4.9
Medium
CVE-2026-18374 Passing an effectively empty string to the `,ccs=` syntax extension of the mode argument in the `fopen` function in…
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.
Affected products and versions
| Product | Affected versions | Fixed in |
|---|---|---|
| glibc 2.45 | earliest → < 2.45 | 2.45 |
References
- sourceware.org sourceware.org
- sourceware.org sourceware.org
Timeline
- Published
- Last modified
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