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CVE-2026-68743— Sssd: sssd: pam responder out-of-bounds read via unchecked auth_token_length in protocol v1

CVSS 5.5 · Medium
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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

Affected Products

VendorProductAffected VersionsCPESubscribe
Red HatRed Hat Enterprise Linux 10-cpe:/o:redhat:enterprise_linux:10
Red HatRed Hat Enterprise Linux 6-cpe:/o:redhat:enterprise_linux:6
Red HatRed Hat Enterprise Linux 7-cpe:/o:redhat:enterprise_linux:7
Red HatRed Hat Enterprise Linux 8-cpe:/o:redhat:enterprise_linux:8
Red HatRed Hat Enterprise Linux 9-cpe:/o:redhat:enterprise_linux:9
Red HatRed Hat OpenShift Container Platform 4-cpe:/a:redhat:openshift:4

II. Public POCs for CVE-2026-68743

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III. Intelligence Information for CVE-2026-68743

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Vendor Advisories for CVE-2026-68743 (1)

Other References for CVE-2026-68743 (1)

Same Patch Batch · Red Hat · 2026-08-04 · 8 CVEs total

CVE-2026-421697.3 HIGHGimp: gimp apng loader heap-buffer-overflow when fctl width exceeds ihdr width (file-png.c
CVE-2026-703686.5 MEDIUMStunnel: stack-based out-of-bounds read/write in stunnel s_vlog via oversized log message
CVE-2026-703675.4 MEDIUMStunnel: ssrf bypass in stunnel socks proxy via ipv4-mapped ipv6 loopback and unspecified
CVE-2026-176144.4 MEDIUMWildfly-core: path traversal on wildfly domain controller
CVE-2026-185693.7 LOWKeycloak-services: keycloak-services: oidc backchannel logout accepts unsigned forged logo
CVE-2026-687443.3 LOWSssd: sssd: nss responder uninitialized heap disclosure in initgroups reply
CVE-2026-187392.5 LOWPopt-devel: popt-static: off-by-one in poptstuffargs

IV. Related Vulnerabilities

Same product: Red Hat Enterprise Linux 10
Same vendor: Red Hat
Same weakness: CWE-125

V. Comments for CVE-2026-68743

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