CVE-2026-68130
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.
Affected versions
Linux kernel versions
5.15
and later are affected. Fixed in
5.15.217,
6.1.183,
6.6.148,
6.12.101,
6.18.42,
7.1.6,
7.2
and their respective stable series.
References
7 totalFrequently asked questions
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What is CVE-2026-68130?
CVE-2026-68130 is a unscored severity Linux kernel vulnerability . It affects Linux kernel versions from 5.15 onward and has been patched in 5.15.217, 6.1.183, 6.6.148 and others. CVE-2026-68130 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.
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Is there a patch available for CVE-2026-68130?
Yes. CVE-2026-68130 has been patched. Fixed versions include 5.15.217, 6.1.183, 6.6.148 and others. If you are running Linux kernel 5.15 or later up to the fix versions, apply the relevant patch for your kernel branch.
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Is CVE-2026-68130 actively exploited?
No. CVE-2026-68130 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.