CVE-2026-68130

CVE CVE-2026-68130EUVD EUVD-2026-55511Published 2026-08-10T11:58:52.000Z

What the advisory describes

In the Linux kernel, the following vulnerability has been resolved: ksmbd: defer destroy_previous_session() until after NTLM authentication In ntlm_authenticate(), destroy_previous_session() is called using a user pointer resolved from the client-supplied NTLM blob username field before the NTLMv2 response is validated. An authenticated attacker can set the NTLM blob username to match a victim account and set PreviousSessionId to the victim's session ID; destroy_previous_session() destroys the victim's session while ksmbd_decode_ntlmssp_auth_blob() subsequently rejects the request with -EPERM. Move destroy_previous_session() and the prev_id assignment to after ksmbd_decode_ntlmssp_auth_blob() returns success and use sess->user rather than the pre-authentication lookup result. This matches the ordering already used by krb5_authenticate(), where destroy_previous_session() is called only after ksmbd_krb5_authenticate() returns success.

Source: EUVD (ENISA), in the words of the advisory.

Products the advisory names

These come from the advisory itself, not from any check we performed.

Linux — Linux patch: 6.18.42; patch: 6.6.148; patch: 7.1.6; e2f34481b24db2fd634b5edb0a5bd0e4d38cc6e9 <243f1614ef2aca2d62a744575f1c24b07cd42757; e2f34481b24db2fd634b5edb0a5bd0e4d38cc6e9 <c74801ee524f477c174a1899782b6c3b6918d407; patch: 0; patch: 6.12.101; e2f34481b24db2fd634b5edb0a5bd0e4d38cc6e9 <5c833074b549e5db125436a6f681af682261f785; patch: 7.2-rc5; e2f34481b24db2fd634b5edb0a5bd0e4d38cc6e9 <0ff12308c8a6c16ab68f0a487ffa93d69001dc18; 5.15; e2f34481b24db2fd634b5edb0a5bd0e4d38cc6e9 <18705cace0619fd2123737dcd028147774f38181

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Carried in the product catalogue

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Linux — Linux

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