USN-7980-2: OpenSSL vulnerabilities

USN-7980-2 fixed vulnerabilities in OpenSSL. This update provides the
corresponding updates for CVE-2025-68160 for openssl and openssl1.0,
CVE-2025-69418 for openssl on Ubuntu 18.04 LTS and Ubuntu 20.04 LTS,
CVE-2025-69419 for openssl on Ubuntu 18.04 LTS and Ubuntu 20.04 LTS,
CVE-2025-69420 for openssl on Ubuntu 18.04 LTS and Ubuntu 20.04 LTS,
CVE-2025-69421 for openssl and openssl1.0, CVE-2026-22795 for openssl on
Ubuntu 18.04 LTS and Ubuntu 20.04 LTS, and CVE-2026-22796 for openssl and
openssl1.0.

Original advisory details:

Stanislav Fort, Petr Šimeček, and Hamza discovered that OpenSSL
incorrectly validated PBMAC1 parameters when doing PKCS#12 MAC
verification. An attacker could possibly use this issue to cause OpenSSL
to crash, resulting in a denial of service. This issue only affected
Ubuntu 25.10. (CVE-2025-11187)

Stanislav Fort discovered that OpenSSL incorrectly parsed CMS
AuthEnvelopedData messages. An attacker could possibly use this issue to
cause OpenSSL to crash, resulting in a denial of service. (CVE-2025-15467)

Stanislav Fort discovered that OpenSSL incorrectly handled memory in the
SSL_CIPHER_find() function. An attacker could possibly use this issue to
cause OpenSSL to crash, resulting in a denial of service. This issue only
affected Ubuntu 25.10. (CVE-2025-15468)

Stanislav Fort discovered that the OpenSSL "openssl dgst" command line
tool incorrectly truncated data to 16MB. An attacker could posibly use
this issue to hide unauthenticated data beyond the 16MB limit. This issue
only affected Ubuntu 25.10. (CVE-2025-15469)

Tomas Dulka and Stanislav Fort discovered that OpenSSL incorrectly handled
memory with TLS 1.3 connections using certificate compression. An attacker
could possibly use this issue to consume resources, leading to a denial of
service. This issue only affected Ubuntu 25.10. (CVE-2025-66199)

Petr Simecek and Stanislav Fort discovered that OpenSSL incorrectly
handled memory when writing large data into a BIO chain. An attacker could
possibly use this issue to consume resources, leading to a denial of
service. (CVE-2025-68160)

Stanislav Fort discovered that the OpenSSL OCB API could incorrectly leave
final partial blocks unencrypted and unauthenticated. An attacker could
possibly use this issue to read or tamper with the affected final bytes.
(CVE-2025-69418)

Stanislav Fort discovered that OpenSSL incorrectly handled the
PKCS12_get_friendlyname() utf-8 conversion. An attacker could possibly use
this issue to cause OpenSSL to crash, resulting in a denial of service.
(CVE-2025-69419)

Luigino Camastra discovered that OpenSSL incorrectly handled ASN1_TYPE
validation in the TS_RESP_verify_response() function. An attacker could
possibly use this issue to cause OpenSSL to crash, resulting in a denial
of service. (CVE-2025-69420)

Luigino Camastra discovered that OpenSSL incorrectly handled memory in the
PKCS12_item_decrypt_d2i_ex function. An attacker could possibly use this
issue to cause OpenSSL to crash, resulting in a denial of service.
(CVE-2025-69421)

Luigino Camastra discovered that OpenSSL incorrectly handled ASN1_TYPE
validation in PKCS#12 parsing. An attacker could possibly use this issue
to cause OpenSSL to crash, resulting in a denial of service.
(CVE-2026-22795)

Luigino Camastra discovered that OpenSSL incorrectly handled ASN1_TYPE
validation in the PKCS7_digest_from_attributes() function. An attacker
could possibly use this issue to cause OpenSSL to crash, resulting in a
denial of service. (CVE-2026-22796)