CVE-2026-68743

mediumCVSS 5.5covered by 1 sourcefirst seen 2026-08-04

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.

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Exploitation outlook

Low exploitation risk0.09% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 1% of all EPSS-scored CVEs.

Advisory coverage (1)

mediumCVE-2026-68743: A flaw was found in SSSD. The extract_authtok_v1() function in the PAM responder does not vali…nvd · 2026-08-04

External references

NVD record for CVE-2026-68743

CVE.org record

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