Goal Reached Thanks to every supporter — we hit 100%!

Goal: 1000 CNY · Raised: 1359 CNY

100%
Buy Us a Coffee

CVE-2026-0966— Libssh: libssh: denial of service via zero-length input in ssh_get_hexa()

Quick assessment

Affected
Red Hat Red Hat Enterprise Linux 10
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

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ssh_get_hexa函数在无效输入时存在缓冲区下溢。

AI Predicted 5.9 Difficulty: Easy EPSS 0.58% · P46

Possible ATT&CK Techniques 1 AI

T1499 · Endpoint Denial of Service

Affected Version Matrix 10

VendorProduct Version RangeStatus
Red Hat Red Hat Enterprise Linux 10 0:0.12.0-2.el10< * unaffected
Red Hat Red Hat Enterprise Linux 6 any unaffected
Red Hat Red Hat Enterprise Linux 7 any unaffected
Red Hat Red Hat Enterprise Linux 8 any affected
Red Hat Red Hat Enterprise Linux 9 0:0.10.4-18.el9< * unaffected
0:0.10.4-18.el9< * unaffected
Red Hat Red Hat Hardened Images 0.12.0-1.1.hum1< * unaffected
any unaffected
Red Hat Red Hat OpenShift Container Platform 4 any affected
any affected
Get alerts for future matching vulnerabilities Log in to subscribe

I. Basic Information for CVE-2026-0966

Vulnerability Information
Have questions about the vulnerability? See if Shenlong's analysis helps!
View Shenlong Deep Dive ↗

Although we use advanced large model technology, its output may still contain inaccurate or outdated information.Shenlong tries to ensure data accuracy, but please verify and judge based on the actual situation.

Vulnerability Title
Libssh: libssh: denial of service via zero-length input in ssh_get_hexa()
Source: CVE Program / CVE List V5
Vulnerability Description
A flaw was found in libssh. The API function `ssh_get_hexa()` is vulnerable to a denial of service when processing zero-length input. This can be exploited remotely by an attacker during GSSAPI (Generic Security Service Application Program Interface) authentication if the server's logging verbosity is set to `SSH_LOG_PACKET (3)` or higher. Successful exploitation could lead to a self-Denial of Service of the per-connection daemon process.
Source: CVE Program / CVE List V5
CVSS Information
N/A
Source: CVE Program / CVE List V5
Vulnerability Type
缓冲区下溢
Source: CVE Program / CVE List V5
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ssh_get_hexa函数在无效输入时存在缓冲区下溢。
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 0:0.12.0-2.el10 ~ * cpe:/o:redhat:enterprise_linux:10.2
Red Hat Red Hat Enterprise Linux 9 0:0.10.4-18.el9 ~ * cpe:/a:redhat:enterprise_linux:9::appstream
Red Hat Red Hat Enterprise Linux 9 0:0.10.4-18.el9 ~ * cpe:/a:redhat:enterprise_linux:9::appstream
Red Hat Red Hat Hardened Images 0.12.0-1.1.hum1 ~ * cpe:/a:redhat:hummingbird:1
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 Hardened Images - cpe:/a:redhat:hummingbird:1
Red Hat Red Hat OpenShift Container Platform 4 - cpe:/a:redhat:openshift:4
Red Hat Red Hat OpenShift Container Platform 4 - cpe:/a:redhat:openshift:4

II. Public POCs for CVE-2026-0966

# POC Description Source Link Shenlong Link
AI-Generated POC Premium

No public POC found.

Login to generate AI POC

III. Intelligence Information for CVE-2026-0966

请登录查看更多情报信息。

Vendor Advisories for CVE-2026-0966 (5)

Same Patch Batch · Red Hat · 2026-03-26 · 16 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-2026-2272 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-2026-0968 3.1 LOW Libssh: libssh: denial of service due to malformed sftp message
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

IV. Related Vulnerabilities

Same product: Red Hat Enterprise Linux 10
Same vendor: Red Hat
Same weakness: CWE-124

V. Comments for CVE-2026-0966

No comments yet

Leave a comment