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CVE-2025-39933— smb: client: let recv_done verify data_offset, data_length and remaining_data_length

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存在安全漏洞，该漏洞源于未验证data_offset、data_length和remaining_data_length，可能导致数据验证不足。

CVSS 9.4 · Critical EPSS 0.26% · P17

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application

Affected Version Matrix 10

VendorProduct Version RangeStatus
Linux Linux f198186aa9bbd60fae7a2061f4feec614d880299< f23d5c6b7540ec9b1e73a8ea3b2ae9045248d728 affected
f198186aa9bbd60fae7a2061f4feec614d880299< 241e58de23e7c1bbb9bee526c17d9a0f2a90fbad affected
f198186aa9bbd60fae7a2061f4feec614d880299< 581fb78e0388b78911b0c920e4073737090c8b5f affected
f198186aa9bbd60fae7a2061f4feec614d880299< f57e53ea252363234f86674db475839e5b87102e affected
4.16 affected
< 4.16 unaffected
6.6.160≤ 6.6.* unaffected
6.12.114≤ 6.12.* unaffected
… +2 more rows
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I. Basic Information for CVE-2025-39933

Vulnerability Information
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Vulnerability Title
smb: client: let recv_done verify data_offset, data_length and remaining_data_length
Source: CVE Program / CVE List V5
Vulnerability 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.
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存在安全漏洞，该漏洞源于未验证data_offset、data_length和remaining_data_length，可能导致数据验证不足。
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 f198186aa9bbd60fae7a2061f4feec614d880299 ~ f23d5c6b7540ec9b1e73a8ea3b2ae9045248d728 -
Linux Linux 4.16 -

II. Public POCs for CVE-2025-39933

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III. Intelligence Information for CVE-2025-39933

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Patches & Fixes for CVE-2025-39933 (4)

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

CVE-2025-39932 9.8 CRITICAL smb: client: let smbd_destroy() call disable_work_sync(&info->post_send_credits_work)
CVE-2025-39948 9.8 CRITICAL ice: fix Rx page leak on multi-buffer frames
CVE-2025-39946 9.8 CRITICAL tls: make sure to abort the stream if headers are bogus
CVE-2025-39943 9.4 CRITICAL ksmbd: smbdirect: validate data_offset and data_length field of smb_direct_data_transfer
CVE-2023-53600 9.1 CRITICAL tunnels: fix kasan splat when generating ipv4 pmtu error
CVE-2023-53615 8.8 HIGH scsi: qla2xxx: Fix deletion race condition
CVE-2025-39952 8.8 HIGH wifi: wilc1000: avoid buffer overflow in WID string configuration
CVE-2023-53589 8.8 HIGH wifi: iwlwifi: mvm: don't trust firmware n_channels
CVE-2023-53586 8.8 HIGH scsi: target: Fix multiple LUN_RESET handling
CVE-2022-50493 8.8 HIGH scsi: qla2xxx: Fix crash when I/O abort times out
CVE-2023-53598 8.4 HIGH bus: mhi: host: Range check CHDBOFF and ERDBOFF
CVE-2023-53566 7.8 HIGH netfilter: nft_set_rbtree: fix null deref on element insertion
CVE-2023-53536 7.8 HIGH blk-crypto: make blk_crypto_evict_key() more robust
CVE-2023-53560 7.8 HIGH tracing/histograms: Add histograms to hist_vars if they have referenced variables
CVE-2023-53559 7.8 HIGH ip_vti: fix potential slab-use-after-free in decode_session6
CVE-2023-53557 7.8 HIGH fprobe: Release rethook after the ftrace_ops is unregistered
CVE-2023-53537 7.8 HIGH f2fs: fix to avoid use-after-free for cached IPU bio
CVE-2023-53539 7.8 HIGH RDMA/rxe: Fix incomplete state save in rxe_requester
CVE-2023-53545 7.8 HIGH drm/amdgpu: unmap and remove csa_va properly
CVE-2025-39931 7.8 HIGH crypto: af_alg - Set merge to zero early in af_alg_sendmsg

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

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

V. Comments for CVE-2025-39933

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