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I. Basic Information for CVE-2025-37947
Vulnerability Information

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Vulnerability Title
ksmbd: prevent out-of-bounds stream writes by validating *pos
Source: NVD (National Vulnerability Database)
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: ksmbd: prevent out-of-bounds stream writes by validating *pos ksmbd_vfs_stream_write() did not validate whether the write offset (*pos) was within the bounds of the existing stream data length (v_len). If *pos was greater than or equal to v_len, this could lead to an out-of-bounds memory write. This patch adds a check to ensure *pos is less than v_len before proceeding. If the condition fails, -EINVAL is returned.
Source: NVD (National Vulnerability Database)
CVSS Information
N/A
Source: NVD (National Vulnerability Database)
Vulnerability Type
N/A
Source: NVD (National Vulnerability Database)
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ksmbd_vfs_stream_write未验证pos导致越界写入。
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 0626e6641f6b467447c81dd7678a69c66f7746cf ~ 7f61da79df86fd140c7768e668ad846bfa7ec8e1 -
LinuxLinux 5.15 -
II. Public POCs for CVE-2025-37947
#POC DescriptionSource LinkShenlong Link
1Blog Post: https://blog.doyensec.com/2025/10/08/ksmbd-3.htmlhttps://github.com/doyensec/KSMBD-CVE-2025-37947POC Details
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III. Intelligence Information for CVE-2025-37947
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IV. Related Vulnerabilities
V. Comments for CVE-2025-37947

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