EUVD-2026-28684
GHSA-8cfc-95hv-9rqj
CVSS VectorNVD
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
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8DescriptionNVD
In the Linux kernel, the following vulnerability has been resolved:
smb: server: fix use-after-free in smb2_open()
The opinfo pointer obtained via rcu_dereference(fp->f_opinfo) is dereferenced after rcu_read_unlock(), creating a use-after-free window.
AnalysisAI
Use-after-free in the Linux kernel's ksmbd SMB server (smb2_open()) allows remote attackers to potentially trigger memory corruption when accessing an opinfo pointer dereferenced after rcu_read_unlock(). The flaw is fixed in upstream stable releases (6.1.167, 6.6.130, 6.12.78, 6.18.19, 6.19.9, and 7.0); no public exploit identified at time of analysis, and EPSS exploitation probability is very low at 0.02%.
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RemediationAI
Within 24 hours: Identify all systems running ksmbd SMB service and document current kernel versions. Within 7 days: Establish kernel patch deployment schedule targeting versions 6.1.167, 6.6.130, 6.12.78, 6.18.19, 6.19.9, or 7.0+. …
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