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CVE-2025-40099— cifs: parse_dfs_referrals: prevent oob on malformed input

Quick assessment

Affected
Linux Linux
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Linux kernel是美国Linux基金会的开源操作系统Linux所使用的内核。 Linux kernel存在安全漏洞，该漏洞源于未正确处理DFS转介响应，可能导致越界访问。

CVSS 9.4 · Critical EPSS 0.41% · P34

Affected Version Matrix 12

VendorProduct Version RangeStatus
Linux Linux 4ecce920e13ace16a5ba45efe8909946c28fb2ad< cfacc7441f760e4a73cc71b6ff1635261d534657 affected
4ecce920e13ace16a5ba45efe8909946c28fb2ad< 15c73964da9df994302f579ed14ee5fdbce7a332 affected
4ecce920e13ace16a5ba45efe8909946c28fb2ad< 8bc4a8d39bac23d8b044fd3e2dbfd965f1d9b058 affected
4ecce920e13ace16a5ba45efe8909946c28fb2ad< bb0f2e66e1ac043a5b238f5bcab4f26f3c317039 affected
4ecce920e13ace16a5ba45efe8909946c28fb2ad< 6447b0e355562a1ff748c4a2ffb89aae7e84d2c9 affected
4.11 affected
< 4.11 unaffected
6.1.158≤ 6.1.* unaffected
… +4 more rows
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I. Basic Information for CVE-2025-40099

Vulnerability Information
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Vulnerability Title
cifs: parse_dfs_referrals: prevent oob on malformed input
Source: CVE Program / CVE List V5
Vulnerability Description
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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:L/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
N/A
Source: CVE Program / CVE List V5
Vulnerability Title
Linux kernel 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Linux kernel是美国Linux基金会的开源操作系统Linux所使用的内核。 Linux kernel存在安全漏洞，该漏洞源于未正确处理DFS转介响应，可能导致越界访问。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
Linux Linux 4ecce920e13ace16a5ba45efe8909946c28fb2ad ~ cfacc7441f760e4a73cc71b6ff1635261d534657 -
Linux Linux 4.11 -

II. Public POCs for CVE-2025-40099

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III. Intelligence Information for CVE-2025-40099

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Same Patch Batch · Linux · 2025-10-30 · 20 CVEs total

CVE-2025-40095 7.8 HIGH usb: gadget: f_rndis: Refactor bind path to use __free()
CVE-2025-40105 7.8 HIGH vfs: Don't leak disconnected dentries on umount
CVE-2025-40104 7.8 HIGH ixgbevf: fix mailbox API compatibility by negotiating supported features
CVE-2025-40096 7.8 HIGH drm/sched: Fix potential double free in drm_sched_job_add_resv_dependencies
CVE-2025-40094 7.8 HIGH usb: gadget: f_acm: Refactor bind path to use __free()
CVE-2025-40093 7.8 HIGH usb: gadget: f_ecm: Refactor bind path to use __free()
CVE-2025-40092 7.8 HIGH usb: gadget: f_ncm: Refactor bind path to use __free()
CVE-2025-40090 7.5 HIGH ksmbd: fix recursive locking in RPC handle list access
CVE-2025-40087 7.5 HIGH NFSD: Define a proc_layoutcommit for the FlexFiles layout type
CVE-2025-40088 7.1 HIGH hfsplus: fix slab-out-of-bounds read in hfsplus_strcasecmp()
CVE-2025-40091 ixgbe: fix too early devlink_free() in ixgbe_remove()
CVE-2025-40086 drm/xe: Don't allow evicting of BOs in same VM in array of VM binds
CVE-2025-40089 cxl/features: Add check for no entries in cxl_feature_info
CVE-2025-40097 ALSA: hda: Fix missing pointer check in hda_component_manager_init function
CVE-2025-40098 ALSA: hda: cs35l41: Fix NULL pointer dereference in cs35l41_get_acpi_mute_state()
CVE-2025-40101 btrfs: fix memory leaks when rejecting a non SINGLE data profile without an RST
CVE-2025-40100 btrfs: do not assert we found block group item when creating free space tree
CVE-2025-40102 KVM: arm64: Prevent access to vCPU events before init
CVE-2025-40103 smb: client: Fix refcount leak for cifs_sb_tlink

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

V. Comments for CVE-2025-40099

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