========================================================================== Ubuntu Security Notice USN-8414-1 June 09, 2026
openssl vulnerabilities ========================================================================== A security issue affects these releases of Ubuntu and its derivatives: - Ubuntu 26.04 LTS - Ubuntu 25.10 - Ubuntu 24.04 LTS - Ubuntu 22.04 LTS Summary: Several security issues were fixed in OpenSSL. Software Description: - openssl: Secure Socket Layer (SSL) cryptographic library and tools Details: Frank Buss discovered that OpenSSL had a heap buffer over-read in ASN.1 content parsing. An attacker could possibly use this issue to cause OpenSSL to crash, resulting in a denial of service, or obtain sensitive information. (CVE-2026-34180) Pavol Zacik and Alex Gaynor discovered that OpenSSL incorrectly accepted PKCS#12 files with short HMAC keys when using PBMAC1. An attacker could possibly use this issue to bypass integrity checks. This issue only affected Ubuntu 25.10 and Ubuntu 26.04 LTS. (CVE-2026-34181) Asim Viladi Oglu Manizada and Alex Gaynor discovered that OpenSSL could accept forged CMS AuthEnvelopedData messages. An attacker could possibly use this issue to bypass message authentication checks. (CVE-2026-34182) Abhinav Agarwal discovered that OpenSSL had unbounded memory growth in the QUIC PATH_CHALLENGE handler. A remote attacker could possibly use this issue to cause OpenSSL to use excessive resources, leading to a denial of service. This issue only affected Ubuntu 25.10 and Ubuntu 26.04 LTS. (CVE-2026-34183) Sunwoo Lee, Hyuk Lim, and Seunghyun Yoon discovered that OpenSSL had a NULL pointer dereference in QUIC server initial packet handling. A remote attacker could possibly use this issue to cause OpenSSL to crash, resulting in a denial of service. This issue only affected Ubuntu 25.10 and Ubuntu 26.04 LTS. (CVE-2026-42764) Mayank Jangid, Kushal Khemka, Hari Priandana, Bhabani Sankar Das, and Qifan Zhang discovered that OpenSSL had a possible NULL dereference in password- based CMS decryption. An attacker could possibly use this issue to cause OpenSSL to crash, resulting in a denial of service. (CVE-2026-42766) Zhanpeng Liu, Guannan Wang, and Guancheng Li discovered that OpenSSL had a NULL pointer dereference in CRMF EncryptedValue decryption. An attacker could possibly use this issue to cause OpenSSL to crash, resulting in a denial of service. (CVE-2026-42767) Alex Gaynor discovered that OpenSSL had a Bleichenbacher oracle in CMS_decrypt() and PKCS7_decrypt() with multiple RecipientInfo values. An attacker could possibly use this issue to obtain sensitive information. This issue only affected Ubuntu 25.10 and Ubuntu 26.04 LTS. (CVE-2026-42768) Alex Gaynor discovered that OpenSSL had a trust-anchor substitution issue in CMP rootCaKeyUpdate processing. An attacker could possibly use this issue to bypass certificate trust validation. This issue only affected Ubuntu 25.10 and Ubuntu 26.04 LTS. (CVE-2026-42769) Alex Gaynor discovered that OpenSSL used attacker-supplied parameters when validating FFC-DH peers. An attacker could possibly use this issue to weaken key validation and compromise security guarantees. (CVE-2026-42770) Alex Gaynor discovered that OpenSSL could ignore the IV in AES-OCB mode on the EVP_Cipher() path. An attacker could possibly use this issue to bypass cryptographic protections and obtain sensitive information. (CVE-2026-45445) Alex Gaynor discovered that OpenSSL had incorrect tag processing for empty messages in AES-GCM-SIV and AES-SIV modes. An attacker could possibly use this issue to bypass cryptographic integrity checks. (CVE-2026-45446) Thai Duong discovered that OpenSSL had a heap use-after-free in PKCS7_verify(). An attacker could possibly use this issue to cause OpenSSL to crash, resulting in a denial of service, or execute arbitrary code. (CVE-2026-45447) Zehua Qiao and Jinwen He discovered that OpenSSL had a possible heap buffer overflow in ASN.1 multibyte string conversion. An attacker could possibly use this issue to cause OpenSSL to crash, resulting in a denial of service, or execute arbitrary code. (CVE-2026-7383) Bhabani Sankar Das discovered that OpenSSL had an out-of-bounds read in CMS password-based decryption. An attacker could possibly use this issue to cause OpenSSL to crash, resulting in a denial of service. (CVE-2026-9076) Update instructions: The problem can be corrected by updating your system to the following package versions: Ubuntu 26.04 LTS libssl3t64 3.5.5-1ubuntu3.2 openssl 3.5.5-1ubuntu3.2 Ubuntu 25.10 libssl3t64 3.5.3-1ubuntu3.4 openssl 3.5.3-1ubuntu3.4 Ubuntu 24.04 LTS libssl3t64 3.0.13-0ubuntu3.11 openssl 3.0.13-0ubuntu3.11 Ubuntu 22.04 LTS libssl3 3.0.2-0ubuntu1.25 openssl 3.0.2-0ubuntu1.25 After a standard system update you need to reboot your computer to make all the necessary changes. References: https://ubuntu.com/security/notices/USN-8414-1 CVE-2026-34180, CVE-2026-34181, CVE-2026-34182, CVE-2026-34183, CVE-2026-42764, CVE-2026-42766, CVE-2026-42767, CVE-2026-42768, CVE-2026-42769, CVE-2026-42770, CVE-2026-45445, CVE-2026-45446, CVE-2026-45447, CVE-2026-7383, CVE-2026-9076 Package Information: https://launchpad.net/ubuntu/+source/openssl/3.5.5-1ubuntu3.2 https://launchpad.net/ubuntu/+source/openssl/3.5.3-1ubuntu3.4 https://launchpad.net/ubuntu/+source/openssl/3.0.13-0ubuntu3.11 https://launchpad.net/ubuntu/+source/openssl/3.0.2-0ubuntu1.25
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