CVE-2015-7550
linux-2.6 - security update
5.5
MEDIUM
CVSS 3.1
EPSS 0.05%
Description
The keyctl_read_key function in security/keys/keyctl.c in the Linux kernel before 4.3.4 does not properly use a semaphore, which allows local users to cause a denial of service (NULL pointer dereference and system crash) or possibly have unspecified other impact via a crafted application that leverages a race condition between keyctl_revoke and keyctl_read calls.
How to fix CVE-2015-7550
To remediate CVE-2015-7550, upgrade the affected package to a fixed version below.
- —upgrade to 4.3.3-3 or later
- —upgrade to 2.6.32-48squeeze18 or later
Is CVE-2015-7550 being exploited?
Low — EPSS is 0.1%, meaning exploitation activity has not been observed at scale.
Affected packages (2)
- from 0, < 4.3.3-3
- from 0, < 2.6.32-48squeeze18
CVSS scores
| Source | Version | Severity | Vector |
|---|---|---|---|
| osv | CVSS 3.1 | MEDIUM5.5 | CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H |