CVE-2025-39888 — Out-of-bounds Write in Linux
Severity
7.8HIGHNVD
EPSS
0.0%
top 94.20%
CISA KEV
Not in KEV
Exploit
No known exploits
Affected products
Timeline
PublishedSep 23
Description
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.
CVSS vector
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:HExploitability: 1.8 | Impact: 5.9
Affected Packages4 packages
▶CVEListV5linux/linux3568a956932621cafadafc8b75fcf6dc06555105 — 623719227b114d73a2cee45f1b343ced63ce09ec+2
Patches
🔴Vulnerability Details
2OSV▶
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 f↗2025-09-23
GHSA▶
GHSA-jgjw-jx49-6q8j: 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↗2025-09-23