CVE-2024-26828

Description

In the Linux kernel, the following vulnerability has been resolved: cifs: fix underflow in parse_server_interfaces() In this loop, we step through the buffer and after each item we check if the size_left is greater than the minimum size we need. However, the problem is that "bytes_left" is type ssize_t while sizeof() is type size_t. That means that because of type promotion, the comparison is done as an unsigned and if we have negative bytes left the loop continues instead of ending.

CVSS Metrics

• v3.1•MEDIUM•Score: 6.7CVSS:3.1/AV:A/AC:L/PR:L/UI:R/S:U/C:N/I:H/A:H

EPSS Trends

Current EPSS score: 0.02%• Percentile: 5%

Techniques & Countermeasures

• CWE-191•Integer Underflow (Wrap or Wraparound)

  The product subtracts one value from another, such that the result is less than the minimum allowable integer value, which produces a value that is not equal to the correct result.

Affected Systems

• linux•linux

  ≥ fe856be475f7cf5ffcde57341d175ce9fd09434b, < 7190353835b4a219abb70f90b06cdcae97f11512 | ≥ fe856be475f7cf5ffcde57341d175ce9fd09434b, < f7ff1c89fb6e9610d2b01c1821727729e6609308 | ≥ fe856be475f7cf5ffcde57341d175ce9fd09434b, < df2af9fdbc4ddde18a3371c4ca1a86596e8be301 | ≥ fe856be475f7cf5ffcde57341d175ce9fd09434b, < cffe487026be13eaf37ea28b783d9638ab147204 | 4.18

• linux•linux_kernel

  ≥ 4.18, < 6.1.79 | ≥ 6.2, < 6.6.18 | ≥ 6.7, < 6.7.6 | 6.8:rc1 | 6.8:rc2 | 6.8:rc3 | 6.8:rc4

References (4)

• https://git.kernel.org/stable/c/7190353835b4a219abb70f90b06cdcae97f11512
• https://git.kernel.org/stable/c/f7ff1c89fb6e9610d2b01c1821727729e6609308
• https://git.kernel.org/stable/c/df2af9fdbc4ddde18a3371c4ca1a86596e8be301
• https://git.kernel.org/stable/c/cffe487026be13eaf37ea28b783d9638ab147204