Bug 2363331 (CVE-2025-37778)

Summary: CVE-2025-37778 kernel: ksmbd: Fix dangling pointer in krb_authenticate
Product: [Other] Security Response Reporter: OSIDB Bzimport <bzimport>
Component: vulnerabilityAssignee: Product Security DevOps Team <prodsec-dev>
Status: NEW --- QA Contact:
Severity: medium Docs Contact:
Priority: medium    
Version: unspecifiedCC: dfreiber, drow, jburrell, vkumar
Target Milestone: ---Keywords: Security
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Hardware: All   
OS: Linux   
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Description OSIDB Bzimport 2025-05-01 14:04:11 UTC 
In the Linux kernel, the following vulnerability has been resolved:

ksmbd: Fix dangling pointer in krb_authenticate

krb_authenticate frees sess->user and does not set the pointer
to NULL. It calls ksmbd_krb5_authenticate to reinitialise
sess->user but that function may return without doing so. If
that happens then smb2_sess_setup, which calls krb_authenticate,
will be accessing free'd memory when it later uses sess->user.
Comment 1 Avinash Hanwate 2025-05-02 04:54:33 UTC 
Upstream advisory:
https://lore.kernel.org/linux-cve-announce/2025050116-CVE-2025-37778-7202@gregkh/T