# OPENSUSE-SU-2026:22169-1: bouncycastle security update

OPENSUSE-SU-2026:22169-1, released November 7, 2026, fixes 14 CVEs in bouncycastle (version 1.86-160000.1.1). None of them is reported as exploited. Patch Radar priority: High.

- Web page: https://patchblox.com/security/fix/linux/opensuse-su-2026-22169-1
- Platform: Linux
- Released: Nov 7, 2026
- Priority: High (Closes CVE-2026-17507, high severity)
- CVEs: 14, exploited: 0, on CISA KEV: 0
- Vendor advisory: https://osv.dev/vulnerability/openSUSE-SU-2026:22169-1

## Applies to

| Product | Release | Fixed in |
|---|---|---|
| [bouncycastle](https://patchblox.com/security/data/product/linux/bouncycastle.md) | opensuse-leap 16.0 | 1.86-160000.1.1 |

## CVEs this fix closes

| CVE | Priority | Title | CVSS | EPSS | Exploitation |
|---|---|---|---:|---:|---|
| [CVE-2026-17507](https://patchblox.com/security/data/cve/CVE-2026-17507.md) | High | bouncycastle: negative signed leaf_index values from unsigned wire encodings can cause heap exhaustion | 7.5 | 0.0042 |  |
| [CVE-2026-17508](https://patchblox.com/security/data/cve/CVE-2026-17508.md) | Routine | bouncycastle: unbounded KDF iteration and memory parameters can cause resource exhaustion (bsc#1284073). | n/a | 0.0042 |  |
| [CVE-2026-18036](https://patchblox.com/security/data/cve/CVE-2026-18036.md) | Routine | bouncycastle: variable-time modulo and division operations in NTRU implementation can allow timing side-channel | n/a | 0.0028 |  |
| [CVE-2026-97873](https://patchblox.com/security/data/cve/CVE-2026-97873.md) | Routine | bouncycastle: unbounded iteration counts in legacy PBES1 and PKCS#12 PBE implementations can cause resource | n/a | 0.0026 |  |
| [CVE-2026-71890](https://patchblox.com/security/data/cve/CVE-2026-71890.md) | Routine | bouncycastle: unbounded Remove proposals in external MLS commits can cause arbitrary group member eviction and | n/a | 0.0025 |  |
| [CVE-2026-71885](https://patchblox.com/security/data/cve/CVE-2026-71885.md) | Routine | bouncycastle: unbound X.509 certificates in MLS LeafNode verification can cause identity impersonation and group | n/a | 0.0020 |  |
| [CVE-2026-71891](https://patchblox.com/security/data/cve/CVE-2026-71891.md) | Routine | bouncycastle: forged ECPoint curves in BLS12-381 key validation can cause aggregate signature verification bypasses | n/a | 0.0017 |  |
| [CVE-2026-71892](https://patchblox.com/security/data/cve/CVE-2026-71892.md) | Routine | bouncycastle: type mismatch in CMS key-transport validation can cause key-size enforcement bypasses for HKDF-derived | n/a | 0.0017 |  |
| [CVE-2026-71886](https://patchblox.com/security/data/cve/CVE-2026-71886.md) | Routine | bouncycastle: unvalidated CERTIFY_OTHER flags in OpenPGP subkeys can cause unauthorized trust delegations and | n/a | 0.0017 |  |
| [CVE-2026-71889](https://patchblox.com/security/data/cve/CVE-2026-71889.md) | Routine | bouncycastle: skipped leaf certificate evaluation in checkNameConstraints can cause X.509 name constraint bypasses | n/a | 0.0017 |  |
| [CVE-2026-85515](https://patchblox.com/security/data/cve/CVE-2026-85515.md) | Routine | bouncycastle: laundered EOF exceptions in OpenPGP message stream processing can cause unregistered truncation errors | n/a | 0.0016 |  |
| [CVE-2026-71888](https://patchblox.com/security/data/cve/CVE-2026-71888.md) | Routine | bouncycastle: disagreement between digestAlgorithm and authAttrs in CMS parsing can cause unauthenticated attribute | n/a | 0.0011 |  |
| [CVE-2026-18040](https://patchblox.com/security/data/cve/CVE-2026-18040.md) | Routine | bouncycastle: table lookups and variable-time duplicate scanning in HQC can cause cache side-channel leaks | n/a | 0.0011 |  |
| [CVE-2026-71887](https://patchblox.com/security/data/cve/CVE-2026-71887.md) | Routine | bouncycastle: missing primary key back-signature validation on subkeys can cause signature misattribution and trust | n/a | 0.0009 |  |

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Data as of 2026-11-11T13:47:35Z 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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