
| Linux | clamd1.5-debuginfo amzn 2023 | 1.5.2-1.amzn2023.0.2 | [ALAS2023-2026-1870](https://patchblox.com/security/data/fix/linux/alas2023-2026-1870.md) | Jun 22, 2026 |
| Linux | himmelblau sles 15.6 | 2.3.14+git0.e23b4c54-150500.11.12.1 | [SUSE-SU-2026:3576-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-3576-1.md) | Aug 11, 2026 |
| Linux | libkrun opensuse-leap 16.0 | 1.4.10-160000.3.1 | [OPENSUSE-SU-2026:21464-1](https://patchblox.com/security/data/fix/linux/opensuse-su-2026-21464-1.md) | Jul 28, 2026 |
| Linux | python-cryptography opensuse-leap 16.0 | 44.0.3-160000.4.1 | [OPENSUSE-SU-2026:21294-1](https://patchblox.com/security/data/fix/linux/opensuse-su-2026-21294-1.md) | Jul 10, 2026 |
| Linux | python-cryptography sles 15.6 | 41.0.3-150600.23.9.1 | [SUSE-SU-2026:3026-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-3026-1.md) | Jul 15, 2026 |
| Linux | python-cryptography sles 15.7 | 41.0.3-150600.23.9.1 | [SUSE-SU-2026:3026-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-3026-1.md) | Jul 15, 2026 |
| Linux | python-cryptography sles 16.0 | 44.0.3-160000.4.1 | [SUSE-SU-2026:22624-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-22624-1.md) | Jul 10, 2026 |
| Linux | python-maturin opensuse-leap 16.0 | 1.8.7-160000.5.1 | [OPENSUSE-SU-2026:21285-1](https://patchblox.com/security/data/fix/linux/opensuse-su-2026-21285-1.md) | Jul 10, 2026 |
| Linux | python-maturin sles 16.0 | 1.8.7-160000.5.1 | [SUSE-SU-2026:22615-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-22615-1.md) | Jul 10, 2026 |
| Linux | rust-keylime opensuse-leap 16.0 | 0.2.9+49-160000.1.1 | [OPENSUSE-SU-2026:21274-1](https://patchblox.com/security/data/fix/linux/opensuse-su-2026-21274-1.md) | Jul 9, 2026 |
| Linux | rust-keylime sles 16.0 | 0.2.9+49-160000.1.1 | [SUSE-SU-2026:22583-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-22583-1.md) | Jul 9, 2026 |
| Linux | rust-openssl Debian 14 | 0.10.79-1 | [DEBIAN-CVE-2026-42327](https://patchblox.com/security/data/fix/linux/debian-cve-2026-42327.md) | May 14, 2026 |
| Linux | rustup opensuse-leap 16.0 | 1.29.1~0-160000.1.1 | [OPENSUSE-SU-2026:22016-1](https://patchblox.com/security/data/fix/linux/opensuse-su-2026-22016-1.md) | Oct 2, 2026 |
| Linux | rustup sles 15.6 | 1.28.2~0-150600.10.13.1 | [SUSE-SU-2026:2832-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-2832-1.md) | Jul 9, 2026 |
| Linux | rustup sles 15.7 | 1.28.2~0-150600.10.13.1 | [SUSE-SU-2026:2832-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-2832-1.md) | Jul 9, 2026 |
| Linux | rustup sles 16.0 | 1.29.1~0-160000.1.1 | [SUSE-SU-2026:24014-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-24014-1.md) | Oct 2, 2026 |
| Linux | sccache opensuse-leap 16.0 | 0.18.0~2-160000.1.1 | [OPENSUSE-SU-2026:21982-1](https://patchblox.com/security/data/fix/linux/opensuse-su-2026-21982-1.md) | Sep 30, 2026 |
| Linux | sccache sles 15.6 | 0.16.0~0-150600.10.11.1 | [SUSE-SU-2026:3022-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-3022-1.md) | Jul 15, 2026 |
| Linux | sccache sles 15.7 | 0.16.0~0-150600.10.11.1 | [SUSE-SU-2026:3022-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-3022-1.md) | Jul 15, 2026 |
| Linux | sccache sles 16.0 | 0.18.0~2-160000.1.1 | [SUSE-SU-2026:23983-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-23983-1.md) | Sep 30, 2026 |
| Linux | sdbootutil opensuse-leap 16.0 | 1+git20260908.c641fc2-160000.1.1 | [OPENSUSE-SU-2026:21933-1](https://patchblox.com/security/data/fix/linux/opensuse-su-2026-21933-1.md) | Sep 23, 2026 |
| Linux | snpguest opensuse-leap 16.0 | 0.10.0-160000.2.1 | [OPENSUSE-SU-2026:21579-1](https://patchblox.com/security/data/fix/linux/opensuse-su-2026-21579-1.md) | Aug 13, 2026 |
| Linux | snpguest sles 15.6 | 0.3.2-150600.3.14.1 | [SUSE-SU-2026:3577-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-3577-1.md) | Aug 11, 2026 |
| Linux | snpguest sles 15.7 | 0.10.0-150700.3.6.1 | [SUSE-SU-2026:3791-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-3791-1.md) | Aug 25, 2026 |
| Linux | snpguest sles 16.0 | 0.10.0-160000.2.1 | [SUSE-SU-2026:23236-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-23236-1.md) | Aug 13, 2026 |
| Linux | snphost opensuse-leap 16.0 | 0.6.0-160000.3.1 | [OPENSUSE-SU-2026:21638-1](https://patchblox.com/security/data/fix/linux/opensuse-su-2026-21638-1.md) | Aug 24, 2026 |
| Linux | snphost sles 15.7 | 0.6.1-150700.3.6.1 | [SUSE-SU-2026:3642-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-3642-1.md) | Aug 18, 2026 |
| Linux | snphost sles 16.0 | 0.6.0-160000.3.1 | [SUSE-SU-2026:23327-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-23327-1.md) | Aug 24, 2026 |

---

Data as of 2026-11-08T19:12:23Z UTC. Source: Patchblox Patch Radar (https://patchblox.com/security/patch-radar). Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo

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