# RHSA-2026:25237: openssl security update

RHSA-2026:25237, released June 24, 2026, fixes 11 CVEs in openssl (version 3.5.5-4.el10_2). None of them is reported as exploited. Patch Radar priority: High.

- Web page: https://patchblox.com/security/fix/linux/rhsa-2026-25237
- Platform: Linux
- Released: Jun 24, 2026
- Priority: High (Closes CVE-2026-42764, high severity)
- CVEs: 11, exploited: 0, on CISA KEV: 0
- Vendor advisory: https://access.redhat.com/errata/RHSA-2026:25237

## Applies to

| Product | Release | Fixed in |
|---|---|---|
| [openssl](https://patchblox.com/security/data/product/linux/openssl.md) | RHEL 10 | 3.5.5-4.el10_2 |

## CVEs this fix closes

| CVE | Priority | Title | CVSS | EPSS | Exploitation |
|---|---|---|---:|---:|---|
| [CVE-2026-42764](https://patchblox.com/security/data/cve/CVE-2026-42764.md) | High | openssl: Issue summary: Receiving a QUIC initial packet with an invalid token may trigger a NULL pointer dereference in the Op... | 9.1 | 0.0117 |  |
| [CVE-2026-42766](https://patchblox.com/security/data/cve/CVE-2026-42766.md) | High | Possible NULL Dereference in Password-Based CMS Decryption | 9.1 | 0.0106 |  |
| [CVE-2026-34180](https://patchblox.com/security/data/cve/CVE-2026-34180.md) | High | Heap Buffer Over-read in ASN.1 Content Parsing | 9.1 | 0.0103 |  |
| [CVE-2026-7383](https://patchblox.com/security/data/cve/CVE-2026-7383.md) | High | Possible Heap Buffer Overflow in ASN.1 Multibyte String Conversion | 9.1 | 0.0080 |  |
| [CVE-2026-42768](https://patchblox.com/security/data/cve/CVE-2026-42768.md) | High | Multi-RecipientInfo Bleichenbacher Oracle in CMS_decrypt() and PKCS7_decrypt() | 9.1 | 0.0080 |  |
| [CVE-2026-9076](https://patchblox.com/security/data/cve/CVE-2026-9076.md) | High | Out-of-Bounds Read in CMS Password-Based Decryption | 9.1 | 0.0071 |  |
| [CVE-2026-42767](https://patchblox.com/security/data/cve/CVE-2026-42767.md) | High | NULL Pointer Dereference in CRMF EncryptedValue Decryption | 9.1 | 0.0056 |  |
| [CVE-2026-42769](https://patchblox.com/security/data/cve/CVE-2026-42769.md) | High | openssl: Issue Summary: An error in the callback used to verify the certificate provided in a Root CA key update Certificate M... | 9.1 | 0.0054 |  |
| [CVE-2026-42770](https://patchblox.com/security/data/cve/CVE-2026-42770.md) | High | openssl: Issue summary: When EVP_PKEY_derive_set_peer() is called with a DHX (X9.42) peer key, the peer key is not properly ch... | 9.1 | 0.0050 |  |
| [CVE-2026-45446](https://patchblox.com/security/data/cve/CVE-2026-45446.md) | High | Incorrect Tag Processing for Empty Messages in AES-GCM-SIV and AES-SIV modes | 9.1 | 0.0044 |  |
| [CVE-2026-34181](https://patchblox.com/security/data/cve/CVE-2026-34181.md) | High | PKCS#12 Files with PBMAC1 Are Accepted with Short HMAC Keys | 9.1 | 0.0038 |  |

---

Data as of 2026-11-09T07:25:28Z 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

Free to use with attribution: show "Data: Patchblox Patch Radar" with a link to https://patchblox.com/security/patch-radar. Terms, including what needs a written agreement: https://patchblox.com/security/patch-radar/use-the-data

Product names, logos and trademarks shown on Patch Radar belong to their respective owners. They are used only to identify the software each security fix applies to and to help readers find their platform. Their use does not imply any affiliation with, or endorsement by, those owners, and Patchblox is not affiliated with any of them.