CVE-2017-12192

Severity: medium (CVSS 5.5 v3.0)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.4% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2017-10-12 · updated 2026-06-17
Weakness: CWE-476

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.

Affected products

Linux kernel: through 4.13.4

References

http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=37863c43b2c6464f252862bf2e9768264e961678
http://www.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.13.5
https://access.redhat.com/errata/RHSA-2018:0151
https://bugzilla.redhat.com/show_bug.cgi?id=1493435
https://github.com/torvalds/linux/commit/37863c43b2c6464f252862bf2e9768264e961678
https://lkml.org/lkml/2017/9/18/764
https://usn.ubuntu.com/3583-1/
https://usn.ubuntu.com/3583-2/
http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=37863c43b2c6464f252862bf2e9768264e961678
http://www.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.13.5
https://access.redhat.com/errata/RHSA-2018:0151
https://bugzilla.redhat.com/show_bug.cgi?id=1493435

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