CVE-2026-18374
4.9
CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:L
Summary
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 Software
| Vendor | Product | Version Range | Status |
|---|---|---|---|
| The GNU C Library | glibc | 0 < 2.45 | affected |
Weaknesses
- Buffer overflow in fopen mode argument processing
- CWE-787: CWE-787 Out-of-bounds write
ADP Enrichment
CVE Program Container
Additional References
References
- https://sourceware.org/bugzilla/show_bug.cgi?id=34574
- https://sourceware.org/git/?p=glibc.git;a=blob_plain;f=advisories/GLIBC-SA-2026-0015
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