CVE-2026-18374
- State
- Published
- Severity
- 4.9 Medium
- Published
- Aug 27, 2026
- Updated
- Aug 28, 2026
- Reserved
- Jul 30, 2026
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.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 3.1 | 4.9 Medium | CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:L | glibc |
Weaknesses
- CWE-787 Out-of-bounds write
Affected Products
| Product | Versions |
|---|---|
glibcThe GNU C Library |
|
References
Every record here comes from the CVE Program’s CVE List. © 1999–2026 The MITRE Corporation. CVE is a registered trademark of The MITRE Corporation. The records are reproduced under the CVE Program terms of use.