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SUSE-SU-2026:23187-1

Vulnerability from csaf_suse - Published: 2026-08-17 16:37 - Updated: 2026-09-16 20:12
Summary
Security update for libssh2_org
Severity
Important
Notes
Title of the patch: Security update for libssh2_org
Description of the patch: This update for libssh2_org fixes the following issues: - CVE-2025-15661: out-of-bounds heap read vulnerability in the `sftp_symlink()` function in `src/sftp.c` (bsc#1268546). - CVE-2026-7598: integer overflow in function `userauth_password` of file `src/userauth.c` (bsc#1263890). - CVE-2026-55199: pre-authentication DoS via the `SSH_MSG_EXT_INFO` handler (bsc#1268530). - CVE-2026-58050: heap buffer overflow due to missing bounds check in attribute count of publickey-subsystem response (bsc#1269568). - CVE-2026-58051: uninitialized pointer freed when malformed responses are sent by an SSH server (bsc#1269567). - CVE-2026-66032: arbitrary code execution via double-free in SFTP session (bsc#1272737). - CVE-2026-66033: denial of service via integer underflow in AES-GCM cipher negotiation (bsc#1272736). - CVE-2026-66034: information disclosure and potential arbitrary code execution via heap out-of-bounds read (bsc#1272735). - CVE-2026-66035: arbitrary code execution via heap buffer overflow during SSH negotiation (bsc#1272734).
Patchnames: SUSE-SLE-Micro-6.1-672
Terms of use: CSAF 2.0 data is provided by SUSE under the Creative Commons License 4.0 with Attribution (CC-BY-4.0).
CVE-2025-15661
6.8 (Medium)
CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:N/A:H
Affected products
Product Identifier Version Remediation
Unresolved product id: SUSE Linux Micro 6.1:libssh2-1-1.11.0-slfo.1.1_2.1.aarch64 —
Vendor Fix
Unresolved product id: SUSE Linux Micro 6.1:libssh2-1-1.11.0-slfo.1.1_2.1.ppc64le —
Vendor Fix
Unresolved product id: SUSE Linux Micro 6.1:libssh2-1-1.11.0-slfo.1.1_2.1.s390x —
Vendor Fix
Unresolved product id: SUSE Linux Micro 6.1:libssh2-1-1.11.0-slfo.1.1_2.1.x86_64 —
Vendor Fix
Threats
Impact moderate
CVE-2026-55199
5.9 (Medium)
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
Affected products
Recommended 4 products, the same list as for CVE-2025-15661
Threats
Impact moderate
CVE-2026-58050
8.1 (High)
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
Affected products
Recommended 4 products, the same list as for CVE-2025-15661
Threats
Impact important
CVE-2026-58051
6.5 (Medium)
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:H
Affected products
Recommended 4 products, the same list as for CVE-2025-15661
Threats
Impact moderate
CVE-2026-66032
8.8 (High)
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Affected products
Recommended 4 products, the same list as for CVE-2025-15661
Threats
Impact important
CVE-2026-66033
7.5 (High)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Affected products
Recommended 4 products, the same list as for CVE-2025-15661
Threats
Impact important
CVE-2026-66034
7.5 (High)
CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H
Affected products
Recommended 4 products, the same list as for CVE-2025-15661
Threats
Impact important
CVE-2026-66035
7.5 (High)
CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H
Affected products
Recommended 4 products, the same list as for CVE-2025-15661
Threats
Impact important
CVE-2026-7598
7.3 (High)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L
Affected products
Recommended 4 products, the same list as for CVE-2025-15661
Threats
Impact important
References
URL Category
https://www.suse.com/support/security/rating/ external
https://ftp.suse.com/pub/projects/security/csaf/s… self
https://www.suse.com/support/update/announcement/… self
https://lists.suse.com/pipermail/sle-updates/2026… self
https://bugzilla.suse.com/1263890 self
https://bugzilla.suse.com/1268530 self
https://bugzilla.suse.com/1268546 self
https://bugzilla.suse.com/1269567 self
https://bugzilla.suse.com/1269568 self
https://bugzilla.suse.com/1272734 self
https://bugzilla.suse.com/1272735 self
https://bugzilla.suse.com/1272736 self
https://bugzilla.suse.com/1272737 self
https://www.suse.com/security/cve/CVE-2025-15661/ self
https://www.suse.com/security/cve/CVE-2026-55199/ self
https://www.suse.com/security/cve/CVE-2026-58050/ self
https://www.suse.com/security/cve/CVE-2026-58051/ self
https://www.suse.com/security/cve/CVE-2026-66032/ self
https://www.suse.com/security/cve/CVE-2026-66033/ self
https://www.suse.com/security/cve/CVE-2026-66034/ self
https://www.suse.com/security/cve/CVE-2026-66035/ self
https://www.suse.com/security/cve/CVE-2026-7598/ self
https://www.suse.com/security/cve/CVE-2025-15661 external
https://bugzilla.suse.com/1268546 external
https://www.suse.com/security/cve/CVE-2026-55199 external
https://bugzilla.suse.com/1268530 external
https://bugzilla.suse.com/1270343 external
https://www.suse.com/security/cve/CVE-2026-58050 external
https://bugzilla.suse.com/1269568 external
https://www.suse.com/security/cve/CVE-2026-58051 external
https://bugzilla.suse.com/1269567 external
https://www.suse.com/security/cve/CVE-2026-66032 external
https://bugzilla.suse.com/1272737 external
https://www.suse.com/security/cve/CVE-2026-66033 external
https://bugzilla.suse.com/1272736 external
https://www.suse.com/security/cve/CVE-2026-66034 external
https://bugzilla.suse.com/1272735 external
https://www.suse.com/security/cve/CVE-2026-66035 external
https://bugzilla.suse.com/1272734 external
https://www.suse.com/security/cve/CVE-2026-7598 external
https://bugzilla.suse.com/1263890 external
To clipboard 

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  "vulnerabilities": [
    {
      "cve": "CVE-2025-15661",
      "ids": [
        {
          "system_name": "SUSE CVE Page",
          "text": "https://www.suse.com/security/cve/CVE-2025-15661"
        }
      ],
      "notes": [
        {
          "category": "general",
          "text": "libssh2 through 1.11.1, fixed in commit 2dae302, contains an out-of-bounds heap read vulnerability in the sftp_symlink() function in src/sftp.c that allows a malicious SSH server or man-in-the-middle attacker to disclose heap memory contents or cause a crash by sending a crafted SSH_FXP_NAME response. Attackers can supply a link_len value larger than the actual packet data in SSH_FXP_NAME responses for SFTP READLINK and REALPATH operations, triggering a heap buffer over-read of up to target_len minus one bytes due to the missing validation of available packet buffer size before the memcpy operation.",
          "title": "CVE description"
        }
      ],
      "product_status": {
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          "SUSE Linux Micro 6.1:libssh2-1-1.11.0-slfo.1.1_2.1.aarch64",
          "SUSE Linux Micro 6.1:libssh2-1-1.11.0-slfo.1.1_2.1.ppc64le",
          "SUSE Linux Micro 6.1:libssh2-1-1.11.0-slfo.1.1_2.1.s390x",
          "SUSE Linux Micro 6.1:libssh2-1-1.11.0-slfo.1.1_2.1.x86_64"
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        {
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          "summary": "SUSE Bug 1268546 for CVE-2025-15661",
          "url": "https://bugzilla.suse.com/1268546"
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      ],
      "remediations": [
        {
          "category": "vendor_fix",
          "details": "To install this SUSE Security Update use the SUSE recommended installation methods like YaST online_update or \"zypper patch\".\n",
          "product_ids": [
            "SUSE Linux Micro 6.1:libssh2-1-1.11.0-slfo.1.1_2.1.aarch64",
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            "SUSE Linux Micro 6.1:libssh2-1-1.11.0-slfo.1.1_2.1.s390x",
            "SUSE Linux Micro 6.1:libssh2-1-1.11.0-slfo.1.1_2.1.x86_64"
          ]
        }
      ],
      "scores": [
        {
          "cvss_v3": {
            "baseScore": 6.8,
            "baseSeverity": "MEDIUM",
            "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:N/A:H",
            "version": "3.1"
          },
          "products": [
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            "SUSE Linux Micro 6.1:libssh2-1-1.11.0-slfo.1.1_2.1.ppc64le",
            "SUSE Linux Micro 6.1:libssh2-1-1.11.0-slfo.1.1_2.1.s390x",
            "SUSE Linux Micro 6.1:libssh2-1-1.11.0-slfo.1.1_2.1.x86_64"
          ]
        }
      ],
      "threats": [
        {
          "category": "impact",
          "date": "2026-08-17T16:37:24Z",
          "details": "moderate"
        }
      ],
      "title": "CVE-2025-15661"
    },
    {
      "cve": "CVE-2026-55199",
      "ids": [
        {
          "system_name": "SUSE CVE Page",
          "text": "https://www.suse.com/security/cve/CVE-2026-55199"
        }
      ],
      "notes": [
        {
          "category": "general",
          "text": "libssh2 through 1.11.1, fixed in commit 1762685, contains a pre-authentication denial of service vulnerability in the SSH_MSG_EXT_INFO handler in src/packet.c that allows a malicious SSH server to cause a client CPU exhaustion loop by sending a crafted extension count value. A malicious server can set nr_extensions to 0xFFFFFFFF during key exchange, causing the client to spin in a tight CPU loop for over 60 seconds because return values from _libssh2_get_string() are unchecked and the session timeout does not apply to CPU-bound loops.",
          "title": "CVE description"
        }
      ],
      "product_status": {
        "recommended": [
          "SUSE Linux Micro 6.1:libssh2-1-1.11.0-slfo.1.1_2.1.aarch64",
          "SUSE Linux Micro 6.1:libssh2-1-1.11.0-slfo.1.1_2.1.ppc64le",
          "SUSE Linux Micro 6.1:libssh2-1-1.11.0-slfo.1.1_2.1.s390x",
          "SUSE Linux Micro 6.1:libssh2-1-1.11.0-slfo.1.1_2.1.x86_64"
        ]
      },
      "references": [
        {
          "category": "external",
          "summary": "CVE-2026-55199",
          "url": "https://www.suse.com/security/cve/CVE-2026-55199"
        },
        {
          "category": "external",
          "summary": "SUSE Bug 1268530 for CVE-2026-55199",
          "url": "https://bugzilla.suse.com/1268530"
        },
        {
          "category": "external",
          "summary": "SUSE Bug 1270343 for CVE-2026-55199",
          "url": "https://bugzilla.suse.com/1270343"
        }
      ],
      "remediations": [
        {
          "category": "vendor_fix",
          "details": "To install this SUSE Security Update use the SUSE recommended installation methods like YaST online_update or \"zypper patch\".\n",
          "product_ids": [
            "SUSE Linux Micro 6.1:libssh2-1-1.11.0-slfo.1.1_2.1.aarch64",
            "SUSE Linux Micro 6.1:libssh2-1-1.11.0-slfo.1.1_2.1.ppc64le",
            "SUSE Linux Micro 6.1:libssh2-1-1.11.0-slfo.1.1_2.1.s390x",
            "SUSE Linux Micro 6.1:libssh2-1-1.11.0-slfo.1.1_2.1.x86_64"
          ]
        }
      ],
      "scores": [
        {
          "cvss_v3": {
            "baseScore": 5.9,
            "baseSeverity": "MEDIUM",
            "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H",
            "version": "3.1"
          },
          "products": [
            "SUSE Linux Micro 6.1:libssh2-1-1.11.0-slfo.1.1_2.1.aarch64",
            "SUSE Linux Micro 6.1:libssh2-1-1.11.0-slfo.1.1_2.1.ppc64le",
            "SUSE Linux Micro 6.1:libssh2-1-1.11.0-slfo.1.1_2.1.s390x",
            "SUSE Linux Micro 6.1:libssh2-1-1.11.0-slfo.1.1_2.1.x86_64"
          ]
        }
      ],
      "threats": [
        {
          "category": "impact",
          "date": "2026-08-17T16:37:24Z",
          "details": "moderate"
        }
      ],
      "title": "CVE-2026-55199"
    },
    {
      "cve": "CVE-2026-58050",
      "ids": [
        {
          "system_name": "SUSE CVE Page",
          "text": "https://www.suse.com/security/cve/CVE-2026-58050"
        }
      ],
      "notes": [
        {
          "category": "general",
          "text": "libssh2 through 1.11.1 reads an attacker-controlled 32-bit attribute count from a publickey-subsystem response and uses it in the allocation num_attrs * sizeof(libssh2_publickey_attribute) without bounds checking, so on 32-bit platforms the multiplication overflows to an undersized buffer. A malicious SSH server can then drive the attribute-parsing loop to write past the allocation, causing a heap buffer overflow in a connecting libssh2 client.",
          "title": "CVE description"
        }
      ],
      "product_status": {
        "recommended": [
          "SUSE Linux Micro 6.1:libssh2-1-1.11.0-slfo.1.1_2.1.aarch64",
          "SUSE Linux Micro 6.1:libssh2-1-1.11.0-slfo.1.1_2.1.ppc64le",
          "SUSE Linux Micro 6.1:libssh2-1-1.11.0-slfo.1.1_2.1.s390x",
          "SUSE Linux Micro 6.1:libssh2-1-1.11.0-slfo.1.1_2.1.x86_64"
        ]
      },
      "references": [
        {
          "category": "external",
          "summary": "CVE-2026-58050",
          "url": "https://www.suse.com/security/cve/CVE-2026-58050"
        },
        {
          "category": "external",
          "summary": "SUSE Bug 1269568 for CVE-2026-58050",
          "url": "https://bugzilla.suse.com/1269568"
        }
      ],
      "remediations": [
        {
          "category": "vendor_fix",
          "details": "To install this SUSE Security Update use the SUSE recommended installation methods like YaST online_update or \"zypper patch\".\n",
          "product_ids": [
            "SUSE Linux Micro 6.1:libssh2-1-1.11.0-slfo.1.1_2.1.aarch64",
            "SUSE Linux Micro 6.1:libssh2-1-1.11.0-slfo.1.1_2.1.ppc64le",
            "SUSE Linux Micro 6.1:libssh2-1-1.11.0-slfo.1.1_2.1.s390x",
            "SUSE Linux Micro 6.1:libssh2-1-1.11.0-slfo.1.1_2.1.x86_64"
          ]
        }
      ],
      "scores": [
        {
          "cvss_v3": {
            "baseScore": 8.1,
            "baseSeverity": "HIGH",
            "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H",
            "version": "3.1"
          },
          "products": [
            "SUSE Linux Micro 6.1:libssh2-1-1.11.0-slfo.1.1_2.1.aarch64",
            "SUSE Linux Micro 6.1:libssh2-1-1.11.0-slfo.1.1_2.1.ppc64le",
            "SUSE Linux Micro 6.1:libssh2-1-1.11.0-slfo.1.1_2.1.s390x",
            "SUSE Linux Micro 6.1:libssh2-1-1.11.0-slfo.1.1_2.1.x86_64"
          ]
        }
      ],
      "threats": [
        {
          "category": "impact",
          "date": "2026-08-17T16:37:24Z",
          "details": "important"
        }
      ],
      "title": "CVE-2026-58050"
    },
    {
      "cve": "CVE-2026-58051",
      "ids": [
        {
          "system_name": "SUSE CVE Page",
          "text": "https://www.suse.com/security/cve/CVE-2026-58051"
        }
      ],
      "notes": [
        {
          "category": "general",
          "text": "libssh2 through 1.11.1 grows its publickey list with SSH2_REALLOC but does not zero-initialize new entries before parsing populates them, so a parse failure reaching the cleanup path leaves libssh2_publickey_list_free operating on an uninitialized entry. A malicious SSH server offering the publickey subsystem can use a malformed response to make cleanup free an uninitialized, attacker-influenceable attrs pointer in a connecting libssh2 client.",
          "title": "CVE description"
        }
      ],
      "product_status": {
        "recommended": [
          "SUSE Linux Micro 6.1:libssh2-1-1.11.0-slfo.1.1_2.1.aarch64",
          "SUSE Linux Micro 6.1:libssh2-1-1.11.0-slfo.1.1_2.1.ppc64le",
          "SUSE Linux Micro 6.1:libssh2-1-1.11.0-slfo.1.1_2.1.s390x",
          "SUSE Linux Micro 6.1:libssh2-1-1.11.0-slfo.1.1_2.1.x86_64"
        ]
      },
      "references": [
        {
          "category": "external",
          "summary": "CVE-2026-58051",
          "url": "https://www.suse.com/security/cve/CVE-2026-58051"
        },
        {
          "category": "external",
          "summary": "SUSE Bug 1269567 for CVE-2026-58051",
          "url": "https://bugzilla.suse.com/1269567"
        }
      ],
      "remediations": [
        {
          "category": "vendor_fix",
          "details": "To install this SUSE Security Update use the SUSE recommended installation methods like YaST online_update or \"zypper patch\".\n",
          "product_ids": [
            "SUSE Linux Micro 6.1:libssh2-1-1.11.0-slfo.1.1_2.1.aarch64",
            "SUSE Linux Micro 6.1:libssh2-1-1.11.0-slfo.1.1_2.1.ppc64le",
            "SUSE Linux Micro 6.1:libssh2-1-1.11.0-slfo.1.1_2.1.s390x",
            "SUSE Linux Micro 6.1:libssh2-1-1.11.0-slfo.1.1_2.1.x86_64"
          ]
        }
      ],
      "scores": [
        {
          "cvss_v3": {
            "baseScore": 6.5,
            "baseSeverity": "MEDIUM",
            "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:H",
            "version": "3.1"
          },
          "products": [
            "SUSE Linux Micro 6.1:libssh2-1-1.11.0-slfo.1.1_2.1.aarch64",
            "SUSE Linux Micro 6.1:libssh2-1-1.11.0-slfo.1.1_2.1.ppc64le",
            "SUSE Linux Micro 6.1:libssh2-1-1.11.0-slfo.1.1_2.1.s390x",
            "SUSE Linux Micro 6.1:libssh2-1-1.11.0-slfo.1.1_2.1.x86_64"
          ]
        }
      ],
      "threats": [
        {
          "category": "impact",
          "date": "2026-08-17T16:37:24Z",
          "details": "moderate"
        }
      ],
      "title": "CVE-2026-58051"
    },
    {
      "cve": "CVE-2026-66032",
      "ids": [
        {
          "system_name": "SUSE CVE Page",
          "text": "https://www.suse.com/security/cve/CVE-2026-66032"
        }
      ],
      "notes": [
        {
          "category": "general",
          "text": "libssh2 through 1.11.1, fixed in commit 5e47761, contains a double-free vulnerability in the sftp_open() function in src/sftp.c that allows a malicious SSH server to corrupt the heap of any authenticated client opening an SFTP session. When a server responds to SSH_FXP_OPEN with SSH_FXP_STATUS containing FX_OK, the response data buffer is freed, and if a subsequent sftp_packet_require() call returns a specific error such as LIBSSH2_ERROR_CHANNEL_PACKET_EXCEEDED, the same pointer is freed a second time, enabling tcache dup conditions on glibc systems that allow overlapping allocations and function pointer overwrites.",
          "title": "CVE description"
        }
      ],
      "product_status": {
        "recommended": [
          "SUSE Linux Micro 6.1:libssh2-1-1.11.0-slfo.1.1_2.1.aarch64",
          "SUSE Linux Micro 6.1:libssh2-1-1.11.0-slfo.1.1_2.1.ppc64le",
          "SUSE Linux Micro 6.1:libssh2-1-1.11.0-slfo.1.1_2.1.s390x",
          "SUSE Linux Micro 6.1:libssh2-1-1.11.0-slfo.1.1_2.1.x86_64"
        ]
      },
      "references": [
        {
          "category": "external",
          "summary": "CVE-2026-66032",
          "url": "https://www.suse.com/security/cve/CVE-2026-66032"
        },
        {
          "category": "external",
          "summary": "SUSE Bug 1272737 for CVE-2026-66032",
          "url": "https://bugzilla.suse.com/1272737"
        }
      ],
      "remediations": [
        {
          "category": "vendor_fix",
          "details": "To install this SUSE Security Update use the SUSE recommended installation methods like YaST online_update or \"zypper patch\".\n",
          "product_ids": [
            "SUSE Linux Micro 6.1:libssh2-1-1.11.0-slfo.1.1_2.1.aarch64",
            "SUSE Linux Micro 6.1:libssh2-1-1.11.0-slfo.1.1_2.1.ppc64le",
            "SUSE Linux Micro 6.1:libssh2-1-1.11.0-slfo.1.1_2.1.s390x",
            "SUSE Linux Micro 6.1:libssh2-1-1.11.0-slfo.1.1_2.1.x86_64"
          ]
        }
      ],
      "scores": [
        {
          "cvss_v3": {
            "baseScore": 8.8,
            "baseSeverity": "HIGH",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H",
            "version": "3.1"
          },
          "products": [
            "SUSE Linux Micro 6.1:libssh2-1-1.11.0-slfo.1.1_2.1.aarch64",
            "SUSE Linux Micro 6.1:libssh2-1-1.11.0-slfo.1.1_2.1.ppc64le",
            "SUSE Linux Micro 6.1:libssh2-1-1.11.0-slfo.1.1_2.1.s390x",
            "SUSE Linux Micro 6.1:libssh2-1-1.11.0-slfo.1.1_2.1.x86_64"
          ]
        }
      ],
      "threats": [
        {
          "category": "impact",
          "date": "2026-08-17T16:37:24Z",
          "details": "important"
        }
      ],
      "title": "CVE-2026-66032"
    },
    {
      "cve": "CVE-2026-66033",
      "ids": [
        {
          "system_name": "SUSE CVE Page",
          "text": "https://www.suse.com/security/cve/CVE-2026-66033"
        }
      ],
      "notes": [
        {
          "category": "general",
          "text": "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 exploit the underflow in the expression computing blocksize minus aadlen minus authentication tag length to trigger an out-of-bounds read and a memcpy call with a near-SIZE_MAX length argument, causing immediate process crash before any authentication occurs.",
          "title": "CVE description"
        }
      ],
      "product_status": {
        "recommended": [
          "SUSE Linux Micro 6.1:libssh2-1-1.11.0-slfo.1.1_2.1.aarch64",
          "SUSE Linux Micro 6.1:libssh2-1-1.11.0-slfo.1.1_2.1.ppc64le",
          "SUSE Linux Micro 6.1:libssh2-1-1.11.0-slfo.1.1_2.1.s390x",
          "SUSE Linux Micro 6.1:libssh2-1-1.11.0-slfo.1.1_2.1.x86_64"
        ]
      },
      "references": [
        {
          "category": "external",
          "summary": "CVE-2026-66033",
          "url": "https://www.suse.com/security/cve/CVE-2026-66033"
        },
        {
          "category": "external",
          "summary": "SUSE Bug 1272736 for CVE-2026-66033",
          "url": "https://bugzilla.suse.com/1272736"
        }
      ],
      "remediations": [
        {
          "category": "vendor_fix",
          "details": "To install this SUSE Security Update use the SUSE recommended installation methods like YaST online_update or \"zypper patch\".\n",
          "product_ids": [
            "SUSE Linux Micro 6.1:libssh2-1-1.11.0-slfo.1.1_2.1.aarch64",
            "SUSE Linux Micro 6.1:libssh2-1-1.11.0-slfo.1.1_2.1.ppc64le",
            "SUSE Linux Micro 6.1:libssh2-1-1.11.0-slfo.1.1_2.1.s390x",
            "SUSE Linux Micro 6.1:libssh2-1-1.11.0-slfo.1.1_2.1.x86_64"
          ]
        }
      ],
      "scores": [
        {
          "cvss_v3": {
            "baseScore": 7.5,
            "baseSeverity": "HIGH",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
            "version": "3.1"
          },
          "products": [
            "SUSE Linux Micro 6.1:libssh2-1-1.11.0-slfo.1.1_2.1.aarch64",
            "SUSE Linux Micro 6.1:libssh2-1-1.11.0-slfo.1.1_2.1.ppc64le",
            "SUSE Linux Micro 6.1:libssh2-1-1.11.0-slfo.1.1_2.1.s390x",
            "SUSE Linux Micro 6.1:libssh2-1-1.11.0-slfo.1.1_2.1.x86_64"
          ]
        }
      ],
      "threats": [
        {
          "category": "impact",
          "date": "2026-08-17T16:37:24Z",
          "details": "important"
        }
      ],
      "title": "CVE-2026-66033"
    },
    {
      "cve": "CVE-2026-66034",
      "ids": [
        {
          "system_name": "SUSE CVE Page",
          "text": "https://www.suse.com/security/cve/CVE-2026-66034"
        }
      ],
      "notes": [
        {
          "category": "general",
          "text": "libssh2 through 1.11.1, fixed in commit a13bb6c, contains a missing bounds check vulnerability that allows a malicious SSH server to trigger an arbitrary-length heap out-of-bounds read and a free of an uninitialized pointer via the publickey subsystem. In libssh2_publickey_list_fetch(), the version 1 response parser reads a server-controlled comment_len value and advances the parse pointer without verifying sufficient bytes remain in the buffer, causing the out-of-bounds read to leak heap pointers from adjacent allocations defeating ASLR, followed by heap allocator state corruption when the error cleanup path frees an uninitialized pointer from a non-zeroed realloc() region.",
          "title": "CVE description"
        }
      ],
      "product_status": {
        "recommended": [
          "SUSE Linux Micro 6.1:libssh2-1-1.11.0-slfo.1.1_2.1.aarch64",
          "SUSE Linux Micro 6.1:libssh2-1-1.11.0-slfo.1.1_2.1.ppc64le",
          "SUSE Linux Micro 6.1:libssh2-1-1.11.0-slfo.1.1_2.1.s390x",
          "SUSE Linux Micro 6.1:libssh2-1-1.11.0-slfo.1.1_2.1.x86_64"
        ]
      },
      "references": [
        {
          "category": "external",
          "summary": "CVE-2026-66034",
          "url": "https://www.suse.com/security/cve/CVE-2026-66034"
        },
        {
          "category": "external",
          "summary": "SUSE Bug 1272735 for CVE-2026-66034",
          "url": "https://bugzilla.suse.com/1272735"
        }
      ],
      "remediations": [
        {
          "category": "vendor_fix",
          "details": "To install this SUSE Security Update use the SUSE recommended installation methods like YaST online_update or \"zypper patch\".\n",
          "product_ids": [
            "SUSE Linux Micro 6.1:libssh2-1-1.11.0-slfo.1.1_2.1.aarch64",
            "SUSE Linux Micro 6.1:libssh2-1-1.11.0-slfo.1.1_2.1.ppc64le",
            "SUSE Linux Micro 6.1:libssh2-1-1.11.0-slfo.1.1_2.1.s390x",
            "SUSE Linux Micro 6.1:libssh2-1-1.11.0-slfo.1.1_2.1.x86_64"
          ]
        }
      ],
      "scores": [
        {
          "cvss_v3": {
            "baseScore": 7.5,
            "baseSeverity": "HIGH",
            "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H",
            "version": "3.1"
          },
          "products": [
            "SUSE Linux Micro 6.1:libssh2-1-1.11.0-slfo.1.1_2.1.aarch64",
            "SUSE Linux Micro 6.1:libssh2-1-1.11.0-slfo.1.1_2.1.ppc64le",
            "SUSE Linux Micro 6.1:libssh2-1-1.11.0-slfo.1.1_2.1.s390x",
            "SUSE Linux Micro 6.1:libssh2-1-1.11.0-slfo.1.1_2.1.x86_64"
          ]
        }
      ],
      "threats": [
        {
          "category": "impact",
          "date": "2026-08-17T16:37:24Z",
          "details": "important"
        }
      ],
      "title": "CVE-2026-66034"
    },
    {
      "cve": "CVE-2026-66035",
      "ids": [
        {
          "system_name": "SUSE CVE Page",
          "text": "https://www.suse.com/security/cve/CVE-2026-66035"
        }
      ],
      "notes": [
        {
          "category": "general",
          "text": "libssh2 through 1.11.1, fixed in commit 42e33d8, contains a pre-authentication heap buffer overflow vulnerability that allows a malicious SSH server to corrupt heap metadata in any connecting client by sending a packet with a packet_length smaller than the cipher\u0027s block size during Encrypt-then-MAC cipher negotiation. In the fullpacket() function in src/transport.c, the ETM path allocates a buffer of packet_length bytes but copies blocksize minus one bytes via memcpy, causing an overflow that on 32-bit glibc writes attacker-controlled bytes into an adjacent chunk\u0027s SIZE field, enabling tcache bin confusion, overlapping live objects, and function pointer overwrite during the session handshake before authentication.",
          "title": "CVE description"
        }
      ],
      "product_status": {
        "recommended": [
          "SUSE Linux Micro 6.1:libssh2-1-1.11.0-slfo.1.1_2.1.aarch64",
          "SUSE Linux Micro 6.1:libssh2-1-1.11.0-slfo.1.1_2.1.ppc64le",
          "SUSE Linux Micro 6.1:libssh2-1-1.11.0-slfo.1.1_2.1.s390x",
          "SUSE Linux Micro 6.1:libssh2-1-1.11.0-slfo.1.1_2.1.x86_64"
        ]
      },
      "references": [
        {
          "category": "external",
          "summary": "CVE-2026-66035",
          "url": "https://www.suse.com/security/cve/CVE-2026-66035"
        },
        {
          "category": "external",
          "summary": "SUSE Bug 1272734 for CVE-2026-66035",
          "url": "https://bugzilla.suse.com/1272734"
        }
      ],
      "remediations": [
        {
          "category": "vendor_fix",
          "details": "To install this SUSE Security Update use the SUSE recommended installation methods like YaST online_update or \"zypper patch\".\n",
          "product_ids": [
            "SUSE Linux Micro 6.1:libssh2-1-1.11.0-slfo.1.1_2.1.aarch64",
            "SUSE Linux Micro 6.1:libssh2-1-1.11.0-slfo.1.1_2.1.ppc64le",
            "SUSE Linux Micro 6.1:libssh2-1-1.11.0-slfo.1.1_2.1.s390x",
            "SUSE Linux Micro 6.1:libssh2-1-1.11.0-slfo.1.1_2.1.x86_64"
          ]
        }
      ],
      "scores": [
        {
          "cvss_v3": {
            "baseScore": 7.5,
            "baseSeverity": "HIGH",
            "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H",
            "version": "3.1"
          },
          "products": [
            "SUSE Linux Micro 6.1:libssh2-1-1.11.0-slfo.1.1_2.1.aarch64",
            "SUSE Linux Micro 6.1:libssh2-1-1.11.0-slfo.1.1_2.1.ppc64le",
            "SUSE Linux Micro 6.1:libssh2-1-1.11.0-slfo.1.1_2.1.s390x",
            "SUSE Linux Micro 6.1:libssh2-1-1.11.0-slfo.1.1_2.1.x86_64"
          ]
        }
      ],
      "threats": [
        {
          "category": "impact",
          "date": "2026-08-17T16:37:24Z",
          "details": "important"
        }
      ],
      "title": "CVE-2026-66035"
    },
    {
      "cve": "CVE-2026-7598",
      "ids": [
        {
          "system_name": "SUSE CVE Page",
          "text": "https://www.suse.com/security/cve/CVE-2026-7598"
        }
      ],
      "notes": [
        {
          "category": "general",
          "text": "A security vulnerability has been detected in libssh2 up to 1.11.1. The impacted element is the function userauth_password of the file src/userauth.c. Such manipulation of the argument username_len/password_len leads to integer overflow. The attack may be launched remotely. The name of the patch is 256d04b60d80bf1190e96b0ad1e91b2174d744b1. A patch should be applied to remediate this issue.",
          "title": "CVE description"
        }
      ],
      "product_status": {
        "recommended": [
          "SUSE Linux Micro 6.1:libssh2-1-1.11.0-slfo.1.1_2.1.aarch64",
          "SUSE Linux Micro 6.1:libssh2-1-1.11.0-slfo.1.1_2.1.ppc64le",
          "SUSE Linux Micro 6.1:libssh2-1-1.11.0-slfo.1.1_2.1.s390x",
          "SUSE Linux Micro 6.1:libssh2-1-1.11.0-slfo.1.1_2.1.x86_64"
        ]
      },
      "references": [
        {
          "category": "external",
          "summary": "CVE-2026-7598",
          "url": "https://www.suse.com/security/cve/CVE-2026-7598"
        },
        {
          "category": "external",
          "summary": "SUSE Bug 1263890 for CVE-2026-7598",
          "url": "https://bugzilla.suse.com/1263890"
        }
      ],
      "remediations": [
        {
          "category": "vendor_fix",
          "details": "To install this SUSE Security Update use the SUSE recommended installation methods like YaST online_update or \"zypper patch\".\n",
          "product_ids": [
            "SUSE Linux Micro 6.1:libssh2-1-1.11.0-slfo.1.1_2.1.aarch64",
            "SUSE Linux Micro 6.1:libssh2-1-1.11.0-slfo.1.1_2.1.ppc64le",
            "SUSE Linux Micro 6.1:libssh2-1-1.11.0-slfo.1.1_2.1.s390x",
            "SUSE Linux Micro 6.1:libssh2-1-1.11.0-slfo.1.1_2.1.x86_64"
          ]
        }
      ],
      "scores": [
        {
          "cvss_v3": {
            "baseScore": 7.3,
            "baseSeverity": "HIGH",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L",
            "version": "3.1"
          },
          "products": [
            "SUSE Linux Micro 6.1:libssh2-1-1.11.0-slfo.1.1_2.1.aarch64",
            "SUSE Linux Micro 6.1:libssh2-1-1.11.0-slfo.1.1_2.1.ppc64le",
            "SUSE Linux Micro 6.1:libssh2-1-1.11.0-slfo.1.1_2.1.s390x",
            "SUSE Linux Micro 6.1:libssh2-1-1.11.0-slfo.1.1_2.1.x86_64"
          ]
        }
      ],
      "threats": [
        {
          "category": "impact",
          "date": "2026-08-17T16:37:24Z",
          "details": "important"
        }
      ],
      "title": "CVE-2026-7598"
    }
  ]
}



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Taxonomy of the tags.





Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

Author Source Type Date Other

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.


Detection rules are retrieved from Rulezet.


Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.