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CVE-2026-6245— Sssd: out-of-bounds read in the sssd

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.

Red Hat System Security Services Daemon是美国红帽（Red Hat）公司的一个Linux中的守护进程组件。 Red Hat System Security Services Daemon存在安全漏洞，该漏洞源于pam_passkey_child_read_data函数未正确处理管道原始字节，可能导致本地攻击者通过特制请求触发越界读取，造成拒绝服务。

CVSS 5.5 · Medium EPSS 0.15% · P3

Possible ATT&CK Techniques 1 AI

T1499.002 · Service Exhaustion Flood

Affected Version Matrix 7

VendorProduct Version RangeStatus
Red Hat Red Hat Enterprise Linux 10 any affected
Red Hat Red Hat Enterprise Linux 6 any affected
Red Hat Red Hat Enterprise Linux 7 any affected
Red Hat Red Hat Enterprise Linux 8 any affected
Red Hat Red Hat Enterprise Linux 9 any affected
Red Hat Red Hat OpenShift Container Platform 4 any affected
any affected
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I. Basic Information for CVE-2026-6245

Vulnerability Information
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Vulnerability Title
Sssd: out-of-bounds read in the sssd
Source: CVE Program / CVE List V5
Vulnerability Description
A flaw was found in the System Security Services Daemon (SSSD). The pam_passkey_child_read_data() function within the PAM passkey responder fails to properly handle raw bytes received from a pipe. Because the data is treated as a NUL-terminated C string without explicit termination, it results in an out-of-bounds read when processed by functions like snprintf(). A local attacker could potentially trigger this vulnerability by initiating a crafted passkey authentication request, causing the SSSD PAM responder to crash, resulting in a local Denial of Service (DoS).
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
使用不正确的长度值访问缓冲区
Source: CVE Program / CVE List V5
Vulnerability Title
Red Hat System Security Services Daemon 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Red Hat System Security Services Daemon是美国红帽（Red Hat）公司的一个Linux中的守护进程组件。 Red Hat System Security Services Daemon存在安全漏洞，该漏洞源于pam_passkey_child_read_data函数未正确处理管道原始字节，可能导致本地攻击者通过特制请求触发越界读取，造成拒绝服务。
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 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-2026-6245

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III. Intelligence Information for CVE-2026-6245

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Vendor Advisories for CVE-2026-6245 (1)

Same Patch Batch · Red Hat · 2026-04-15 · 10 CVEs total

CVE-2026-6388 9.1 CRITICAL Argocd-image-updater: argocd image updater: cross-namespace privilege escalation via insuf
CVE-2026-6384 7.3 HIGH Gimp: gimp: arbitrary code execution or denial of service via buffer overflow in gif image
CVE-2026-6385 6.5 MEDIUM Ffmpeg: ffmpeg: denial of service and potential arbitrary code execution via signed intege
CVE-2026-40919 6.1 MEDIUM Gimp: gimp: denial of service via specially crafted seattle filmworks file
CVE-2026-40915 5.5 MEDIUM Gimp: gimp: heap buffer overflow due to integer overflow in fits image loader
CVE-2026-40918 5.5 MEDIUM Gimp: gimp: denial of service via crafted pvr image file
CVE-2026-6383 5.4 MEDIUM Kubevirt: kubevirt: unauthorized subresource access due to improper rbac evaluation
CVE-2026-40916 5.0 MEDIUM Gimp: gimp: denial of service due to stack buffer overflow in tim image loader
CVE-2026-40917 5.0 MEDIUM Gimp: gimp: application crashes or information disclosure via crafted icns image files

IV. Related Vulnerabilities

Same product: Red Hat Enterprise Linux 10
Same vendor: Red Hat
Same weakness: CWE-805

V. Comments for CVE-2026-6245

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