CVE-2026-6245
mediumpriority · track · 0EPSS 0.001 · 3 %ileEURUUSEPSS · scored 2026-10-27
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).
cvss
Technical severity, 0–10. One row per scoring source.
base score 0–10 · higher = more severe · hover a vector to decode
ssvc
A stakeholder decision — act, attend, or track — from exploitation and impact.
weaknesses
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affected products (22)
Products and version ranges known to be affected.
also known as (3)
Other names and identifiers for this entity.
sources
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references (7)
External citations — patches, advisories, analysis.
- https://access.redhat.com/security/cve/cve-2026-6245cnnvd
- https://nvd.nist.gov/vuln/detail/CVE-2026-6245cnnvd
- https://sssd.io/Patchcnnvd
- https://access.redhat.com/security/cve/CVE-2026-6245enisa_euvd
- https://bugzilla.redhat.com/show_bug.cgi?id=2457954enisa_euvd
- https://access.redhat.com/security/cve/CVE-2026-6245Vendor Advisorynvd
- https://bugzilla.redhat.com/show_bug.cgi?id=2457954Issue TrackingVendor Advisorynvd
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