SUSE SLES15 Security Update : libssh (SUSE-SU-2026:3463-1)

The remote SUSE Linux SLES15 / SLESSAP15 host has packages installed that are affected by multiple vulnerabilities as referenced in the SUSE-SU-2026:3463-1 advisory. - CVE-2026-59843: denial of service via zero advertised channel packet size bsc1272164. - CVE-2026-59844: denial of service via...

JLSEC-2026-1144 Issue summary: The implementations of AES-SIV (RFC 5297) and AES-GCM-SIV (RFC 8452) mishandle the...

Issue summary: The implementations of AES-SIV RFC 5297 and AES-GCM-SIV RFC 8452 mishandle the authentication of AAD Additional Authenticated Data with an empty ciphertext allowing a forgery of such messages. Impact summary: An attacker can forge empty messages with arbitrary AAD to the victim's...

PT-2026-76181

Issue summary: The implementations of AES-SIV RFC 5297 and AES-GCM-SIV RFC 8452 mishandle the authentication of AAD Additional Authenticated Data with an empty ciphertext allowing a forgery of such messages. Impact summary: An attacker can forge empty messages with arbitrary AAD to the victim's...

JLSEC-2026-1084 CMS (Cryptographic Message Syntax) parsing in gpgsm in GnuPG through 2.5.20 mishandles the CMS...

CMS Cryptographic Message Syntax parsing in gpgsm in GnuPG through 2.5.20 mishandles the CMS format for AES-GCM because aes-ICVlen is supposed to be 12 bytes but 4 bytes is accepted. NOTE: this is related to CVE-2026-34182...

PT-2026-76125

libssh2 through 1.11.1, fixed in commit a2ed82d, contains a pre-authentication integer underflow vulnerability in the ssh2 cipher crypt function in src/openssl.c that allows a malicious SSH server to crash any connecting client by negotiating AES-GCM ciphers during handshake. Attackers can exploi...

SUSE SLES12 Security Update : libssh (SUSE-SU-2026:3302-1)

The remote SUSE Linux SLES12 host has packages installed that are affected by multiple vulnerabilities as referenced in the SUSE-SU-2026:3302-1 advisory. This update for libssh fixes the following issues - CVE-2026-3731: denial of service via out-of-bounds read in SFTP extension name handler...

SUSE CVE-2026-66033

libssh2 through 1.11.1, fixed in commit a2ed82d, contains a pre-authentication integer underflow vulnerability in the ssh2ciphercrypt function in src/openssl.c that allows a malicious SSH server to crash any connecting client by negotiating AES-GCM ciphers during handshake. Attackers can exploit...

SUSE-SU-2026:3330-1 Security update for libssh

This update for libssh fixes the following issues: - CVE-2026-59843: denial of service via zero advertised channel packet size bsc1272164. - CVE-2026-59844: denial of service via oversized SFTP read length bsc1272165. - CVE-2026-59845: denial of service via unchecked ProxyCommand fork failure...

SUSE-SU-2026:23007-1 Security update for gpg2

This update for gpg2 fixes the following issue: - CVE-2026-57062: CMS parsing in gpgsm mishandles the CMS format for AES-GCM bsc1269279...

SUSE SLED15 / SLES15 Security Update : gpg2 (SUSE-SU-2026:3243-1)

The remote SUSE Linux SLED15 / SLEDSAP15 / SLES15 / SLESSAP15 host has packages installed that are affected by a vulnerability as referenced in the SUSE-SU-2026:3243-1 advisory. This update for gpg2 fixes the following issue: - CVE-2026-57062: CMS parsing in gpgsm mishandles the CMS format for...

Stack buffer overflow in CMS AuthEnvelopedData parsing in DR

Issue summary: Parsing CMS AuthEnvelopedData or EnvelopedData message with maliciously crafted AEAD parameters can trigger a stack buffer overflow. Impact summary: A stack buffer overflow may lead to a crash, causing Denial of Service, or potentially remote code execution. When parsing CMS...

libssh2: libssh2: Denial of Service via integer underflow in AES-GCM cipher negotiation

A flaw was found in libssh2. A pre-authentication integer underflow vulnerability exists in the ssh2ciphercrypt function when negotiating AES-GCM ciphers during the handshake. A malicious SSH server can exploit this to trigger an out-of-bounds read and a memory copy operation with an extremely...

Security update for libssh

This update for libssh fixes the following issues: CVE-2026-3731: denial of service via out-of-bounds read in SFTP extension name handler bsc1259377. CVE-2026-59843: denial of service via zero advertised channel packet size bsc1272164. CVE-2026-59844: denial of service via oversized SFTP read...

libssh2 Integer Underflow DoS via AES-GCM Cipher Negotiation

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Libssh: libssh: integrity downgrade via openssl aes-gcm tag verification

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Linux Distros Unpatched Vulnerability : CVE-2026-66033

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available. - libssh2 through 1.11.1, fixed in commit a2ed82d, contains a pre-authentication integer underflow vulnerability in the ssh2ciphercrypt function in src/openssl.c...

AZL-93402 CVE-2026-66033 affecting package libssh2 for versions less than 1.11.1-5

libssh2 through 1.11.1, fixed in commit a2ed82d, contains a pre-authentication integer underflow vulnerability in the ssh2ciphercrypt function in src/openssl.c that allows a malicious SSH server to crash any connecting client by negotiating AES-GCM ciphers during handshake. Attackers can exploit...

CVE-2026-66033

libssh2 through 1.11.1, fixed in commit a2ed82d, contains a pre-authentication integer underflow vulnerability in the ssh2ciphercrypt function in src/openssl.c that allows a malicious SSH server to crash any connecting client by negotiating AES-GCM ciphers during handshake. Attackers can exploit...

AZL-97428 CVE-2026-66033 affecting package rust for versions less than 1.96.1-2

libssh2 through 1.11.1, fixed in commit a2ed82d, contains a pre-authentication integer underflow vulnerability in the ssh2ciphercrypt function in src/openssl.c that allows a malicious SSH server to crash any connecting client by negotiating AES-GCM ciphers during handshake. Attackers can exploit...

UBUNTU-CVE-2026-66033

libssh2 through 1.11.1, fixed in commit a2ed82d, contains a pre-authentication integer underflow vulnerability in the ssh2ciphercrypt function in src/openssl.c that allows a malicious SSH server to crash any connecting client by negotiating AES-GCM ciphers during handshake. Attackers can exploit...