CVE-2024-26828
CriticalCVSS 9.4Exploitation Probability (EPSS)
Low risk34th percentile - higher than 34% of all known CVEs
Summary
In the Linux kernel's cifs module, an underflow in parse_server_interfaces() occurs due to comparing ssize_t with size_t, causing the loop to continue with negative bytes_left. The fix addresses the type conversion issue.
Risk Assessment
This vulnerability could lead to improper buffer processing, potentially causing system crashes or privilege escalation.
Recommendation
Install the Linux kernel update with the fix for CVE-2024-26828. Check systems using CIFS/SMB.
Original NVD description (English source)
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.