CVE-2026-18374
MEDIUM
NVD
CVSS Score
4.9
Severity
MEDIUM
Published
Aug 27, 2026
Vendor
unknown
Description
Passing an effectively empty string to the `,ccs=` syntax extension of the mode argument in the `fopen` function in the GNU C Library version 2.45 or earlier may result in a heap buffer overflow when the mode string input to the function is attacker controlled. This usage pattern is not seen in applications in common GNU/Linux distributions and applications that process user-supplied values for `ccs` should not pass them through without validation.