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

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/

Details

Risk Information

CVSS v2

CVSS v3