CVE-2026-0968— Libssh: libssh: denial of service due to malformed sftp message
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I. Basic Information for CVE-2026-0968
Vulnerability Information
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Vulnerability Title
Libssh: libssh: denial of service due to malformed sftp message
Source: NVD (National Vulnerability Database)
Vulnerability Description
A flaw was found in libssh in which a malicious SFTP (SSH File Transfer Protocol) server can exploit this by sending a malformed 'longname' field within an `SSH_FXP_NAME` message during a file listing operation. This missing null check can lead to reading beyond allocated memory on the heap. This can cause unexpected behavior or lead to a denial of service (DoS) due to application crashes.
Source: NVD (National Vulnerability Database)
CVSS Information
CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:N/I:N/A:L
Source: NVD (National Vulnerability Database)
Vulnerability Type
空指针解引用
Source: NVD (National Vulnerability Database)
Vulnerability Title
libssh 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
libssh是libssh组织的一个用于访问SSH服务的C语言开发包，它能够执行远程命令、文件传输，同时为远程的程序提供安全的传输通道。 libssh存在安全漏洞，该漏洞源于畸形SFTP消息，可能导致拒绝服务。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)
Affected Products
| Vendor | Product | Affected Versions | CPE | Subscribe |
|---|---|---|---|---|
| Red Hat | Red Hat Enterprise Linux 10 | - | cpe:/o:redhat:enterprise_linux:10 | |
| Red Hat | Red Hat Enterprise Linux 6 | - | cpe:/o:redhat:enterprise_linux:6 | |
| Red Hat | Red Hat Enterprise Linux 7 | - | cpe:/o:redhat:enterprise_linux:7 | |
| Red Hat | Red Hat Enterprise Linux 8 | - | cpe:/o:redhat:enterprise_linux:8 | |
| Red Hat | Red Hat Enterprise Linux 9 | - | cpe:/o:redhat:enterprise_linux:9 | |
| Red Hat | Red Hat Hardened Images | - | cpe:/a:redhat:hummingbird:1 | |
| Red Hat | Red Hat OpenShift Container Platform 4 | - | cpe:/a:redhat:openshift:4 |
II. Public POCs for CVE-2026-0968
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- 2436982 – (CVE-2026-0968) CVE-2026-0968 libssh: libssh: Denial of Service due to malformed SFTP messageissue-trackingx_refsource_REDHAT
- https://nvd.nist.gov/vuln/detail/CVE-2026-0968
Same Patch Batch · Red Hat · 2026-03-26 · 17 CVEs total
| CVE-2025-12805 | 8.1 HIGH | Llama-stack-k8s-operator: llama stack service exposed across namespaces due to missing net |
| CVE-2026-1961 | 8.0 HIGH | Forman: foreman: remote code execution via command injection in websocket proxy |
| CVE-2026-2436 | 6.5 MEDIUM | Libsoup: libsoup: denial of service via use-after-free in soupserver during tls handshake |
| CVE-2026-3121 | 6.5 MEDIUM | Keycloak: org.keycloak/keycloak-services: keycloak: privilege escalation via manage-client |
| CVE-2026-4887 | 6.1 MEDIUM | Gimp: gimp:memory disclosure and denial of service via specially crafted pcx image |
| CVE-2026-4897 | 5.5 MEDIUM | Polkit: polkit: denial of service via unbounded input processing through standard input |
| CVE-2026-2100 | 5.3 MEDIUM | P11-kit: null dereference via c_derivekey with specific null parameters |
| CVE-2026-2272 | 4.3 MEDIUM | Gimp: gimp: memory corruption due to integer overflow in ico file handling |
| CVE-2026-3190 | 4.3 MEDIUM | Keycloak: keycloak: information disclosure via improper role enforcement in uma 2.0 protec |
| CVE-2026-2271 | 3.3 LOW | Gimp: gimp: denial of service via crafted psp image file |
| CVE-2026-4874 | 3.1 LOW | Org.keycloak.protocol.oidc.grants: org.keycloak.services.managers: keycloak: server-side r |
| CVE-2026-2239 | 2.8 LOW | Gimp: gimp: application crash (dos) via crafted psd file due to heap-buffer-overflow |
| CVE-2026-0965 | Libssh: libssh: denial of service via improper configuration file handling | |
| CVE-2026-0967 | Libssh: libssh: denial of service via inefficient regular expression processing | |
| CVE-2026-0964 | Libssh: improper sanitation of paths received from scp servers | |
| CVE-2026-0966 | Libssh: buffer underflow in ssh_get_hexa() on invalid input |
IV. Related Vulnerabilities
Same product: Red Hat Enterprise Linux 10
- CVE-2026-42011
Gnutls: gnutls: security bypass due to incorrect name constr - CVE-2026-42010
Gnutls: gnutls: authentication bypass via nul character in u - CVE-2026-6420
Keylime: keylime: security bypass due to hardcoded tpm quote - CVE-2026-34002
Xorg: xwayland: x.org x server: information disclosure or de - CVE-2026-34000
Xwayland: xorg: x.org x server: information disclosure and d
Same vendor: Red Hat
- CVE-2026-42011
Gnutls: gnutls: security bypass due to incorrect name constr - CVE-2026-42010
Gnutls: gnutls: authentication bypass via nul character in u - CVE-2026-6420
Keylime: keylime: security bypass due to hardcoded tpm quote - CVE-2026-34956
Openvswitch: open vswitch: denial of service via malformed f - CVE-2026-34002
Xorg: xwayland: x.org x server: information disclosure or de
Same weakness: CWE-476
- CVE-2026-8252
Open5GS SMF smf_nsmf_handle_create_data_in_hsmf null pointer - CVE-2026-7259
Null pointer dereference in php_mb_check_encoding() via mb_e - CVE-2026-7262
NULL pointer dereference in SOAP apache:Map decoder with mis - CVE-2026-42183
Argo Workflows: SSO RBAC Delegation Nil Pointer Dereference - CVE-2026-6666
PgBouncer crash in kill_pool_logins_server_error
V. Comments for CVE-2026-0968
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