CVE-2026-68743— Sssd: sssd: pam responder out-of-bounds read via unchecked auth_token_length in protocol v1
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 SSSD是美国Red Hat公司的一款身份认证与权限管理软件。 Red Hat SSSD存在缓冲区错误漏洞，该漏洞源于PAM响应器中的extract_authtok_v1()函数在处理前未验证auth_token_length字段与剩余缓冲区大小，可能导致本地攻击者通过特制的v1协议请求造成越界读取和进程崩溃，导致拒绝服务。
Possible ATT&CK Techniques 2 AI
T1068 · Exploitation for Privilege Escalation T1055 · Process InjectionAffected Version Matrix 7
| Vendor | Product | Version Range | Status |
|---|---|---|---|
| Red Hat | Red Hat Enterprise Linux 10 | any |
affected |
| Red Hat | Red Hat Enterprise Linux 6 | any |
unknown |
| 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-2026-68743
Vulnerability Information
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Vulnerability Title
Sssd: sssd: pam responder out-of-bounds read via unchecked auth_token_length in protocol v1
Source: CVE Program / CVE List V5
Vulnerability Description
A flaw was found in SSSD. The extract_authtok_v1() function in the PAM responder does not validate the auth_token_length field against the remaining buffer size before processing. A local attacker can exploit this via a crafted protocol v1 request to the PAM responder socket, causing an out-of-bounds read and process crash, resulting in a denial of service.
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
跨界内存读
Source: CVE Program / CVE List V5
Vulnerability Title
Red Hat SSSD 缓冲区错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Red Hat SSSD是美国Red Hat公司的一款身份认证与权限管理软件。 Red Hat SSSD存在缓冲区错误漏洞，该漏洞源于PAM响应器中的extract_authtok_v1()函数在处理前未验证auth_token_length字段与剩余缓冲区大小，可能导致本地攻击者通过特制的v1协议请求造成越界读取和进程崩溃，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 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-2026-68743
| # | POC Description | Source Link | Shenlong Link |
|---|
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Vendor Advisories for CVE-2026-68743 (2)
Same Patch Batch · Red Hat · 2026-08-04 · 6 CVEs total
| CVE-2026-42169 | 7.3 HIGH | Gimp: gimp apng loader heap-buffer-overflow when fctl width exceeds ihdr width (file-png.c |
| CVE-2026-18103 | 4.9 MEDIUM | Dhcp-server: dhcp-server: persistent denial of service due to buffer overflow via omapi |
| CVE-2026-17614 | 4.4 MEDIUM | Wildfly-core: path traversal on wildfly domain controller |
| CVE-2026-18569 | 3.7 LOW | Keycloak-services: keycloak-services: oidc backchannel logout accepts unsigned forged logo |
| CVE-2026-68744 | 3.3 LOW | Sssd: sssd: nss responder uninitialized heap disclosure in initgroups reply |
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V. Comments for CVE-2026-68743
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