CVE-2025-21856 — Use After Free in Linux
Severity
7.8HIGHNVD
OSV5.5
EPSS
0.0%
top 88.90%
CISA KEV
Not in KEV
Exploit
No known exploits
Affected products
Timeline
PublishedMar 12
Latest updateSep 18
Description
In the Linux kernel, the following vulnerability has been resolved:
s390/ism: add release function for struct device
According to device_release() in /drivers/base/core.c,
a device without a release function is a broken device
and must be fixed.
The current code directly frees the device after calling device_add()
without waiting for other kernel parts to release their references.
Thus, a reference could still be held to a struct device,
e.g., by sysfs, leading to potential use-after-free
iss…
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 Packages6 packages
▶CVEListV5linux/linux8c81ba20349daf9f7e58bb05a0c12f4b71813a30 — 940d15254d2216b585558bcf36312da50074e711+4