Buffer overflow in Linux
CVE-2025-39888
In the Linux kernel, the following vulnerability has been resolved: fuse: Block access to folio overlimit syz reported a slab-out-of-bounds Write in fuse_dev_do_write. When the number of bytes to be retrieved is truncated to the upper limit by fc->max_pages and there is an offset, the oob is triggered. Add a loop termination condition to prevent overruns.
Vulnerability class: Buffer Overflow
EPSS: 0.001 (3.5th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 7.8 (High). Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.
Affected products
- Linux — versions 3568a956932621cafadafc8b75fcf6dc06555105, 6.16, 0
- Linux Linux_kernel — versions 6.17
Weakness classification (CWE)
References
Frequently asked questions
- What is CVE-2025-39888?
- CVE-2025-39888 is a high-severity vulnerability in Linux, classified under Out-of-bounds Write. CVSS score: 7.8/10. Published 2025-09-23.
- How severe is CVE-2025-39888?
- High severity. CVSS v3 base score is 7.8 out of 10.