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CVE-2025-39933

smb: client: let recv_done verify data_offset, data_length and remaining_data_length

MEDIUM
5.5
CVSS Score
Published: October 4, 2025 at 07:30 AM UTC
Updated: October 30, 2026 at 01:18 PM UTC
1 product affected across 1 vendorLinux Kernel

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Severity
MEDIUM5.5
Exploit prediction
EPSS 0.3%
SSVC
No known exploit

Description

In the Linux kernel, the following vulnerability has been resolved: smb: client: let recv_done verify data_offset, data_length and remaining_data_length This is inspired by the related server fixes.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Linux Kernel· Linux
95%
4.16 ≤ v < 6.16.96.176.17 rc16.17 rc26.17 rc36.17 rc46.17 rc56.17 rc6f198186aa9bbd60fae7a2061f4feec614d880299
Vendor states this is fixed in 581fb78e0388b78911b0c920e4073737090c8b5f (fixed)
Vendor states this is fixed in f57e53ea252363234f86674db475839e5b87102e (fixed)
Vendor states this is fixed in 4.16 (unaffected)
Vendor states this is fixed in 6.12.114 (unaffected)
Vendor states this is fixed in 6.16.9 (unaffected)
Vendor states this is fixed in 6.17 (unaffected)
Vendor states this is fixed in 6.6.160 (unaffected)

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

Patch and advisory references

References (5)

Patch
Source: cverecord
https://git.kernel.org/stable/c/581fb78e0388b78911b0c920e4073737090c8b5f
Patch
Source: cverecord
https://git.kernel.org/stable/c/f57e53ea252363234f86674db475839e5b87102e
Source: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
https://git.kernel.org/stable/c/241e58de23e7c1bbb9bee526c17d9a0f2a90fbad
Source: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
https://git.kernel.org/stable/c/f23d5c6b7540ec9b1e73a8ea3b2ae9045248d728
Source: cverecord
https://git.kernel.org/stable/c/fdc23a47be015fba915c4f9dfd43c65ad4829a35

SSVC — Action Prioritization

SSVCNo known exploitNot automatablePartial impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

5.5MEDIUM[email protected]
Attack Vector
LOCAL
Complexity
LOW
Privileges
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
NONE
Integrity
NONE
Availability
HIGH
Vector?

Quick Info

StatusMODIFIED
CWE
NVD-CWE-noinfo

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