CVE-2023-4515

ksmbd: validate command request size

State: Published
Severity: 9.1 Critical
Published: Aug 16, 2025
Updated: Aug 5, 2026
Reserved: Aug 24, 2023

Description

In the Linux kernel, the following vulnerability has been resolved:

ksmbd: validate command request size

In commit 2b9b8f3b68ed ("ksmbd: validate command payload size"), except for SMB2_OPLOCK_BREAK_HE command, the request size of other commands is not checked, it's not expected. Fix it by add check for request size of other commands.

Scores

CVSS	Score	Vector	Source
3.1	9.1 Critical	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H	Linux

Weaknesses

The record names no weakness.

Affected Products

Product	Versions
LinuxLinux	35f450f54dca1519bb24faacd0428db09f89a11f to before 595679098bdcdbfbba91ebe07a2f7f208df93870Affected 9650cf70ec9d94ff34daa088b643229231723c26 to before c6bef3bc30fd4a175aef846b7d928a6c40d091cdAffected 2b9b8f3b68edb3d67d79962f02e26dbb5ae3808d to before ff7236b66d69582f90cf5616e63cfc3dc18142bbAffected 2b9b8f3b68edb3d67d79962f02e26dbb5ae3808d to before 5aa4fda5aa9c2a5a7bac67b4a12b089ab81fee3cAffected 768caf4019f0391c0b6452afe34cea1704133f7bAffected 5.15.121 to before 5.15.127Affected 6.1.36 to before 6.1.46Affected 6.3.10 to before 6.4Affected
LinuxLinux	6.4Affected before 6.4Not affected 5.15.127 through 5.15.Not affected 6.1.46 through 6.1.Not affected 6.4.11 through 6.4.*Not affected 6.5 and laterNot affected

Product

Versions

LinuxLinux

35f450f54dca1519bb24faacd0428db09f89a11f to before 595679098bdcdbfbba91ebe07a2f7f208df93870Affected
9650cf70ec9d94ff34daa088b643229231723c26 to before c6bef3bc30fd4a175aef846b7d928a6c40d091cdAffected
2b9b8f3b68edb3d67d79962f02e26dbb5ae3808d to before ff7236b66d69582f90cf5616e63cfc3dc18142bbAffected
2b9b8f3b68edb3d67d79962f02e26dbb5ae3808d to before 5aa4fda5aa9c2a5a7bac67b4a12b089ab81fee3cAffected
768caf4019f0391c0b6452afe34cea1704133f7bAffected
5.15.121 to before 5.15.127Affected
6.1.36 to before 6.1.46Affected
6.3.10 to before 6.4Affected

LinuxLinux

6.4Affected
before 6.4Not affected
5.15.127 through 5.15.*Not affected
6.1.46 through 6.1.*Not affected
6.4.11 through 6.4.*Not affected
6.5 and laterNot affected

References

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