CVE-2024-26936

Description

In the Linux kernel, the following vulnerability has been resolved: ksmbd: validate request buffer size in smb2_allocate_rsp_buf() The response buffer should be allocated in smb2_allocate_rsp_buf before validating request. But the fields in payload as well as smb2 header is used in smb2_allocate_rsp_buf(). This patch add simple buffer size validation to avoid potencial out-of-bounds in request buffer.

CVSS Metrics

• v3.1•HIGH•Score: 7.8CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

EPSS Trends

Current EPSS score: 0.02%• Percentile: 7%

Techniques & Countermeasures

• CWE-120•Buffer Copy without Checking Size of Input ('Classic Buffer Overflow')

  The product copies an input buffer to an output buffer without verifying that the size of the input buffer is less than the size of the output buffer.

Affected Systems

• linux•linux

  ≥ 0626e6641f6b467447c81dd7678a69c66f7746cf, < 8f3d0bf1d0c62b539d54c5b9108a845cff619b99 | ≥ 0626e6641f6b467447c81dd7678a69c66f7746cf, < 21ff9d7d223c5c19cb4334009e4c0c83a2f4d674 | ≥ 0626e6641f6b467447c81dd7678a69c66f7746cf, < 5c20b242d4fed73a93591e48bfd9772e2322fb11 | ≥ 0626e6641f6b467447c81dd7678a69c66f7746cf, < 2c27a64a2bc47d9bfc7c3cf8be14be53b1ee7cb6 | ≥ 0626e6641f6b467447c81dd7678a69c66f7746cf, < 17cf0c2794bdb6f39671265aa18aea5c22ee8c4a | 5.15

• linux•linux_kernel

  ≥ 5.15, < 5.15.159 | ≥ 5.16, < 6.1.88 | ≥ 6.2, < 6.6.29 | ≥ 6.7, < 6.8.8 | 6.9:rc1 | 6.9:rc2 | 6.9:rc3 | 6.9:rc4 | 6.9:rc5

References (5)

• https://git.kernel.org/stable/c/8f3d0bf1d0c62b539d54c5b9108a845cff619b99
• https://git.kernel.org/stable/c/21ff9d7d223c5c19cb4334009e4c0c83a2f4d674
• https://git.kernel.org/stable/c/5c20b242d4fed73a93591e48bfd9772e2322fb11
• https://git.kernel.org/stable/c/2c27a64a2bc47d9bfc7c3cf8be14be53b1ee7cb6
• https://git.kernel.org/stable/c/17cf0c2794bdb6f39671265aa18aea5c22ee8c4a