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Vulnerability IntelligenceCVE-2025-40099

CVE-2025-40099

CRITICAL9.4

cifs: parse_dfs_referrals: prevent oob on malformed input

Published Oct 30, 2025

Modified 1 months ago

Details

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

cifs: parse_dfs_referrals: prevent oob on malformed input

Malicious SMB server can send invalid reply to FSCTL_DFS_GET_REFERRALS

reply smaller than sizeof(struct get_dfs_referral_rsp)
reply with number of referrals smaller than NumberOfReferrals in the header

Processing of such replies will cause oob.

Return -EINVAL error on such replies to prevent oob-s.

References

WEB

https://git.kernel.org/stable/c/15c73964da9df994302f579ed14ee5fdbce7a332

WEB

https://git.kernel.org/stable/c/6447b0e355562a1ff748c4a2ffb89aae7e84d2c9

WEB

https://git.kernel.org/stable/c/8bc4a8d39bac23d8b044fd3e2dbfd965f1d9b058

WEB

https://git.kernel.org/stable/c/bb0f2e66e1ac043a5b238f5bcab4f26f3c317039

WEB

https://git.kernel.org/stable/c/cfacc7441f760e4a73cc71b6ff1635261d534657

ADVISORY

https://www.cve.org/CVERecord?id=CVE-2025-40099

CVSS Analysis

CVSS v3.1

9.4

Exploitability

Attack Vector

NetworkAV:N

Attack Complexity

LowAC:L

Privileges Required

NonePR:N

User Interaction

NoneUI:N

Scope

UnchangedS:U

Impact

Confidentiality

HighC:H

Integrity

LowI:L

Availability

HighA:H

9.4/CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:L/A:H

Ecosystems

Timeline

PublishedOct 30, 2025

ModifiedAug 5, 2026

CVE-2025-40099 | Mondoo Vulnerability Intelligence