Description
The keyctl_read_key function in security/keys/keyctl.c in the Key Management subcomponent in the Linux kernel before 4.13.5 does not properly consider that a key may be possessed but negatively instantiated, which allows local users to cause a denial of service (OOPS and system crash) via a crafted KEYCTL_READ operation.
References (8)
Core 8
Core References
Issue Tracking, Third Party Advisory x_refsource_confirm
https://bugzilla.redhat.com/show_bug.cgi?id=1493435
Vendor Advisory vendor-advisory
x_refsource_ubuntu
https://usn.ubuntu.com/3583-2/
Vendor Advisory x_refsource_confirm
http://www.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.13.5
Vendor Advisory vendor-advisory
x_refsource_ubuntu
https://usn.ubuntu.com/3583-1/
Vendor Advisory vendor-advisory
x_refsource_redhat
https://access.redhat.com/errata/RHSA-2018:0151
Patch, Vendor Advisory x_refsource_confirm
http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=37863c43b2c6464f252862bf2e9768264e961678
Patch, Vendor Advisory x_refsource_confirm
https://github.com/torvalds/linux/commit/37863c43b2c6464f252862bf2e9768264e961678
Mailing List, Third Party Advisory x_refsource_misc
https://lkml.org/lkml/2017/9/18/764
Scores
CVSS v3
5.5
EPSS
0.0011
EPSS Percentile
29.5%
Attack Vector
LOCAL
CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Details
CWE
CWE-476
Status
published
Products (1)
linux/linux_kernel
< 4.13.4
Published
Oct 12, 2017
Tracked Since
Feb 18, 2026