CVE-2025-37778
ksmbd: Fix dangling pointer in krb_authenticate
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Description
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.
Affected
Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.
Remediation
No guide yetNo remediation guidance has been written for this CVE yet. What the record does show:
Patch and advisory references
- https://git.kernel.org/stable/c/1db2451de23e98bc864c6a6e52aa0d82c91cb325
- https://git.kernel.org/stable/c/1e440d5b25b7efccb3defe542a73c51005799a5f
- https://git.kernel.org/stable/c/6e30c0e10210c714f3d4453dc258d4abcc70364e
- https://git.kernel.org/stable/c/d5b554bc8d554ed6ddf443d3db2fad9f665cec10
- https://git.kernel.org/stable/c/e83e39a5f6a01a81411a4558a59a10f87aa88dd6
References (7)
SSVC — Action Prioritization
SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.
CVSS
- Attack Vector
- LOCAL
- Complexity
- LOW
- Privileges
- LOW
- User Interaction
- NONE
- Scope
- UNCHANGED
- Confidentiality
- HIGH
- Integrity
- HIGH
- Availability
- HIGH
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