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CVE-2025-39942— ksmbd: smbdirect: verify remaining_data_length respects max_fragmented_recv_size

CVSS 7.5 · High EPSS 0.26% · P18

Possible ATT&CK Techniques 1AI

T1190 · Exploit Public-Facing Application

Affected Version Matrix 12

VendorProductVersion RangeStatus
LinuxLinux2ea086e35c3d726a3bacd0a971c1f02a50e98206< 196a3a7676d726ee67621ea2bf3b7815ac2685b4affected
2ea086e35c3d726a3bacd0a971c1f02a50e98206< d3cb3f209d35c44b7ee74f77ed27ebb28995b9ceaffected
2ea086e35c3d726a3bacd0a971c1f02a50e98206< 9644798294c7287e65a7b26e35aa6d2ce3345bccaffected
2ea086e35c3d726a3bacd0a971c1f02a50e98206< c64b915bb3d9339adcae5db4be2c35ffbef5e615affected
2ea086e35c3d726a3bacd0a971c1f02a50e98206< e1868ba37fd27c6a68e31565402b154beaa65df0affected
5.15affected
< 5.15unaffected
6.1.154≤ 6.1.*unaffected
… +4 more rows
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I. Basic Information for CVE-2025-39942

Vulnerability Information
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Vulnerability Title
ksmbd: smbdirect: verify remaining_data_length respects max_fragmented_recv_size
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: ksmbd: smbdirect: verify remaining_data_length respects max_fragmented_recv_size This is inspired by the check for data_offset + data_length.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/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，该漏洞源于未验证剩余数据长度是否符合最大分段接收大小限制，可能导致缓冲区溢出。
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

VendorProductAffected VersionsCPESubscribe
LinuxLinux 2ea086e35c3d726a3bacd0a971c1f02a50e98206 ~ 196a3a7676d726ee67621ea2bf3b7815ac2685b4 -
LinuxLinux 5.15 -

II. Public POCs for CVE-2025-39942

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III. Intelligence Information for CVE-2025-39942

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Patches & Fixes for CVE-2025-39942 (5)

Same Patch Batch · Linux · 2025-10-04 · 144 CVEs total

CVE-2025-399329.8 CRITICALsmb: client: let smbd_destroy() call disable_work_sync(&info->post_send_credits_work)
CVE-2025-399489.8 CRITICALice: fix Rx page leak on multi-buffer frames
CVE-2025-399469.8 CRITICALtls: make sure to abort the stream if headers are bogus
CVE-2025-399339.4 CRITICALsmb: client: let recv_done verify data_offset, data_length and remaining_data_length
CVE-2025-399439.4 CRITICALksmbd: smbdirect: validate data_offset and data_length field of smb_direct_data_transfer
CVE-2025-399528.8 HIGHwifi: wilc1000: avoid buffer overflow in WID string configuration
CVE-2025-399317.8 HIGHcrypto: af_alg - Set merge to zero early in af_alg_sendmsg
CVE-2025-399517.8 HIGHum: virtio_uml: Fix use-after-free after put_device in probe
CVE-2025-399497.8 HIGHqed: Don't collect too many protection override GRC elements
CVE-2025-399457.8 HIGHcnic: Fix use-after-free bugs in cnic_delete_task
CVE-2025-399447.8 HIGHocteontx2-pf: Fix use-after-free bugs in otx2_sync_tstamp()
CVE-2025-399397.8 HIGHiommu/s390: Fix memory corruption when using identity domain
CVE-2025-399417.8 HIGHzram: fix slot write race condition
CVE-2025-399357.8 HIGHASoC: codec: sma1307: Fix memory corruption in sma1307_setting_loaded()
CVE-2025-399297.5 HIGHsmb: client: fix smbdirect_recv_io leak in smbd_negotiate() error path
CVE-2022-50504powerpc/rtas: avoid scheduling in rtas_os_term()
CVE-2022-50498eth: alx: take rtnl_lock on resume
CVE-2022-50505iommu/amd: Fix pci device refcount leak in ppr_notifier()
CVE-2022-50503mtd: lpddr2_nvm: Fix possible null-ptr-deref
CVE-2022-50499media: dvb-core: Fix double free in dvb_register_device()

Showing top 20 of 144 CVEs. View all on vendor page &rarr; →

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

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