SEPTEMBER 17, 2026
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Case File

CVE-2026-18374

MEDIUM · CVSS 4.9 EPSS 0.15%

Source: NVD + CISA KEV + EPSS · Published 2026-08-27 · Last synced 2026-09-17

CyberRota Analysis

AI-Generated

The GNU C Library versions 2.45 and earlier are vulnerable to a heap buffer overflow when an attacker-controlled empty string is passed to the `,ccs=` syntax extension in the `fopen` function. This vulnerability could lead to potential memory corruption and exploitation if user-supplied values are not properly validated. Developers and system administrators managing applications that utilize this library should prioritize patching or implementing input validation to mitigate the risk.

CVE
CVE-2026-18374
Severity
MEDIUM
CVSS
4.9
EPSS
0.15%
Linux

Original NVD 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.